SSM整合

一，导入jar包

jar包和入手项目下载地址：

二，把applicationContext.xml放到WEB-INF下 配置数据库相关参数

<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"    xsi:schemaLocation="http://www.springframework.org/schema/beans     http://www.springframework.org/schema/beans/spring-beans-2.0.xsd    http://www.springframework.org/schema/context     http://www.springframework.org/schema/context/spring-context-2.5.xsd">    <context:property-placeholder location="classpath:app.properties" />    <!--创建jdbc数据源 -->    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"        destroy-method="close">        <property name="driverClassName" value="${driver}" />        <property name="url" value="${url}" />        <property name="username" value="${username}" />        <property name="password" value="${password}" />        <property name="maxActive" value="${maxActive}" />        <property name="maxIdle" value="${maxIdle}" />        <property name="maxWait" value="${maxWait}" />    </bean>    <!-- 创建SqlSessionFactory，同时指定数据源 -->    <!-- SqlSessionFactoryBean相当于SqlSessionFactoryBuilder -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="dataSource" />        <!-- 指定mybtis总配置文件，订制的environment在spring容器中不在生效 -->        <property name="configLocation" value="classpath:conf.xml" />    </bean>    <!--SqlSessionTemplate 是对SqlSession接口的一个实现 以前使用纯mybatis时 使用的是DefaultSqlSession这个类 -->    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">        <constructor-arg index="0" ref="sqlSessionFactory" />    </bean>    <bean id="userDaoImpl" class="com.dao.impl.UserDaoImpl">        <property name="session" ref="sqlSession" />    </bean>    <bean id="userService" class="com.service.impl.UserServiceImpl">        <property name="dao" ref="userDaoImpl" />    </bean></beans>

三，在web.xml中配置SpringMVC参数和一个监听器 ContextLoaderListener

<?xml version="1.0" encoding="UTF-8"?><web-app id="WebApp_ID" version="2.4"    xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">    <display-name>SSM</display-name>    <welcome-file-list>        <welcome-file>index.jsp</welcome-file>    </welcome-file-list>    <!-- 第三步: 配置前端控制器 DispatcherServlet -->    <servlet>        <servlet-name>springmvc</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <!-- 如果不配置contextConfigLocation 默认读取的是 WEB-INF/servlet名-servlet.xml(也就是springmvc-servlet.xml)             这个文件 -->        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:springmvc.xml</param-value>        </init-param>    </servlet>    <servlet-mapping>        <servlet-name>springmvc</servlet-name>        <!-- *.action 客户端发出*.action的请求时 被控制器处理 -->        <url-pattern>*.action</url-pattern>    </servlet-mapping>    <listener>        <listener-class>            org.springframework.web.context.ContextLoaderListener        </listener-class>    </listener></web-app>

四，配置userMapper

<?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.po.userMapper">    <insert id="addUser" parameterType="User">        insert into user values(null,#{name},#{age});    </insert></mapper>

五，配置 conf.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>    <settings>        <setting name="mapUnderscoreToCamelCase" value="true" />        <!--打开延迟加载的开关 -->        <setting name="lazyLoadingEnabled" value="true" />        <!--将积极加载改为消极加载及按需加载 -->        <setting name="aggressiveLazyLoading" value="false" />    </settings>    <typeAliases>        <!-- <typeAlias type="com.po.User" alias="_User"/> -->        <package name="com.po" />    </typeAliases>    <mappers>        <mapper resource="com/po/userMapper.xml" />    </mappers></configuration>

写dao，service，controller

最后配springmvc.xml

<bean class="com.controller.UserController">    <property name="userService" ref="userService"></property></bean>