SSM框架整合-视频网站简单开发

本文详细介绍了SSM框架的整合过程,包括Spring、SpringMVC和Mybatis的配置,以及如何使用这些技术开发视频网站后台管理系统。涵盖视频查询展示、详情展示、上传图片等功能的实现。

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一、视频架构模式

  1. 自建模式(自己去搭建视频云服务器。因为占服务器的宽带,所以传统服务器不能做视频服务器,需要自己搭建视频服务器):
      需要跟电信运营商拉专线,还要配置CDN(加速用,就是内容分发,大型网站的高并发解决方案的一个理念)、防盗链、缓存、提供给移动APP的接口(SDK)等,所以一般都是使用第三方视频接口,它们拥有成熟的视频解决方案, 解决拉专线和配置的问题。
      PS:内容分发:其实就是将多台服务器部署在不同地区,就近进行访问。
  2. 第三方模式:
      使用第三方云视频接口:阿里云、保利云(8毛)、乐视云(4毛G)。

二、SSM项目整合

  1. 分布式与分模块开发的区别?
    分布式:一个项目拆分不同的项目进行部署开发,通过http协议进行通讯–微服务。
    分模块开发:一个项目拆分成了子工程、父工程,通过jar包进行通讯。
  2. 整合思路:
    1. 引入jar包。
    2. Spring整合SpringMVC, 建立springmcv核心加载配置文件,配置包路径扫描、视图转发器、转换json格式、上传图片等,并在web.xml中加载springmvc.xml。
    3. Spring整合Mybatis,建立spring其它配置文件,配置包扫描、数据源等。
  3. 分模块开发,SSM环境搭建:
    1. 创建maven工程的父子依赖关系:
      videowebsite-parent–父工程,打包方式pom,管理jar包的版本号,项目中所有工程都应该继承父工程。
      videowebsite-commons–通用的工具类通用的pojo,打包方式jar。
      videowebsite-dao–数据库访问层(持久化层),打包方式jar。
      videowebsite-service–服务层,打包方式jar。
      videowebsite-entity–实体类,打包方式jar。
      videowebsite-web–表现层工程,打包方式war。
    2. 在videowebsite-parent父工程中为pom.xml添加maven依赖:
      <!-- 集中定义依赖版本号 -->
      <properties>
      	<junit.version>4.12</junit.version>
      	<spring.version>5.1.6.RELEASE</spring.version>
      	<mybatis.version>3.5.1</mybatis.version>
      	<mybatis.spring.version>2.0.1</mybatis.spring.version>
      	<mybatis.paginator.version>1.2.17</mybatis.paginator.version>
      	<mysql.version>8.0.15</mysql.version>
      	<slf4j.version>1.7.26</slf4j.version>
      	<jackson.version>2.9.8</jackson.version>
      	<druid.version>1.1.16</druid.version>
      	<httpclient.version>4.5.8</httpclient.version>
      	<jstl.version>1.2</jstl.version>
      	<servlet-api.version>3.0-alpha-1</servlet-api.version>
      	<jsp-api.version>2.0</jsp-api.version>
      	<joda-time.version>2.10.1</joda-time.version>
      	<commons-lang3.version>3.9</commons-lang3.version>
      	<commons-io.version>2.6</commons-io.version>
      	<commons-net.version>3.6</commons-net.version>
      	<pagehelper.version>5.1.8</pagehelper.version>
      	<jsqlparser.version>0.9.1</jsqlparser.version>
      	<commons-fileupload.version>1.4</commons-fileupload.version>
      	<jedis.version>3.1.0-m1</jedis.version>
      	<solrj.version>4.10.3</solrj.version>
      </properties>
      <dependencyManagement>
      	<dependencies>
      		<!-- 时间操作组件 -->
      		<dependency>
      			<groupId>joda-time</groupId>
      			<artifactId>joda-time</artifactId>
      			<version>${joda-time.version}</version>
      		</dependency>
      		<!-- Apache工具组件 -->
      		<dependency>
      			<groupId>org.apache.commons</groupId>
      			<artifactId>commons-lang3</artifactId>
      			<version>${commons-lang3.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>org.apache.commons</groupId>
      			<artifactId>commons-io</artifactId>
      			<version>${commons-io.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>commons-net</groupId>
      			<artifactId>commons-net</artifactId>
      			<version>${commons-net.version}</version>
      		</dependency>
      		<!-- Jackson Json处理工具包 -->
      		<dependency>
      			<groupId>com.fasterxml.jackson.core</groupId>
      			<artifactId>jackson-databind</artifactId>
      			<version>${jackson.version}</version>
      		</dependency>
      		<!-- httpclient -->
      		<dependency>
      			<groupId>org.apache.httpcomponents</groupId>
      			<artifactId>httpclient</artifactId>
      			<version>${httpclient.version}</version>
      		</dependency>
      		<!-- 单元测试 -->
      		<dependency>
      			<groupId>junit</groupId>
      			<artifactId>junit</artifactId>
      			<version>${junit.version}</version>
      			<scope>test</scope>
      		</dependency>
      		<!-- 日志处理 -->
      		<dependency>
      			<groupId>org.slf4j</groupId>
      			<artifactId>slf4j-log4j12</artifactId>
      			<version>${slf4j.version}</version>
      		</dependency>
      		<!-- Mybatis -->
      		<dependency>
      			<groupId>org.mybatis</groupId>
      			<artifactId>mybatis</artifactId>
      			<version>${mybatis.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>org.mybatis</groupId>
      			<artifactId>mybatis-spring</artifactId>
      			<version>${mybatis.spring.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>com.github.miemiedev</groupId>
      			<artifactId>mybatis-paginator</artifactId>
      			<version>${mybatis.paginator.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>com.github.pagehelper</groupId>
      			<artifactId>pagehelper</artifactId>
      			<version>${pagehelper.version}</version>
      		</dependency>
      		<!-- MySql -->
      		<dependency>
      			<groupId>mysql</groupId>
      			<artifactId>mysql-connector-java</artifactId>
      			<version>${mysql.version}</version>
      		</dependency>
      		<!-- 连接池 -->
      		<dependency>
      			<groupId>com.alibaba</groupId>
      			<artifactId>druid</artifactId>
      			<version>${druid.version}</version>
      		</dependency>
      		<!-- Spring -->
      		<dependency>
      			<groupId>org.springframework</groupId>
      			<artifactId>spring-context</artifactId>
      			<version>${spring.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>org.springframework</groupId>
      			<artifactId>spring-beans</artifactId>
      			<version>${spring.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>org.springframework</groupId>
      			<artifactId>spring-webmvc</artifactId>
      			<version>${spring.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>org.springframework</groupId>
      			<artifactId>spring-jdbc</artifactId>
      			<version>${spring.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>org.springframework</groupId>
      			<artifactId>spring-aspects</artifactId>
      			<version>${spring.version}</version>
      		</dependency>
      		<!-- JSP相关 -->
      		<dependency>
      			<groupId>jstl</groupId>
      			<artifactId>jstl</artifactId>
      			<version>${jstl.version}</version>
      		</dependency>
      		<dependency>
      			<groupId>javax.servlet</groupId>
      			<artifactId>servlet-api</artifactId>
      			<version>${servlet-api.version}</version>
      			<scope>provided</scope>
      		</dependency>
      		<dependency>
      			<groupId>javax.servlet</groupId>
      			<artifactId>jsp-api</artifactId>
      			<version>${jsp-api.version}</version>
      			<scope>provided</scope>
      		</dependency>
      		<!-- 文件上传组件 -->
      		<dependency>
      			<groupId>commons-fileupload</groupId>
      			<artifactId>commons-fileupload</artifactId>
      			<version>${commons-fileupload.version}</version>
      		</dependency>
      		<!-- Redis客户端 -->
      		<dependency>
      			<groupId>redis.clients</groupId>
      			<artifactId>jedis</artifactId>
      			<version>${jedis.version}</version>
      		</dependency>
      	</dependencies>
      </dependencyManagement>
      
      <build>
      	<finalName>${project.artifactId}</finalName>
      	<plugins>
      		<!-- 资源文件拷贝插件 -->
      		<plugin>
      			<groupId>org.apache.maven.plugins</groupId>
      			<artifactId>maven-resources-plugin</artifactId>
      			<version>2.7</version>
      			<configuration>
      				<encoding>UTF-8</encoding>
      			</configuration>
      		</plugin>
      		<!-- java编译插件 -->
      		<plugin>
      			<groupId>org.apache.maven.plugins</groupId>
      			<artifactId>maven-compiler-plugin</artifactId>
      			<version>3.2</version>
      			<configuration>
      				<source>1.8</source>
      				<target>1.8</target>
      				<encoding>UTF-8</encoding>
      			</configuration>
      		</plugin>
      	</plugins>
      	<pluginManagement>
      		<plugins>
      			<!-- 配置Tomcat插件 -->
      			<plugin>
      				<groupId>org.apache.tomcat.maven</groupId>
      				<artifactId>tomcat7-maven-plugin</artifactId>
      				<version>2.2</version>
      			</plugin>
      		</plugins>
      	</pluginManagement>
      </build>
      
    3. Spring整合SpringMVC:
      SpringMVC的执行流程:
        SpringMVC的核心是DispatcherServlet类(通过这个类可知SpringMVC的底层就是servlet),任何请求都会先交给DispatcherServlet进行转发,转发后再分发到某一个请求中去,再拿到转换视图器到某一个页面。
      1. 在表现层videowebsite-web工程中为pom.xml引入maven依赖:
        <dependencies>
        	<dependency>
        		<groupId>chauncy</groupId>
        		<artifactId>videowebsite-service</artifactId>
        		<version>0.0.1-SNAPSHOT</version>
        	</dependency>
        	<!-- JSP相关 -->
        	<dependency>
        		<groupId>jstl</groupId>
        		<artifactId>jstl</artifactId>
        	</dependency>
        	<dependency>
        		<groupId>javax.servlet</groupId>
        		<artifactId>servlet-api</artifactId>
        		<scope>provided</scope>
        	</dependency>
        	<dependency>
        		<groupId>javax.servlet</groupId>
        		<artifactId>jsp-api</artifactId>
        		<scope>provided</scope>
        	</dependency>
        	<!-- 文件上传组件 -->
        	<dependency>
        		<groupId>commons-fileupload</groupId>
        		<artifactId>commons-fileupload</artifactId>
        	</dependency>
        	<!-- springwebmvc -->
        	<dependency>
        		<groupId>org.springframework</groupId>
        		<artifactId>spring-webmvc</artifactId>
        	</dependency>
        	<dependency>
        		<groupId>chauncy</groupId>
        		<artifactId>videowebsite-entity</artifactId>
        		<version>0.0.1-SNAPSHOT</version>
        	</dependency>
        	<dependency>
        		<groupId>com.fasterxml.jackson.core</groupId>
        		<artifactId>jackson-annotations</artifactId>
        		<version>2.9.8</version>
        	</dependency>
        	<dependency>
        		<groupId>com.fasterxml.jackson.core</groupId>
        		<artifactId>jackson-core</artifactId>
        		<version>2.9.8</version>
        	</dependency>
        	<dependency>
        		<groupId>com.fasterxml.jackson.core</groupId>
        		<artifactId>jackson-databind</artifactId>
        	</dependency>
        	<dependency>
        		<groupId>com.fasterxml.jackson.jr</groupId>
        		<artifactId>jackson-jr-all</artifactId>
        		<version>2.9.8</version>
        	</dependency>
        </dependencies>
        
      2. 新增springmvc.xml配置文件:
        <?xml version="1.0" encoding="UTF-8"?>
        <beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
            xmlns:context="http://www.springframework.org/schema/context"
            xmlns:mvc="http://www.springframework.org/schema/mvc"
            xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
                http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
            <!-- springmvc 扫包范围 -->
            <context:component-scan base-package="chauncy.controller" />
            <!-- 开启springmvc注解 -->
            <mvc:annotation-driven />
            <!-- 视图跳转类型 -->
            <bean
                class="org.springframework.web.servlet.view.InternalResourceViewResolver">
                <property name="prefix" value="/WEB-INF/jsp/" />
                <property name="suffix" value=".jsp" />
            </bean>
        </beans>
        
      3. web.xml加载SpringMVC配置文件:
        <!-- 解决post乱码 -->
        <filter>
        	<filter-name>CharacterEncodingFilter</filter-name>
        	<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        	<init-param>
        		<param-name>encoding</param-name>
        		<param-value>UTF-8</param-value>
        	</init-param>
        	<!-- <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> 
        		</init-param> -->
        </filter>
        <filter-mapping>
        	<filter-name>CharacterEncodingFilter</filter-name>
        	<url-pattern>/*</url-pattern>
        </filter-mapping>
        <!-- springmvc的前端控制器 -->
        <servlet>
        	<servlet-name>videowebsite-web</servlet-name>
        	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        	<!-- contextConfigLocation不是必须的, 如果不配置contextConfigLocation, springmvc的配置文件默认在:WEB-INF/servlet的name+"-servlet.xml" -->
        	<init-param>
        		<param-name>contextConfigLocation</param-name>
        		<param-value>classpath:spring/springmvc.xml</param-value>
        	</init-param>
        	<load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
        	<servlet-name>videowebsite-web</servlet-name>
        	<url-pattern>/</url-pattern>
        </servlet-mapping>
        
    4. Spring整合Mybatis:
      1. 创建视频类型、视频详情表:
        --视频类型表
        CREATE TABLE `video_type` (
          `id` int(11) PRIMARY KEY  NOT NULL AUTO_INCREMENT COMMENT '主键(自增长)',
          `type_name` varchar(30) DEFAULT NULL COMMENT '视频类型'
        ) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
        
        --视频详情表
        CREATE TABLE `video_info` (
          `id` int(11) PRIMARY KEY NOT NULL AUTO_INCREMENT COMMENT '主键(自增长)',
          `video_name` varchar(150) DEFAULT NULL COMMENT '视频名称',
          `video_url` varchar(100) DEFAULT NULL COMMENT '封面图片',
          `video_html` varchar(500) DEFAULT NULL COMMENT '视频html执行元素',
          `video_type_id` int DEFAULT NULL COMMENT '关联typeID',
          `video_del` INT DEFAULT 0 COMMENT '是否显示 0显示 1隐藏'
        ) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
        
      2. 在持久化层videowebsite-dao工程中为pom.xml引入maven依赖:
        <!-- 依赖管理 -->
        <dependencies>
        	<dependency>
        		<groupId>chauncy</groupId>
        		<artifactId>videowebsite-entity</artifactId>
        		<version>0.0.1-SNAPSHOT</version>
        	</dependency>
        	<!-- Mybatis -->
        	<dependency>
        		<groupId>org.mybatis</groupId>
        		<artifactId>mybatis</artifactId>
        	</dependency>
        	<dependency>
        		<groupId>org.mybatis</groupId>
        		<artifactId>mybatis-spring</artifactId>
        	</dependency>
        	<dependency>
        		<groupId>com.github.miemiedev</groupId>
        		<artifactId>mybatis-paginator</artifactId>
        	</dependency>
        	<dependency>
        		<groupId>com.github.pagehelper</groupId>
        		<artifactId>pagehelper</artifactId>
        	</dependency>
        	<!-- MySql -->
        	<dependency>
        		<groupId>mysql</groupId>
        		<artifactId>mysql-connector-java</artifactId>
        	</dependency>
        	<!-- 连接池 -->
        	<dependency>
        		<groupId>com.alibaba</groupId>
        		<artifactId>druid</artifactId>
        	</dependency>
        </dependencies>
        <!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->
        <build>
        	<resources>
        		<resource>
        			<directory>src/main/java</directory>
        			<includes>
        				<include>**/*.properties</include>
        				<include>**/*.xml</include>
        			</includes>
        			<filtering>false</filtering>
        		</resource>
        	</resources>
        </build>
        
      3. 在服务层videowebsite-service工程中为pom.xml引入maven依赖:
        <dependencies>
        	<dependency>
        		<groupId>chauncy</groupId>
        		<artifactId>videowebsite-dao</artifactId>
        		<version>0.0.1-SNAPSHOT</version>
        	</dependency>
        	<!-- Spring -->
        	<dependency>
        		<groupId>org.springframework</groupId>
        		<artifactId>spring-context</artifactId>
        	</dependency>
        	<dependency>
        		<groupId>org.springframework</groupId>
        		<artifactId>spring-beans</artifactId>
        	</dependency>
        	<dependency>
        		<groupId>org.springframework</groupId>
        		<artifactId>spring-jdbc</artifactId>
        	</dependency>
        	<dependency>
        		<groupId>org.springframework</groupId>
        		<artifactId>spring-aspects</artifactId>
        	</dependency>
        	<!-- 日志处理 -->
        	<dependency>
        		<groupId>org.slf4j</groupId>
        		<artifactId>slf4j-log4j12</artifactId>
        	</dependency>
        </dependencies>
        
      4. 在表现层videowebsite-web工程中新增applicationContext-service.xml:
        <beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
            xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
            http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
            <!-- 开启spring注解扫描范围,扫描service包下注解 -->
            <context:component-scan base-package="chauncy.service"></context:component-scan>
        </beans>
        
      5. 在表现层videowebsite-web工程中新增db.properties:
        jdbc.driver=com.mysql.cj.jdbc.Driver
        jdbc.host=localhost
        jdbc.database=architect
        jdbc.userName=root
        jdbc.passWord=root
        jdbc.initialSize=0  
        jdbc.maxActive=20    
        jdbc.maxIdle=20  
        jdbc.minIdle=1  
        jdbc.maxWait=1000
        
      6. 在表现层videowebsite-web工程中新增applicationContext-dao.xml:
        <beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
            xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
            http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
        
            <!-- 数据库连接池 -->
            <!-- 加载配置文件 -->
            <context:property-placeholder location="classpath:properties/*.properties" />
            <!-- 数据库连接池 -->
            <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
                destroy-method="close">
            <property name="driverClassName" value="${jdbc.driver}" />
                <property name="url"
                    value="jdbc:mysql://${jdbc.host}:3306/${jdbc.database}?serverTimezone=GMT&amp;useUnicode=true&amp;characterEncoding=utf-8&amp;zeroDateTimeBehavior=convertToNull" />
                <property name="username" value="${jdbc.userName}" />
                <property name="password" value="${jdbc.passWord}" />
                <!-- 初始化连接大小 -->
                <property name="initialSize" value="${jdbc.initialSize}"></property>
                <!-- 连接池最大数量 -->
                <property name="maxActive" value="${jdbc.maxActive}"></property>
                <!-- 连接池最大空闲 -->
                <property name="maxIdle" value="${jdbc.maxIdle}"></property>
                <!-- 连接池最小空闲 -->
                <property name="minIdle" value="${jdbc.minIdle}"></property>
            </bean>
        
             <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 -->  
            <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
                <property name="dataSource" ref="dataSource" />  
                <!-- 自动扫描mapping.xml文件 -->  
                <property name="mapperLocations" value="classpath:mappings/*.xml"></property>  
            </bean>  
          
            <!-- DAO接口所在包名,Spring会自动查找其下的类 -->  
            <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
                <property name="basePackage" value="chauncy.dao" />  
                <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>  
            </bean>  
          
        </beans>
        
      7. 在表现层videowebsite-web工程中新增applicationContext-dao.xml:
        <beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
            xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
            http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
            <!-- 事务管理器 -->
            <bean id="transactionManager"
                class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
                <!-- 数据源 -->
                <property name="dataSource" ref="dataSource" />
            </bean>
            <!-- 配置事务增强 -->
            <tx:advice id="txAdvice" transaction-manager="transactionManager">
                <tx:attributes>
                    <!-- name:标识哪些方法需要被被事务增强,propagation:配置事务传播行为,read-only:配置是否只是读操作 -->
                    <tx:method name="save*" propagation="REQUIRED" />
                    <tx:method name="insert*" propagation="REQUIRED" />
                    <tx:method name="add*" propagation="REQUIRED" />
                    <tx:method name="create*" propagation="REQUIRED" />
                    <tx:method name="delete*" propagation="REQUIRED" />
                    <tx:method name="update*" propagation="REQUIRED" />
                    <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
                    <tx:method name="select*" propagation="SUPPORTS" read-only="true" />
                    <tx:method name="get*" propagation="SUPPORTS" read-only="true" />
                </tx:attributes>
            </tx:advice>
            <!-- Aop配置: 拦截哪些方法(切入点表表达式) + 应用上面的事务增强配置 -->
            <aop:config>
                <!-- <aop:pointcut expression="execution(* chauncy.service.*.*(..))"
                    id="pt" /> -->
                <aop:advisor advice-ref="txAdvice"
                    pointcut="execution(* chauncy.service.*.*(..))" />
            </aop:config>
        </beans>
        
      8. 使用Mybatis逆向工程生成器生成数据ORM映射文件,并放置到项目中。
      9. 实现查询所有视频类型:
        package chauncy.controller;
        
        import java.util.List;
        
        import org.springframework.beans.factory.annotation.Autowired;
        import org.springframework.stereotype.Controller;
        import org.springframework.web.bind.annotation.RequestMapping;
        import org.springframework.web.bind.annotation.ResponseBody;
        
        import chauncy.entity.VideoType;
        import chauncy.service.VideoTypeServive;
        
        @Controller
        @RequestMapping("/VideoTypeController")
        public class VideoTypeController {
        	
        	private static final String TEST="test";
        	
        	@Autowired
        	private VideoTypeServive videoTypeService;
        	
        	@RequestMapping("/hello")
        	public String hello(){
        		return TEST;
        	}
        	
        	/**   
        	 * @methodDesc: 功能描述(提供一个返回json格式的查询所有VideoType)  
        	 * @author: ChauncyWang
        	 * @param: @return  
        	 * @returnType: List<VideoType>  
        	 */  
        	@RequestMapping("/getVideoTypeList")
        	@ResponseBody
        	public List<VideoType> getVideoTypeList(){
        		List<VideoType> videoTypes = videoTypeService.getVideoTypes(null);
        		for (VideoType videoType : videoTypes) {
        			System.out.println(videoType.toString());
        		}
        		return videoTypes;
        	}
        }
        
        package chauncy.service;
        
        import java.util.List;
        
        import chauncy.entity.VideoType;
        
        public interface VideoTypeServive {
        	
        	/**   
        	 * @methodDesc: 功能描述(查询所有的视频类型)  
        	 * @author: ChauncyWang
        	 * @param: @return      
        	 * @returnType: List<VideoType>  
        	 */  
        	public List<VideoType> getVideoTypes(VideoType videoType);
        }
        
        package chauncy.service.impl;
        
        import java.util.List;
        
        import org.springframework.beans.factory.annotation.Autowired;
        import org.springframework.stereotype.Service;
        
        import chauncy.dao.VideoTypeMapper;
        import chauncy.entity.VideoType;
        import chauncy.service.VideoTypeServive;
        
        @Service
        public class VideoTypeServiceImpl implements VideoTypeServive {
        	
        	@Autowired
        	private VideoTypeMapper videoTypeMapper;
        
        	@Override
        	public List<VideoType> getVideoTypes(VideoType videoType) {
        		return videoTypeMapper.selectList(videoType);
        	}
        
        }
        
        package chauncy.dao;
        
        import java.util.List;
        
        import chauncy.entity.VideoType;
        
        public interface VideoTypeMapper {
        	int deleteByPrimaryKey(Integer id);
        
        	int insert(VideoType record);
        
        	int insertSelective(VideoType record);
        
        	VideoType selectByPrimaryKey(Integer id);
        
        	int updateByPrimaryKeySelective(VideoType record);
        
        	int updateByPrimaryKey(VideoType record);
        
        	List<VideoType> selectList(VideoType record);
        }
        
        <?xml version="1.0" encoding="UTF-8" ?>
        <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
        <mapper namespace="chauncy.dao.VideoTypeMapper">
        	<resultMap id="BaseResultMap" type="chauncy.entity.VideoType">
        		<id column="id" property="id" jdbcType="INTEGER" />
        		<result column="type_name" property="typeName" jdbcType="VARCHAR" />
        	</resultMap>
        	<sql id="Base_Column_List">
        		id, type_name
        	</sql>
        	<select id="selectByPrimaryKey" resultMap="BaseResultMap"
        		parameterType="java.lang.Integer">
        		select
        		<include refid="Base_Column_List" />
        		from video_type
        		where id = #{id,jdbcType=INTEGER}
        	</select>
        	<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
        		delete from
        		video_type
        		where id = #{id,jdbcType=INTEGER}
        	</delete>
        	<insert id="insert" parameterType="chauncy.entity.VideoType">
        		insert into video_type (id,
        		type_name)
        		values (#{id,jdbcType=INTEGER},
        		#{typeName,jdbcType=VARCHAR})
        	</insert>
        	<insert id="insertSelective" parameterType="chauncy.entity.VideoType">
        		insert into video_type
        		<trim prefix="(" suffix=")" suffixOverrides=",">
        			<if test="id != null">
        				id,
        			</if>
        			<if test="typeName != null">
        				type_name,
        			</if>
        		</trim>
        		<trim prefix="values (" suffix=")" suffixOverrides=",">
        			<if test="id != null">
        				#{id,jdbcType=INTEGER},
        			</if>
        			<if test="typeName != null">
        				#{typeName,jdbcType=VARCHAR},
        			</if>
        		</trim>
        	</insert>
        	<update id="updateByPrimaryKeySelective" parameterType="chauncy.entity.VideoType">
        		update video_type
        		<set>
        			<if test="typeName != null">
        				type_name = #{typeName,jdbcType=VARCHAR},
        			</if>
        		</set>
        		where id = #{id,jdbcType=INTEGER}
        	</update>
        	<update id="updateByPrimaryKey" parameterType="chauncy.entity.VideoType">
        		update video_type
        		set type_name = #{typeName,jdbcType=VARCHAR}
        		where id =
        		#{id,jdbcType=INTEGER}
        	</update>
        	<select id="selectList" resultMap="BaseResultMap"
        		parameterType="chauncy.entity.VideoType">
        		select
        		<include refid="Base_Column_List" />
        		from video_type
        		where
        		1=1
        		<if test="id != null">
        			and #{id,jdbcType=INTEGER},
        		</if>
        		<if test="typeName != null">
        			and #{typeName,jdbcType=VARCHAR},
        		</if>
        
        	</select>
        
        </mapper>
        
      10. web.xml配置加载Spring:
        <!-- 加载spring容器 -->
        <context-param>
        	<param-name>contextConfigLocation</param-name>
        	<param-value>classpath:spring/applicationContext-*.xml</param-value>
        </context-param>
        <listener>
        	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        
      11. 运行结果解决406:
        使用SpringMVC返回json格式,返回状态406,表示SpringMVC没有集成JSON转换器,解决办法:
        <!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
        <bean id="mappingJacksonHttpMessageConverter"
        	class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
        	<property name="supportedMediaTypes">
        		<list>
        			<value>text/html;charset=UTF-8</value>
        		</list>
        	</property>
        </bean>
        
        <!-- 启动Spring MVC的注解功能,完成请求和注解POJO的映射 -->
        <bean
        	class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        	<property name="messageConverters">
        		<list>
        			<ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
        		</list>
        	</property>
        </bean>
        
    5. Spring整合log4j:
      注:以下配置只限于Spring4.0及以下版本可用,Spring5.0以上需要变更配置方式,在此不做列举。
      1. 创建log4j.properties:
        在resources/properties下创建log4j.properties文件
        ### set log levels ###
        log4j.rootLogger =INFO,DEBUG, stdout , R
        
        log4j.appender.stdout = org.apache.log4j.ConsoleAppender
        log4j.appender.stdout.Target = System.out
        log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
        log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
        
        log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
        log4j.appender.D.File = D://EclipseWorkspace/EclipseMars2/ArchitectFirstPhase/AllProjectLogs/SSMIntegrationAndVideoWebsiteDevelop.log
        log4j.appender.D.Append = true
        log4j.appender.D.Threshold = DEBUG
        log4j.appender.D.layout = org.apache.log4j.PatternLayout
        log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
        
        log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
        log4j.appender.E.File =D://EclipseWorkspace/EclipseMars2/ArchitectFirstPhase/AllProjectLogs/SSMIntegrationAndVideoWebsiteDevelopError.log
        log4j.appender.E.Append = true
        log4j.appender.E.Threshold = ERROR
        log4j.appender.E.layout = org.apache.log4j.PatternLayout
        log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
        
      2. web.xml加载log4j.properties:
        <!--设置log4j的配置文件位置 -->
        <context-param>
        	<param-name>log4jConfigLocation</param-name>
        	<param-value>/WEB-INF/classes/properties/log4j.properties</param-value>
        </context-param>
        <!--使用监听加载log4j的配置文件 -->
        <listener>
        	<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
        </listener>
        
      3. 在代码中需要日志管理的类使用API:
        private static Logger logger = Logger.getLogger(类名.class);
        

三、视频网站后台管理系统开发实现

  1. 实现后台视频查询展示功能:
    1. 建立查询jsp页面:
      <%@ page language="java" contentType="text/html; charset=utf-8"
      	pageEncoding="utf-8"%>
      <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
      <!DOCTYPE html>
      <html>
      <head>
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <title>后台视频管理系统</title>
      </head>
      <body>
      	<center>
      		<h1>视频网站后台管理系统</h1>
      		<a href="locaAddVideo">添加资源</a>
      		<table style="BORDER-COLLAPSE: collapse; text-align: center;"
      			borderColor=#000000 height=40 cellPadding=1 width="70%"
      			align="center" border=1>
      			<thead>
      				<tr>
      					<th>图片</th>
      					<th>视频名称</th>
      					<th>视频类型</th>
      					<th>预览视频</th>
      				</tr>
      			</thead>
      			<tbody>
      				<c:forEach items="${listVideo}" var="p">
      					<tr style="font-size: 18px">
      						<td><img alt="" width="150px;" height="150px;"
      							src="/static/imgs/${p.videoUrl}"></td>
      						<td>${p.videoName}</td>
      						<td>${p.typeName}</td>
      						<td><a href="videoDetails?id=${p.id}"
      							style='text-decoration: none;'>预览视频</a></td>
      					</tr>
      				</c:forEach>
      
      
      			</tbody>
      		</table>
      
      	</center>
      </body>
      </html>
      
    2. 后台代码实现:
      package chauncy.controller;
      
      import javax.servlet.http.HttpServletRequest;
      import javax.servlet.http.HttpServletResponse;
      
      import org.springframework.beans.factory.annotation.Autowired;
      import org.springframework.stereotype.Controller;
      import org.springframework.web.bind.annotation.RequestMapping;
      
      import chauncy.service.VideoInfoService;
      
      @Controller
      @RequestMapping("/VideoInfoController")
      public class VideoInfoController {
      	
      	@Autowired
      	private VideoInfoService videoInfoService;
      	
      	private static final String INDEXVIDEO="indexVideo";
      	
      	/**   
      	 * @methodDesc: 功能描述(查询所有视频)  
      	 * @author: ChauncyWang
      	 * @param: @param httpServletRequest
      	 * @param: @param httpServletResponse
      	 * @param: @return     
      	 * @returnType: String  
      	 */  
      	@RequestMapping("/indexVideo")
      	public String indexVideo(HttpServletRequest httpServletRequest,HttpServletResponse httpServletResponse){
      		httpServletRequest.setAttribute("listVideo", videoInfoService.getVideoInfos(null));
      		return INDEXVIDEO;
      	}
      	
      }
      
      package chauncy.service;
      
      import java.util.List;
      
      import chauncy.entity.VideoInfo;
      
      public interface VideoInfoService {
      	
      	public List<VideoInfo> getVideoInfos(VideoInfo videoInfo);
      }
      
      package chauncy.service.impl;
      
      import java.util.List;
      
      import org.springframework.beans.factory.annotation.Autowired;
      import org.springframework.stereotype.Service;
      
      import chauncy.dao.VideoInfoMapper;
      import chauncy.entity.VideoInfo;
      import chauncy.service.VideoInfoService;
      
      @Service
      public class VideoInfoServiceImpl implements VideoInfoService {
      	
      	@Autowired
      	private VideoInfoMapper videoInfoMapper;
      	
      	@Override
      	public List<VideoInfo> getVideoInfos(VideoInfo videoInfo){
      		return videoInfoMapper.selectAll(videoInfo);
      	}
      }
      
      package chauncy.dao;
      
      import java.util.List;
      
      import chauncy.entity.VideoInfo;
      
      public interface VideoInfoMapper {
      	List<VideoInfo> selectAll(VideoInfo record);
      }
      
      <?xml version="1.0" encoding="UTF-8" ?>
      <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
      <mapper namespace="chauncy.dao.VideoInfoMapper">
      	<resultMap id="BaseResultMap" type="chauncy.entity.VideoInfo">
      		<id column="id" property="id" jdbcType="INTEGER" />
      		<result column="video_name" property="videoName" jdbcType="VARCHAR" />
      		<result column="video_url" property="videoUrl" jdbcType="VARCHAR" />
      		<result column="video_html" property="videoHtml" jdbcType="VARCHAR" />
      		<result column="video_type_id" property="videoTypeId" jdbcType="INTEGER" />
      		<result column="video_del" property="videoDel" jdbcType="INTEGER" />
      	</resultMap>
      	<sql id="Base_Column_List">
      		id, video_name, video_url, video_html, video_type_id, video_del
      	</sql>
      	<select id="selectAll" parameterType="chauncy.entity.VideoInfo"
      		resultType="chauncy.entity.VideoInfo">
      		select a.id as id,a.video_name as videoName, a.video_html as videoHtml
      		,a.video_url as videoUrl, a.video_del as videoDel
      		, b.type_name as typeName
      		from video_info as a inner join video_type as b on a.video_type_id=b.id;
      	</select>
      </mapper>
      
    3. 静态资源访问404原因:
      需要在springMVC配置文件中配置静态资源。
       <!-- 设置允许静态资源访问 -->
      <mvc:resources mapping="/static/imgs/**" location="static/imgs/" />
      <mvc:resources mapping="/static/easyui/**" location="static/easyui/" />
      <mvc:resources mapping="/static/js/**" location="static/js/" />
      <mvc:resources mapping="/static/css/**" location="static/css/" />
      
  2. 整合MybatisPageHelper分页插件:
    1. 新增mybatis-config.xml文件:
      <?xml version="1.0" encoding="UTF-8" ?>
      <!DOCTYPE configuration
              PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
              "http://mybatis.org/dtd/mybatis-3-config.dtd">
      <configuration>
      	<!-- 配置分页插件 -->
      	<plugins>
      	    <!-- interceptor的取值,在4.2版本以前:com.github.pagehelper.PageHelper,4.2版本以后,因为改变了实现,取值为:com.github.pagehelper.PageInterceptor -->
      		<plugin interceptor="com.github.pagehelper.PageInterceptor">
      			<!-- 设置数据库类型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六种数据库,PageHelper4.0版本后会自动识别,不用进行配置-->
      			<!-- <property name="dialect" value="mysql" /> -->
      		</plugin>
      	</plugins>
      </configuration>
      
    2. 在applicationContext-dao.xml中Mybatis的Sql会话工厂加载mybatis-config.xml:
       <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 -->  
      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
          <property name="configLocation" value="classpath:spring/mybatis-config.xml" />  
      </bean>  
      
    3. 在Java代码中使用:
      package chauncy.controller;
      
      import javax.servlet.http.HttpServletRequest;
      import javax.servlet.http.HttpServletResponse;
      
      import org.springframework.beans.factory.annotation.Autowired;
      import org.springframework.stereotype.Controller;
      import org.springframework.web.bind.annotation.RequestMapping;
      
      import com.github.pagehelper.Page;
      import com.github.pagehelper.PageHelper;
      
      import chauncy.service.VideoInfoService;
      
      @Controller
      @RequestMapping("/VideoInfoController")
      public class VideoInfoController {
      	
      	@Autowired
      	private VideoInfoService videoInfoService;
      	
      	private static final String INDEXVIDEO="indexVideo";
      	
      	/**   
      	 * @methodDesc: 功能描述(查询所有视频)  
      	 * @author: ChauncyWang
      	 * @param: @param httpServletRequest
      	 * @param: @param httpServletResponse
      	 * @param: @return     
      	 * @returnType: String  
      	 */  
      	@RequestMapping("/indexVideo")
      	public String indexVideo(HttpServletRequest httpServletRequest,Integer pageIndex){
      		//页数,一定要在dao方法之前使用,第一个参数:页数,不是limit默认起始值0,默认为1,代表limit的0,第二个参数:参数。分页公式:(页数-1)*长度。
      		if(pageIndex == null){
      			pageIndex=1;
      		}
      		Page page = PageHelper.startPage(pageIndex, 2);
      		httpServletRequest.setAttribute("listVideo", videoInfoService.getVideoInfos(null));
      		//获取分页总数
      		httpServletRequest.setAttribute("pages", page.getPages());
      		return INDEXVIDEO;
      	}
      	
      }
      
    4. 在查询jsp页面中增加前端代码:
      <a style="font-size: 20px;" href="indexVideo?pageIndex=1">首页</a>
      <c:forEach begin="1" end="${pages}" var="p">
          <a style="font-size: 20px;" href="indexVideo?pageIndex=${p}">${p}</a>
      </c:forEach>
      <a style="font-size: 20px;" href="indexVideo?pageIndex=${pages}">尾页</a>
      
  3. 实现后台视频详情展示功能:
    1. 查询jsp页面详情按钮造成请求:
      <td><a href="getVideo?id=${p.id}"
      			style='text-decoration: none;'>预览视频</a></td>
      
    2. java代码处理请求返回详情页:
      package chauncy.controller;
      
      import javax.servlet.http.HttpServletRequest;
      import javax.servlet.http.HttpServletResponse;
      
      import org.springframework.beans.factory.annotation.Autowired;
      import org.springframework.stereotype.Controller;
      import org.springframework.web.bind.annotation.RequestMapping;
      
      import com.github.pagehelper.Page;
      import com.github.pagehelper.PageHelper;
      
      import chauncy.entity.VideoInfo;
      import chauncy.service.VideoInfoService;
      
      @Controller
      @RequestMapping("/VideoInfoController")
      public class VideoInfoController {
      	
      	@Autowired
      	private VideoInfoService videoInfoService;
      	
      	private static final String INDEXVIDEO="indexVideo";
      	private static final String VIDEODETAIL="videoDetail";
      	
      	/**   
      	 * @methodDesc: 功能描述(展示视频详情信息)  
      	 * @author: ChauncyWang
      	 * @param: @param request
      	 * @param: @param id
      	 * @param: @return   
      	 * @returnType: String  
      	 */  
      	@RequestMapping("/getVideo")
      	public String getVideo(HttpServletRequest request,Integer id){
      		VideoInfo videoInfo = videoInfoService.getVideoInfo(id);
      		request.setAttribute("videoInfo", videoInfo);
      		return VIDEODETAIL;
      	}
      }
      
      package chauncy.service;
      
      import java.util.List;
      
      import chauncy.entity.VideoInfo;
      
      public interface VideoInfoService {
      		public VideoInfo getVideoInfo(int id);
      }
      
      package chauncy.service.impl;
      
      import java.util.List;
      
      import org.springframework.beans.factory.annotation.Autowired;
      import org.springframework.stereotype.Service;
      
      import chauncy.dao.VideoInfoMapper;
      import chauncy.entity.VideoInfo;
      import chauncy.service.VideoInfoService;
      
      @Service
      public class VideoInfoServiceImpl implements VideoInfoService {
      	
      	@Autowired
      	private VideoInfoMapper videoInfoMapper;
      	
      	@Override
      	public VideoInfo getVideoInfo(int id) {
      		return videoInfoMapper.selectByPrimaryKey(id);
      	}
      }
      
    3. 详情页jsp嵌入第三方视频代码展示视频详情相关信息:
      <%@ page language="java" contentType="text/html; charset=utf-8"
          pageEncoding="utf-8"%>
      <!DOCTYPE html>
      <html>
      <head>
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <title>${videoInfo.videoName}</title>
      </head>
      <body>
          <h1>${videoInfo.videoName}</h1>
          <iframe src="${videoInfo.videoHtml} }" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true"> </iframe>
      </body>
      </html>
      
  4. 实现SpringMVC的上传图片功能:
    1. 在springmvc.xml中添加上传文件配置:
      <!-- 支持上传文件 -->
      <bean id="multipartResolver"
      class="org.springframework.web.multipart.commons.CommonsMultipartResolver" />
      
    2. 查询jsp页面添加资源按钮造成请求:
      <a href="jumpToAddVideoPage">添加资源</a>
      
    3. java代码处理请求返回添加视频页:
      package chauncy.controller;
      
      import javax.servlet.http.HttpServletRequest;
      import org.apache.log4j.Logger;
      import org.springframework.beans.factory.annotation.Autowired;
      import org.springframework.stereotype.Controller;
      import org.springframework.web.bind.annotation.RequestMapping;
      import chauncy.service.VideoTypeServive;
      
      @Controller
      @RequestMapping("/VideoInfoController")
      public class VideoInfoController {
      	@Autowired
      	private VideoTypeServive videoTypeServive;
      
      	private static final String ADDVIDEO="addVideo";
      
      	@RequestMapping("/jumpToAddVideoPage")
      	public String jumpToAddVideoPage(HttpServletRequest request){
      		request.setAttribute("listVideoType",videoTypeServive.getVideoTypes(null));
      		return ADDVIDEO;
      	}
      }
      
      <%@ page language="java" contentType="text/html; charset=utf-8"
          pageEncoding="utf-8"%>
      <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
      <!DOCTYPE html>
      <html>
      <head>
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <title>添加视频资源</title>
      </head>
      <body>
          <center>
              <h1>后台添加视频资源</h1>
              <form action="addVideo" style="font-size: 14px;" method="post"
                  ENCTYPE="multipart/form-data">
                  <table>
                      <tr>
                          <td>视频名称:</td>
                          <td><input type="text" name=videoName></td>
                      </tr>
                      <tr>
                          <td>视频类型:</td>
                          <td><select name="videoTypeId" style="width: 170px;">
                                  <c:forEach items="${listVideoType}" var="p">
                                      <option value="${p.id}">${p.typeName}</option>
                                  </c:forEach>
      
                          </select></td>
                      </tr>
                      <tr>
                          <td>B站播放URL:</td>
                          <td><textarea rows="10" cols="30" name="videoHtml"></textarea></td>
                      </tr>
                      <tr>
                          <td>上传封面:</td>
                          <td><input type="file" name="file"></td>
                      </tr>
                      <tr> <td colspan="2"><input type="submit" value="提交"></td></tr>
                  </table>
              </form>
          </center>
      </body>
      </html>
      
    4. 添加视频频请求的实现:
      package chauncy.controller;
      
      import java.io.File;
      import java.io.IOException;
      
      import javax.servlet.http.HttpServletRequest;
      import javax.servlet.http.HttpServletResponse;
      
      import org.apache.log4j.Logger;
      import org.springframework.beans.factory.annotation.Autowired;
      import org.springframework.stereotype.Controller;
      import org.springframework.web.bind.annotation.RequestMapping;
      import org.springframework.web.bind.annotation.RequestParam;
      import org.springframework.web.multipart.MultipartFile;
      
      import com.github.pagehelper.Page;
      import com.github.pagehelper.PageHelper;
      
      import chauncy.entity.VideoInfo;
      import chauncy.service.VideoInfoService;
      import chauncy.service.VideoTypeServive;
      
      @Controller
      @RequestMapping("/VideoInfoController")
      public class VideoInfoController {
      	private static Logger logger = Logger.getLogger(VideoInfoController.class);
      
      	@Autowired
      	private VideoInfoService videoInfoService;
      	@Autowired
      	private VideoTypeServive videoTypeServive;
      	
      	@RequestMapping("/addVideo")
      	public String addVideo(@RequestParam(value="file",required=false)MultipartFile file,VideoInfo videoInfo,HttpServletRequest request){
      		//file.getOriginalFilename();//文件的原生名称
      		String imageName=System.currentTimeMillis()+".png";//时间戳只是在单个JVM保证不重复,但是在分布式JVM会重复
      		//项目环境地质
      		String path=request.getSession().getServletContext().getRealPath("/static/imgs");
      		logger.info("path:"+path);
      		File targetFile = new File(path,imageName);
      		if(!targetFile.exists()){
      			targetFile.mkdirs();//创建文件夹
      			
      		}
      		try {
      			//保存图片
      			file.transferTo(targetFile);
      		} catch (Exception e) {
      			//打印日志一定要用e进行打印,不要用e.getMessage(),因为有时可能为空
      			logger.error("saveImagesError--------->"+e);
      			request.setAttribute("result", "上传图片失败!");
      			return ADDVIDEO;
      		}
      		videoInfo.setVideoUrl(imageName);
      		try {
      			//videoInfo.toString()中videoInfo可以允许为空,不抛异常,直接打印空
      			logger.info("###videoInfoService start... addVideo()###videoInfo:"+videoInfo.toString());
      			int addVideoResult = videoInfoService.addVideo(videoInfo);
      			//日志打印中={}表示对应一个参数,多个参数为:={},{}...逗号隔开
      			logger.info("###videoInfoService end... addVideo()###addVideoResult={}"+addVideoResult);
      			if(addVideoResult<=0){
      				request.setAttribute("result", "保存数据错误!");
      				return ADDVIDEO;
      			}
      			return "redirect:/VideoInfoController/indexVideo";
      		} catch (Exception e) {
      			//打印日志一定要用e进行打印,不要用e.getMessage(),因为有时可能为空
      			logger.error("videoInfoServiceAddVideoError--------->"+e);
      			request.setAttribute("result", "保存数据错误!");
      			return ADDVIDEO;
      		}
      	}
      }
      

四、扩展知识点:

  1. Mysql分页和Oracle分页有什么区别(SqlServer使用top分页,在此不列举)?
    Mysql分页使用limit,Oracle分页使用伪列rownum分页。
    1. limit分页
      limit m,n  m表示起始行,从0开始,n表示取几行。
      例:
      select * from stu limit m, n;
      
      limit 0,2  表示从第0行开始取两行
    2. rownum分页
      rownum只能比较小于,不能比较大于,因为rownum是先查询后排序的,例如查询条件为rownum>1,当查询到第一条数据,rownum为1,则不符合条件。第2、3…类似,一直不符合条件,所以一直没有返回结果。所以查询的时候需要设置别名,然后查询完成之后再通过调用别名进行大于的判断。
      例:
      select * from (
      select rownum rn,a.* from table_name a where rownum <= x
      //结束行,x = startPage*pageSize
      )
      where rn >= y; //起始行,y = (startPage-1)*pageSize+1
      
      >= y,<= x表示从第y行(起始行)~x行(结束行) 。
  2. 开发工程中异常处理注意:如果为MVC分层架构,不要在Service层中做异常处理,把异常抛到Controller进行处理。
一、项目简介 本项目是一套基于SSM视频播放网站,主要针对计算机相关专业的正在做毕设的学生和需要项目实战练习的Java学习者。 包含:项目源码、数据库脚本、软件工具、项目说明等,该项目可以直接作为毕设使用。 项目都经过严格调试,确保可以运行! 二、技术实现 ​后台框架:Spring、SpringMVC、MyBatis ​数据库:MySQL 开发环境:JDK、Eclipse、Tomcat 三、系统功能 该视频播放网站共包含两种角色:用户、管理员,主要分为前台和后台两大模块。 本系统主要包含了系统用户管理、站内新闻管理、收藏信息管理、收藏信息管理多个功能模块。下面分别简单阐述一下这几个功能模块需求。 1.管理员的登录模块:管理员登录系统对本系统其他管理模块进行管理。 2.用户的登录模块:用户登录本系统,对个人的信息等进行查询,操作可使用的功能。 3.用户注册模块:游客用户可以进行用户注册,系统会反馈是否注册成功。 4.添加管理员模块:向本系统中添加更多的管理人员,管理员包括普通管理员和超级管理员。 5.站内新闻管理模块: 站内新闻列表:将数据库的站内新闻表以列表的形式呈现给管理员。 添加站内新闻:实现管理员添加站内新闻。 修改站内新闻:实现管理员修改站内新闻。 6.视频类别管理模块: 视频类别列表:将数据库的视频类别表以列表的形式呈现给管理员。 添加视频类别:实现管理员添加视频类别。 修改视频类别:实现管理员修改视频类别。 7.收藏信息管理模块: 收藏信息列表:显示系统的所有收藏信息,可以通过关键字查询。 收藏信息删除:对输入错误或过期的收藏信息删除。 视频信息管理模块: 视频信息列表:显示系统的所有视频信息,可以通过关键字查询。 视频信息删除:对输入错误或过期的视频信息删除。 8.用户模块: 资料管理:用户登录本系统。可以对自己的个人主页进行查看。 系统信息:用户可以查看自己的系统提示信息。 修改资料:用户可以修改自己的账号密码。 信息搜索:用户可以通过关键字搜索站内信息。 密码修改:用户可以修改个人登录密码。 9.系统管理模块:包括数据备份。 10.退出模块: 管理员退出:管理员用来退出系统。 用户退出:用户用来退出系统。 该系统功能完善、界面美观、操作简单、功能齐全、管理便捷,具有很高的实际应用价值。
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