SpringMVC学习笔记(二) --- SpringMVC整合MyBatis

整合目标：控制层采用springmvc、持久层使用mybatis实现。

jar包：包括：spring（包括springmvc）、mybatis、mybatis-spring整合包、数据库驱动、第三方连接池。

整合思路：

Dao层：
    1、SqlMapConfig.xml，空文件即可。需要文件头。
    2、applicationContext-dao.xml。
        a)	数据库连接池
        b)	SqlSessionFactory对象，需要spring和mybatis整合包下的。
        c)	配置mapper文件扫描器。
Service层：
    1、applicationContext-service.xml包扫描器，扫描@service注解的类。
    2、applicationContext-trans.xml配置事务。
表现层：
    Springmvc.xml
    1、包扫描器，扫描@Controller注解的类。
    2、配置注解驱动。
    3、视图解析器
Web.xml
    配置前端控制器。

步骤一：在classpath下创建sqlMapConfig.xml

<?xmlversion="1.0"encoding="UTF-8"?>
<!DOCTYPEconfiguration PUBLIC"-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
</configuration>

步骤二：在classpath下创建applicationContext-dao.xml,配置数据源、配置SqlSessionFactory、mapper扫描器

<?xml version="1.0"encoding="UTF-8"?>
<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">

	<!-- 加载配置文件 -->
	<context:property-placeholder location="classpath:db.properties"/>
	<!-- 数据库连接池 -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<propertyname="driverClassName"value="${jdbc.driver}"/>
		<propertyname="url"value="${jdbc.url}"/>
		<propertyname="username"value="${jdbc.username}"/>
		<propertyname="password"value="${jdbc.password}"/>
		<propertyname="maxActive"value="10"/>
		<propertyname="maxIdle"value="5"/>
	</bean>
	<!-- mapper配置 -->
	<!-- 让spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->
	<bean id="sqlSessionFactory"class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 数据库连接池 -->
		<property name="dataSource" ref="dataSource"/>
		<!-- 加载mybatis的全局配置文件 -->
		<property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml"/>
	</bean>
	<!-- 配置Mapper扫描器 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="springmvc.mapper"/>
	</bean>

</beans>

Db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/springmvc?characterEncoding=utf-8
jdbc.username=root
jdbc.password=root

步骤三：创建applicationContext-service.xml

<?xml version="1.0"encoding="UTF-8"?>
<beansxmlns="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">

	<!--配置包扫描器，扫描@service注解的类-->
    <context:component-scan base-package="springmvc.service"/>

</beans>

步骤四：创建applicationContext-transaction.xml,配置事务

<?xml version="1.0"encoding="UTF-8"?>
<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 -->
	<beanid="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 数据源 -->
		<propertyname="dataSource" ref="dataSource"/>
	</bean>
	<!-- 通知 -->
	<tx:adviceid="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="delete*" propagation="REQUIRED"/>
			<tx:method name="update*" propagation="REQUIRED"/>
			<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
			<tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
		</tx:attributes>
	</tx:advice>
	<!-- 切面 -->
	<aop:config>
		<aop:advisoradvice-ref="txAdvice"
			pointcut="execution(* springmvc.service.*.*(..))"/>
	</aop:config>
</beans>

步骤五：创建SpringMVC.xml，配置包扫描器，扫描@Controller注解的类、配置注解驱动，扫描@RequestMapping等标签、视图解析器；

<?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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

	<!-- 扫描带Controller注解的类 -->
	<context:component-scan base-package="springmvc.controller"/>
	<!-- 加载注解驱动 -->
	<mvc:annotation-driven/>
	<!-- 视图解析器 -->
	<beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<propertyname="viewClass"
			value="org.springframework.web.servlet.view.JstlView"/>
		<!-- jsp前缀 -->
		<propertyname="prefix"value="/WEB-INF/jsp/"/>
		<!-- jsp后缀 -->
		<propertyname="suffix"value=".jsp"/>
	</bean>
</beans>

步骤六：创建web.xml,配置前端控制器

<?xml version="1.0"encoding="UTF-8"?>
<web-appxmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	id="WebApp_ID"version="2.5">
	<display-name>springmvc-web</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	<!-- 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>
	
	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring/springmvc.xml</param-value>
		</init-param>
	</servlet>
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>*.action</url-pattern>
	</servlet-mapping>
</web-app>

1、Service由spring管理

2、spring对Service进行事务控制。

测试代码：

//ItemService接口
public interface ItemService {
	List<Items> getItemsList();
}

@Service
public class ItemServiceImpl implements ItemService {

	@Autowired
	private ItemMapper itemMapper;
	
	@Override
	public List<Items> getItemsList() {
		List<Items>itemList = itemMapper.getItemList();
		returnitemList;
	}

}

@Controller
public class ItemController {

	@Autowired
	private ItemService itemService;
	
	@RequestMapping("/itemList")
	public ModelAndView getItemList() {
		List<Items> list = itemService.getItemsList();
		ModelAndView modelAndView = new ModelAndView();
		modelAndView.addObject("itemList", list);
		modelAndView.setViewName("itemList");
		return modelAndView;
	}
}

访问：http://localhost:8080/springmvc-web/itemList.action

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SpringMVC学习笔记(二) --- SpringMVC整合MyBatis

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