User.mapper.xml这个配置文件采用注解的形式
UserDao:
public interface UserDao { public List<User> selectAll(); }
UserMapper.java这里采用注解的形式
public interface UserMapper { @Select("select * from user") public List<User> selectAll(); }
当采用注解的形式:mybatis的全局配置文件的映射文件应该修改:
<?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> <!-- 设置别名 --> <typeAliases> <package name="cn.xst.vo"/> </typeAliases> <!-- 加入mapper的映射文件(注解的形式采用package的形式扫描) --> <mappers> <package name="cn.xst.dao.UserMapper"/> </mappers> </configuration>
UserDaoImpl.java
public class UserDaoImpl implements UserDao{ private UserMapper userMapper; public void setUserMapper(UserMapper userMapper) { this.userMapper = userMapper; } @Override public List<User> selectAll() { return userMapper.selectAll(); } }
Spring容器的IOC容器
<?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:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd"> <!-- 配置数据源 --> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver"></property> <property name="url" value="jdbc:mysql://127.0.0.1:3306/webservice"></property> <property name="username" value="root"></property> <property name="password" value="sorry"></property> </bean> <!-- 1.配置事物管理 --> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 2.配置事物的通知 --> <tx:advice id="txadvice" transaction-manager="txManager"> <tx:attributes> <!-- 配置哪些方法使用什么样的事物,配置事物的传播特性 --> <tx:method name="add" propagation="REQUIRED" /> <tx:method name="update" propagation="REQUIRED" /> <tx:method name="delete" propagation="REQUIRED" /> <tx:method name="remove*" propagation="REQUIRED" /> <tx:method name="insert" propagation="REQUIRED" /> <tx:method name="get" read-only="true" /> <tx:method name="*" propagation="REQUIRED" /> </tx:attributes> </tx:advice> <!-- 3.配置事物的切面 --> <aop:config> <aop:pointcut expression="execution(* cn.xst.dao.impl.*.*(..))" id="pointcut" /> <aop:advisor advice-ref="txadvice" pointcut-ref="pointcut" /> </aop:config> <!-- 配置mybatis的SqlSessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <!-- mybatis的全局配置文件 --> <property name="configLocation" value="classpath:mybatis.cfg.xml"></property> </bean> <!-- UserMapper --> <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"> <property name="mapperInterface" value="cn.xst.dao.UserMapper"></property> <property name="sqlSessionFactory" ref="sqlSessionFactory"></property> </bean> <!-- dao里面需要注入sqlSessionFactory --> <bean id="userDao" class="cn.xst.dao.impl.UserDaoImpl"> <property name="userMapper" ref="userMapper"></property> </bean> </beans>
对上述的代码测试:
public class Test { public static void main(String[] args) { ApplicationContext app = new ClassPathXmlApplicationContext("beans.xml"); UserDao userDao = (UserDao) app.getBean("userDao"); List<User> list = userDao.selectAll(); for (User user : list) { System.out.println(user); } } }
