SpringMVC学习--springmvc和mybatis整合
简介
springMVC是表现层，service充当业务层，mybatis作为持久层，通过spring将这三层整合起来。如下图：
第一步：整合dao层
mybatis和spring整合，通过spring管理mapper接口。使用mapper的扫描器自动扫描mapper接口在spring中进行注册。
第二步：整合service层
通过spring管理 service接口，使用配置方式将service接口配置在spring配置文件中，实现事务控制。
第三步：整合springmvc
由于springmvc是spring的模块，不需要整合。
整合Dao层
也就是Spring与MyBatis的整合【源码下载地址】
1、MyBatis的配置：SqlMapConfig.xml
1 <configuration> 2 <typeAliases> 3 <!-- 批量别名定义，扫描整个包下的类，别名为类名（首字母大写或小写都可以） --> 4 <package name="com.luchao.pojo" /> 5 </typeAliases> 6 </configuration>
2、Dao的配置：applicationContext-dao.xml
配置数据源、SqlSessionFactory、Mapper扫描器
1 <beans xmlns="http://www.springframework.org/schema/beans"
2 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
3 xmlns:context="http://www.springframework.org/schema/context"
4 xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
5 xsi:schemaLocation="http://www.springframework.org/schema/beans
6 http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
7 http://www.springframework.org/schema/mvc
8 http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
9 http://www.springframework.org/schema/context
10 http://www.springframework.org/schema/context/spring-context-3.2.xsd
11 http://www.springframework.org/schema/aop
12 http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
13 http://www.springframework.org/schema/tx
14 http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
15 <!-- 加载配置文件 -->
16 <context:property-placeholder location="classpath:db.properties" />
17 <!-- 数据源，使用dbcp -->
18 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
19 destroy-method="close">
20 <property name="driverClassName" value="${jdbc.driver}" />
21 <property name="url" value="${jdbc.url}" />
22 <property name="username" value="${jdbc.username}" />
23 <property name="password" value="${jdbc.password}" />
24 <property name="maxActive" value="10" />
25 <property name="maxIdle" value="5" />
26 </bean>
27 <!-- sqlSessinFactory -->
28 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
29 <!-- 加载mybatis的配置文件 -->
30 <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />
31 <!-- 数据源 -->
32 <property name="dataSource" ref="dataSource" />
33 </bean>
34 <!-- 配置mapper扫描器 -->
35 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
36 <property name="basePackage" value="com.luchao.mapper"></property>
37 <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
38 </bean>
39 </beans>
3、定于Po、Mapper接口和Mapper映射文件。
整合Service
让spring管理service
定于service接口：
1 public interface ItemsService {2 // 获取商品列表
3 public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo)4 throws Exception;5 }
service实现类：
1 public class ItemsServiceImpl implements ItemsService { 2
3 @Autowired 4 private ItemsMapperCustom itemsMapperCustom; 5
6 @Override 7 public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) 8 throws Exception { 9 // 通过itemsMapperCustom查询数据库
10 return itemsMapperCustom.findItemsList(itemsQueryVo);11 }12 }
在spring容器中中配置service：applicationContext-service.xml
1 <bean id="itemsService" class="com.luchao.service.ItemsServiceImpl"></bean>
事务控制：applicationContext-transaction.xml
1 <beans xmlns="http://www.springframework.org/schema/beans" 2 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" 3 xmlns:context="http://www.springframework.org/schema/context" 4 xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 5 xsi:schemaLocation="http://www.springframework.org/schema/beans 6 http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 7 http://www.springframework.org/schema/mvc 8 http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 9 http://www.springframework.org/schema/context 10 http://www.springframework.org/schema/context/spring-context-3.2.xsd 11 http://www.springframework.org/schema/aop 12 http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 13 http://www.springframework.org/schema/tx 14 http://www.springframework.org/schema/tx/spring-tx-3.2.xsd "> 15 <!-- 事务管理器 对mybatis操作数据库事务控制，spring使用jdbc的事务控制类 --> 16 <bean id="transactionManager" 17 class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 18 <!-- 数据源 dataSource在applicationContext-dao.xml中配置了 --> 19 <property name="dataSource" ref="dataSource" /> 20 </bean> 21 22 <!-- 通知 --> 23 <tx:advice id="txAdvice" transaction-manager="transactionManager"> 24 <tx:attributes> 25 <tx:method name="save*" propagation="REQUIRED"/> 26 <tx:method name="delete*" propagation="REQUIRED"/> 27 <tx:method name="insert*" propagation="REQUIRED"/> 28 <tx:method name="update*" propagation="REQUIRED"/> 29 <tx:method name="find*" propagation="REQUIRED" read-only="true"/> 30 <tx:method name="get*" propagation="REQUIRED" read-only="true"/> 31 <tx:method name="select*" propagation="REQUIRED" read-only="true"/> 32 </tx:attributes> 33 </tx:advice> 34 <!-- aop --> 35 <aop:config> 36 <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.luchao.service.*.*(..))"/> 37 </aop:config> 38 </beans>
通过AOP将事务织入了符合一定条件的方法上面。
整合springMVC
配置处理器映射器、适配器、视图解析器:springmvc.xml
1 <beans xmlns="http://www.springframework.org/schema/beans" 2 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" 3 xmlns:context="http://www.springframework.org/schema/context" 4 xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 5 xsi:schemaLocation="http://www.springframework.org/schema/beans 6 http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 7 http://www.springframework.org/schema/mvc 8 http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 9 http://www.springframework.org/schema/context 10 http://www.springframework.org/schema/context/spring-context-3.2.xsd 11 http://www.springframework.org/schema/aop 12 http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 13 http://www.springframework.org/schema/tx 14 http://www.springframework.org/schema/tx/spring-tx-3.2.xsd "> 15 <!-- 扫描controller注解,多个包中间使用半角逗号分隔 --> 16 <context:component-scan base-package="com.luchao.controller"/> 17 <mvc:annotation-driven/> 18 <!-- 视图解析器 --> 19 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 20 <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> 21 <property name="prefix" value="/WEB-INF/jsp/"/> 22 <property name="suffix" value=".jsp"/> 23 </bean> 24 </beans>
配置前端控制器：web.xml中加入：
1 <servlet> 2 <servlet-name>springmvc</servlet-name> 3 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 4 <init-param> 5 <param-name>contextConfigLocation</param-name> 6 <param-value>classpath:spring/springmvc.xml</param-value> 7 </init-param> 8 <load-on-startup>1</load-on-startup> 9 </servlet> 10 <servlet-mapping> 11 <servlet-name>springmvc</servlet-name> 12 <url-pattern>/</url-pattern> 13 </servlet-mapping>
编写控制器：
1 @Controller 2 @RequestMapping("/items") 3 public class ItemController { 4 @Autowired 5 private ItemsService itemsService; 6
7 // 商品查询
8 @RequestMapping("/queryItems") 9 public ModelAndView queryItems() throws Exception {10 // 调用service查找 数据库，查询商品列表
11 List<ItemsCustom> itemsList = itemsService.findItemsList(null);12
13 // 返回ModelAndView
14 ModelAndView modelAndView = new ModelAndView();15 // 相当 于request的setAttribut，在jsp页面中通过itemsList取数据
16 modelAndView.addObject("itemsList", itemsList);17
18 // 指定视图
19 // 下边的路径，如果在视图解析器中配置jsp路径的前缀和jsp路径的后缀，修改为
20 // modelAndView.setViewName("/WEB-INF/jsp/items/itemsList.jsp");
21 // 上边的路径配置可以不在程序中指定jsp路径的前缀和jsp路径的后缀
22 modelAndView.setViewName("items/itemsList");23
24 return modelAndView;25 }26 }
加载spring容器：
将mapper、service、controller加载到spring容器中。在web.xml中，添加spring容器监听器，加载spring容器。
1 <!-- 加载spring容器 --> 2 <context-param> 3 <param-name>contextConfigLocation</param-name> 4 <param-value>/WEB-INF/classes/spring/applicationContext-*.xml</param-value> 5 </context-param> 6 <listener> 7 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 8 </listener>