Spring--ssm整合(分)

最新推荐文章于 2024-09-16 14:26:40 发布

qq_26553781

最新推荐文章于 2024-09-16 14:26:40 发布

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本文链接：https://blog.youkuaiyun.com/qq_26553781/article/details/72759906

本文介绍如何整合Spring MVC与MyBatis框架，包括配置Web应用、搭建Spring MVC环境、整合MyBatis数据访问层等内容。通过示例演示如何进行数据库操作及事务管理。

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1 导入jar

导入spring(包含springmvc)，mybatis，mybatis-spring整合。数据库驱动，jstl，c3p0管理数据源，log4j.

2 配置web.xml入门文件

2.1 图解

2.2 加载Spring容器

<!-- 1.Spring容器 applicationContext.xml -->
   <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath*:applicationContext-*.xml</param-value>
   </context-param>
 
   <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
   </listener>

2.3 加载springmvc.xml

<!-- 2.Springmvc 前端控制器 -->
      <!-- 2.1 加载  springmvc.xml -->
   <servlet>
      <servlet-name>springDispatcherServlet</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>classpath:springmvc.xml</param-value>
      </init-param>
      <load-on-startup>1</load-on-startup>
   </servlet>
 
      <!-- 2.2 设置请求url -->
   <servlet-mapping>
      <servlet-name>springDispatcherServlet</servlet-name>
      <url-pattern>*.do</url-pattern>
   </servlet-mapping>
  
      <!-- 2.3 restful风格，过滤.do -->
   <servlet-mapping>
      <servlet-name>springDispatcherServlet</servlet-name>
      <url-pattern>/rest/*</url-pattern>
   </servlet-mapping>

2.4 编码过滤—springMVC自带

<!-- 3.编码过滤 -->
   <filter>
      <filter-name>characterEncoding</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>
   </filter>
 
   <filter-mapping>
      <filter-name>characterEncoding</filter-name>
      <url-pattern>/*</url-pattern>
   </filter-mapping>

2.5 Restfull处理各种类型请求转换

<!-- 4、使用Rest风格的URI，将页面普通的post请求转为指定的delete或者put请求 -->
   <filter>
      <filter-name>HiddenHttpMethodFilter</filter-name>
      <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
   </filter>
   <filter-mapping>
      <filter-name>HiddenHttpMethodFilter</filter-name>
      <url-pattern>/*</url-pattern>
   </filter-mapping>
   <filter>
      <filter-name>HttpPutFormContentFilter</filter-name>
      <filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>
   </filter>
   <filter-mapping>
      <filter-name>HttpPutFormContentFilter</filter-name>
      <url-pattern>/*</url-pattern>
   </filter-mapping>

3 springmvc.xml

3.1 图解

3.2 全局扫描—只扫描@Controller

<!-- 1. 扫描 -->
   <context:component-scan base-package="com.lan" use-default-filters="false">
      <!--只扫描控制器。@Controller -->
   </context:component-scan>

3.3 映射器适配器，处理json

<!--2. 两个标准配置 -->
   <!-- 将springmvc不能处理的请求交给tomcat -->
   <mvc:default-servlet-handler />
   <!-- 能支持springmvc更高级的一些功能，JSR303校验，快捷的ajax...映射动态请求 -->
   <mvc:annotation-driven />

3.4 视图解析器

<!--3. 配置视图解析器，方便页面返回 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/views/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>

4 applicationContext-dao.xml

4.1 图解

4.2 全局扫描--无

4.3 数据源

4.3.1 db.properties

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/e3mall-32?characterEncoding=utf-8
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=root

4.3.2 引入、加载数据源 alibaba

<!-- 2.数据源 -->
<!-- 2.1 引入-->
<context:property-placeholder location="classpath:db.properties" />

<!-- 2.2 加载 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
   <property name="url" value="${jdbc.jdbcUrl}"></property>
   <property name="driverClassName" value="${jdbc.driverClass}"></property>
   <property name="username" value="${jdbc.user}"></property>
   <property name="password" value="${jdbc.password}"></property>

   <property name="maxActive" value="10" />
   <property name="minIdle" value="5" />
</bean>

4.4 sqlSessionFactory

4.4.1 第一种

<!-- 3.sqlSessionFactory 配置和MyBatis的整合 -->
         <beanid="sqlSessionFactory"class="org.mybatis.spring.SqlSessionFactoryBean">
                   <!--3.1注入数据源 -->
                   <propertyname="dataSource" ref="dataSource"></property>
 
                   <!--3.2  指定mybatis   全局配置文件  -->
                   <propertyname="configLocation" value="classpath:sqlMapConfig.xml"></property>
 
                   <!--3.3指定mybatis，mapper文件的位置 -->
                   <propertyname="mapperLocations"value="classpath:mapper/*.xml"></property>
         </bean>

4.4.2 第二种在同包下

<!--3.sqlSessionFactory 配置和MyBatis的整合 -->
<bean id="sqlSessionFactory"class="org.mybatis.spring.SqlSessionFactoryBean">
   <!-- 3.1注入数据源 -->
   <property name="dataSource" ref="dataSource"></property>

   <!-- 3.2  指定mybatis   全局配置文件  -->
   <property name="configLocation"value="classpath:mybatis/SqlMapConfig.xml"/>

   <!-- 3.3指定mybatis，mapper文件的位置-->
   <!--<propertyname="mapperLocations"value="classpath:mapper/*.xml"></property>-->
</bean>

多一步pom加载xml

<build>
    <finalName>${project.artifactId}</finalName>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>

4.5 Mybatis

<!-- 4. 配置mybatis扫描器， -->
<!-- 4.1 将mybatis接口的实现加入到ioc容器中  dao接口 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
   <property name="basePackage" value="cn.e3mall.mapper"></property>
   <!-- 使用sqlSessionFactoryBeanName -->
   <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>

<!-- 4.2  (可选)配置一个可以执行批量的sqlSession -->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
   <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
   <constructor-arg name="executorType" value="BATCH"></constructor-arg>
</bean>

5 applicationContext-service.xml

<!-- 配置包扫描器 -->
<context:component-scan base-package="cn.e3mall.service"/>

6 applicationContext-trans.xml-事务

6.1 xml

<!-- 事务管理器 -->
<bean id="transactionManager"
   class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
   <!-- 数据源 -->
   <property name="dataSource" ref="dataSource" />
</bean>
<!-- 通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
   <tx:attributes>
      <!-- 传播行为 -->
      <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>
<!-- 切面 -->
<aop:config>
   <aop:advisor advice-ref="txAdvice"
      pointcut="execution(* cn.e3mall.service..*.*(..))" />
</aop:config>

6.2 注解

<!-- 5.事务控制 -->
	<!-- 5.1 声明事务 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!--注入数据源 -->
		<property name="dataSource" ref="dataSource"></property>
	</bean>

	<!-- 5.2 开启事务注解 -->
	<tx:annotation-driven transaction-manager="transactionManager" />

7 SqlMapConfig.xml—全局配置文件

<!-- 1.驮峰式命名规则 -->
   <settings>
      <setting name="mapUnderscoreToCamelCase" value="true" />
   </settings>
 
   <!-- 2.ognl实例类的别名 -->
   <typeAliases>
      <package name="com.lan.pojo" />
   </typeAliases>
 
   <!-- 3.（可选扩展）注册分页插件 -->
   <plugins>
      <plugin interceptor="com.github.pagehelper.PageInterceptor"></plugin>
   </plugins>

8 工程结构

9 Pom.xml

<properties>
    <file.encoding>UTF-8</file.encoding>
    <spring.version>4.3.7.RELEASE</spring.version>
    <mybatis.version>3.4.2</mybatis.version>
    <pagehelper.version>5.0.1</pagehelper.version>
    <mybatis-spring.version>1.3.1</mybatis-spring.version>
    <druid.version>1.0.9</druid.version>
    <mysql.version>5.1.40</mysql.version>
    <jstl.version>1.2</jstl.version>
    <servlet.version>3.1.0</servlet.version>
    <junit.version>4.12</junit.version>
  </properties>

  <dependencies>
    <!-- springMVC -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- spring jdbc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- spring aop  -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- spring单元测试 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
      <scope>test</scope>
    </dependency>

    <!-- mybatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>

    <!-- 引入Mybatis分页插件 -->
    <!-- 引入5.0版本在测试的时候会报错 4.2版本也会报错,总是出现String无法转换为某个对象的错误   -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>${pagehelper.version}</version>
    </dependency>

    <!-- mybatis与spring整合 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>${mybatis-spring.version}</version>
    </dependency>
    <!-- 数据库连接池 和驱动-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>${druid.version}</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>

    <!-- jstl junit servlet-api -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>${jstl.version}</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>${servlet.version}</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>${junit.version}</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

源代码文件：http://download.youkuaiyun.com/detail/qq_26553781/9852543

http://download.youkuaiyun.com/download/qq_26553781/10034223