springMVC代码整合

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本文详细介绍了一个基于SpringMVC、Spring和MyBatis(SSM)框架的小型项目搭建过程，包括pom.xml中的依赖配置、数据库连接配置、MyBatis配置、SpringMVC配置等关键步骤。

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spring MVC整合代码

pom.xml jar依赖

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!--servlet-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>
    <!--springmvc-->

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.8.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>5.2.8.RELEASE</version>
    </dependency>

    <!--jsp的jstl标签库支持-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>



    <!-- 事务的-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>
    <!--aspectj 依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>
    <!--jackson-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.0</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.10.3</version>
    </dependency>

    <!--mybatis 和 和 spring 整合的-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.1</version>
    </dependency>
    <!--mybatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.1</version>
    </dependency>
    <!--mysql 驱动-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.9</version>
    </dependency>
    <!--druid-->

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.10</version>
    </dependency>

    <!-- jsp 依赖 -->
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2.1-b03</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>

  <build>
    <resources>
      <resource>
        <directory>src/main/java</directory><!-- 所在的目录-->
        <includes><!-- 包括目录下的.properties,.xml 文件都会扫描到-->
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.1</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>

数据库配置文件 jdbc.properties

jdbc.driver=com.musql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/diid?useSSL=true&useUnicode=true&characterEncoding=utf8  ###
jdbc.user=...                                                       ###
jdbc.pwd=...                                                        ###

mybatis.xml

<?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>

    <!--日志开启-->
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING" />
    </settings>
    
    <!--  sql mapper（sql映射文件）的位置  -->
    <mappers>
        <!--  一个mapper标签指定一个文件的位置，从类路径开始的路径信息 从target/class开始      -->
        <!--扫描这个包下的所有dao.xml文件 -->
        
        
        <package name="com.vashon.dao"/>                               ###

    </mappers>
</configuration>

Dao.xml

<?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="com.vashon.dao.UserDao">                            ###
        <!--
	 id:唯一标识 mybatis会用这个id值来找要执行的sql语句
		可以自定义，但是要用接口中的方法名称
	
	resultType：表示执行sql后得到的java对象类型 
				写值的全限定名称org.example.doman.Student
-->
    <select id="selectUser" resultType="java.lang.String">             ###
  </select>
</mapper>
        <!--
            1. sql语句，mysql回执行这些sql语句
            2.  <!DOCTYPE mapper
                PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
                "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
                验证标签和属性是否符合要求
            3.mapper根标签 唯一必须
            namespace 叫做命名空间，唯一的，可自定义，要求使用接口的全限定名称
-->

springMVC-servlet.xml

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

    <!--注册组件扫描器 base-package:指定@Controller注解所在的包-->
    <context:component-scan base-package="com.vashon.controller"/>           ###

    <!--添加 处理映射器-->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
    <!--添加 处理解析器-->
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>

    <!--注册注解驱动-->
    <mvc:annotation-driven />
    <!--静态资源请求不经过-->
    <mvc:default-servlet-handler />
</beans>

applicationContext.xml

<?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:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!--注册组件扫描器 -->   <!--扫描这个包下注解的类，并生成对象-->
    <context:component-scan base-package="com.vashon.service" />       ###
    <context:component-scan base-package="com.vashon.entity" />        ###
    <!--//引用属性配置文件-->
    <context:property-placeholder location="classpath:jdbc.properties" />  ###
    <!--配置阿里的Druid数据库连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.user}"/>
        <property name="password" value="${jdbc.pwd}"/>
    </bean>
    <!--注册SqlSessionFactoryBean-->  <!--跟mybatis有关，可以使用Dao类-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>       <!--使用上面的连接池-->
        <property name="configLocation" value="classpath:mybatis.xml" />   ###          <!--写了mybatis配置文件的路径-->
    </bean>
    <!--动态代理对象-->
    <!--//创建dao对象，使用sqlsession的getMapper（StudentDao.class）
    // MapperScannerConfigurer:在内部调用getMapper()生成每个dao接口的代理对象。-->

    <bean class = "org.mybatis.spring.mapper.MapperScannerConfigurer">
       <!--指定sqlSessionFactoryBeanName，即sqlsession.getMapper(...class)。中的sqlSession-->
        <property name = "sqlSessionFactoryBeanName" value="sqlSessionFactory" />
        <!--sqlsession.getMapper(...class)。中的.class-->
        <!--指定包名，包名是dao接口所在的包名。mapperScannerConfigurer会扫描这个包所有的接口，把每个接口都执行一次，
        getMapper(.class)方法。得到这个接口的dao对象创建好的dao对象放入spring的容器中。对象名是接口名首字母小写，如StudentDao.java接口的对象studentDao-->
        <property name = "basePackage" value = "com.vashon.dao"/>    ###
    </bean>
    <!-- 配置事务管理器 -->
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
          p:dataSource-ref="dataSource" />

    <!-- 指明使用注解的方式来管理事务 -->
    <tx:annotation-driven transaction-manager="transactionManager" />
    <!--引入其他配置文件-->
	<import resource="spring-redis.xml">  ###
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                  http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0"
         metadata-complete="true">


  <context-param>
    <!-- //contextConfigLoaction表示配置文件的路径-->
    <param-name>contextConfigLocation</param-name>
    <!--//表示自定义spring配置文件的路径-->
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>


  <servlet>
    <servlet-name>mvc-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--关联一个springmvc的配置文件:【servlet-name】-servlet.xml-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springMVC-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
</web-app>