今天来使用eclipse实现一个简单的spring+springmvc+mybatis的整合。
整合的思路:
mybatis负责数据层,提供mapper接口;
springmvc提供controller,处理器映射器、适配器、视图解析器;
spring则负责管理springmvc编写的controller,所有的service、mybatis的SqlSessionFactory以及mapper;
所需的jar包:
mybatis的jar包
mybatis-spring整合jar包
spring的所有jar包,包括springmvc的包
数据库驱动的包
jstl包(springmvc默认支持jstl)
步骤:
1.首先新建一个web工程
2.编写mybatis的配置文件SqlMapConfig.xml,为模型层类定义别名,扫描mapper包下的mapper类和xml文件
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- 为模型层类定义别名 --> <typeAliases> <package name="site.wetsion.music.daomain"/> </typeAliases> <mappers> <package name="site。wetsion.music.mapper"/> </mappers> </configuration>
3.编写spring配置文件applicationContext.xml,加载db资源文件,注册数据库连接池以及SqlSessionFactory,扫描mapper下的包,对包下的mapper接口进行注册;注册service,注册事务管理器,声明事务控制
<!-- 加载db配置文件 --> <context:property-placeholder location="classpath:db.properties"/> <!-- 数据库连接池 --> <bean id="dataSourse" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> </bean> <bean id="sqlSessionFacctory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 数据源 --> <property name="dataSource" ref="dataSourse"/> <!-- mybatis配置文件 --> <property name="configLocation" value="classpath:SqlMapConfig.xml"/> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 配置要扫描的mapper的包 --> <property name="basePackage" value="site.wetsion.music.mapper"/> <property name="sqlSessionFactoryBeanName" value="sqlSessionFacctory"/> </bean> <bean id="userService" class="site.wetsion.music.service.UserService"/> <bean id="songService" class="site.wetsion.music.service.SongService"/> <!-- 事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSourse"/> </bean> <!-- 通知 --> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="save*" propagation="REQUIRED"/> <tx:method name="insert*" propagation="REQUIRED"/> <tx:method name="update*" propagation="REQUIRED"/> <tx:method name="delete*" propagation="REQUIRED"/> <tx:method name="find*" propagation="SUPPORTS" read-only="true"/> <tx:method name="select*" propagation="SUPPORTS" read-only="true"/> <tx:method name="get*" propagation="SUPPORTS" read-only="true"/> </tx:attributes> </tx:advice> <!-- aop --> <aop:config> <aop:advisor advice-ref="txAdvice" pointcut="execution(* site.wetsion.music.service.*.*(..))"/> </aop:config>
4.编写springmvc配置文件springmvc.xml,在该配置文件中,对controller包进行扫描,扫描其中的带有@Controller组件的类;再配置注解式处理器映射器和注解式适配器,配置视图解析器
<!-- 使用spring组件扫描 --> <context:component-scan base-package="site.wetsion.music.controller"/> <!-- 配置注解处理器映射器 --> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean> <!-- 配置注解适配器 --> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean> <!-- 配置视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"></bean>
5.在web.xml中配置前端控制器,spring容器监听器,字符过滤器
<!-- 配置spring容器监听器 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext-dao.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 前端控制器 --> <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:springmvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> <!-- 字符过滤器 --> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>