- 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:
dao层
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。
service层
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。
springmvc
springmvc是spring的模块,不需要整合。
- 整合Dao层
也就是Spring与MyBatis的整合
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
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:
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>