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);
}
}
}