工程结构：  SqlMapConfig.xml ~~~ <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- 开启延迟加载 --> <settings> <setting name="lazyLoadingEnabled" value="true"/> <setting name="aggressiveLazyLoading" value="false"/> <!-- 开启二级缓存 --> <setting name="cacheEnabled" value="true"/> </settings> <typeAliases> <package name="com.neuedu.model.po"/> </typeAliases> <mappers> <package name="com.neuedu.model.mapper"/> </mappers> </configuration> ~~~ springmvc.xml ~~~ <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" 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-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd"> <!-- 开启注解驱动 --> <mvc:annotation-driven></mvc:annotation-driven> <!-- 配置控制器包扫描 --> <context:component-scan base-package="com.neuedu.controllers"></context:component-scan> <!-- 配置静态资源的访问 --> <mvc:default-servlet-handler/> <!-- 配置二进制提交方式，配置文件上传组件 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 设置上传文件的最大尺寸为5MB --> <property name="maxUploadSize"> <value>5242880</value> </property> </bean> </beans> ~~~ applicationContext.xml ~~~ <?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd"> <!-- 配置数据源 --> <bean id="ds" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/mydb"/> <property name="username" value="root" /> <property name="password" value="root" /> </bean> <!-- 配置session工厂 --> <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 加载mybatis的主配置文件 --> <property name="configLocation" value="classpath:SqlMapConfig.xml"/> <!-- 注入数据源 --> <property name="dataSource" ref="ds" /> </bean> <!-- 配置service --> <context:component-scan base-package="com.neuedu.model.service"></context:component-scan> <!-- 配置mapper --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 指定扫描的包名 如果扫描多个包，每个包中间使用半角逗号分隔 --> <property name="basePackage" value="com.neuedu.model.mapper"/> <!-- 自动创建session（connection）去数据库交互 --> <property name="sqlSessionFactoryBeanName" value="sessionFactory"/> </bean> <!-- 事务处理 --> <!-- 配置service不需要实现接口 --> <aop:aspectj-autoproxy proxy-target-class="true"/> <!-- 声明事务管理器 --> <bean id="txm" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="ds"></property> </bean> <!-- 设置事务的传播特性 --> <tx:advice id="txAdvice" transaction-manager="txm"> <tx:attributes> <tx:method name="save*" propagation="REQUIRED"/> <tx:method name="update*" propagation="REQUIRED"/> <tx:method name="delete*" propagation="REQUIRED"/> <tx:method name="select*" propagation="SUPPORTS" read-only="true"/> </tx:attributes> </tx:advice> <!-- 设置advisor,切入点 --> <aop:config> <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.neuedu.model.service.*.*(..))"/> </aop:config> </beans> ~~~ web.xml ~~~ <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns: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_3_0.xsd" version="3.0"> <display-name>TestSSM</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> <!-- 配置springmvc的前端控制器 --> <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>/</url-pattern> </servlet-mapping> <!-- 配置过滤器，解决乱码问题 --> <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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 配置监听器，启动spring容器 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> </web-app> ~~~