SSM_Spring&SpringMVC&MyBatis基于xml的框架整合

1. 导入依赖

<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.aowin.spring</groupId>
	<artifactId>spring-mybatis</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>

	<!-- 自定义属性 -->
	<properties>
		<spring.version>5.1.12.RELEASE</spring.version>
		<mybatis.version>3.4.6</mybatis.version>
	</properties>

	<dependencies>

		<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>${mybatis.version}</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>2.0.3</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-dbcp2 -->
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-dbcp2</artifactId>
			<version>2.7.0</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/log4j/log4j -->
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.17</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.10.1</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper -->
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper</artifactId>
			<version>5.1.11</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.47</version>
		</dependency>
	</dependencies>
</project>

2. 配置Web.xml

DispatcherServlet

1. 初始化servlet的ioc容器对象 负责创建web层相关的对象
2. 负责分发请求

ContextLoaderListener

初始化root的ioc容器 负责创建service、mapper、sqlSessionFactory、dataSource、事务等相关对象

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
	<!-- 配置前端控制器
		默认加载 /WEB-INF/springDispatcherServlet-servet.xml配置文件
	 -->
	<servlet>
		<servlet-name>springDispatcherServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>springDispatcherServlet</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	<!-- 
		配置监听器 默认加载 /WEB-INF/applicationContext.xml 
	-->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
</web-app>

3. 配置servlet的ioc容器

<?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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

	<mvc:default-servlet-handler/>
	<mvc:annotation-driven></mvc:annotation-driven>
	<context:component-scan base-package="com.test.controller"></context:component-scan>

</beans>

4. 配置root的ioc容器

<?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:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

	<!-- 第一步 配置DataSource对象 class - 只要是DataSource的实现类都可以 -->
	<!-- 加载别的配置文件 -->
	<context:property-placeholder
		location="classpath:jdbc.properties" />
	<bean id="dataSource"
		class="org.apache.commons.dbcp2.BasicDataSource">
		<property name="url" value="${url}"></property>
		<property name="username" value="${username_}"></property>
		<property name="password" value="${password}"></property>
		<property name="driverClassName" value="${driver}"></property>
		<property name="maxTotal" value="${maxTotal}"></property>
	</bean>
	
	<!-- 第二步 创建SqlSessionFactory   
		该配置的class对应的是一个FactoryBean类 ，该id对应的对象是SqlSessionFactoryBean对象的getObject方法返回的对象
	 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 设置mybatis配置文件的路径 可选的 -->
		<property name="configLocation" value="classpath:mybatis-config.xml"></property>
		<property name="dataSource" ref="dataSource"></property>
		<!-- 配置mapper.xml文件的路径
			可以省略 默认mapper和mapper映射文件 同名同包
		 -->
		<!-- <property name="mapperLocations" value="classpath:com/test/dao/*Mapper.xml"></property> -->
	</bean>
	
	<!--  第三步 创建Mapper接口的代理对象
		创建的对象的名字 都是接口名首字母变小写
	 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!-- 设置mapper接口所在的包 -->
		<property name="basePackage" value="com.test.dao"></property>
	</bean>
	
	<!-- 第四步  创建Service -->
	<context:component-scan base-package="com.test.service.impl"></context:component-scan>
	
	<!-- 第五步 配置事务 -->
	<!-- 配置事务管理器对象 该对象负责事务的开启 提交 以及回滚 关闭的操作 -->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"></property>
	</bean>
	
	<!-- 事务配置的简写 事务同样使用注解去配置 
		方法上添加 @Transactional
	
	 -->
	<tx:annotation-driven transaction-manager="transactionManager"/>
	
</beans>