spring之事务管理

spring对事务的管理，有两种方式，分别是编程式事务和声明式事务，常用的是声明式的事务，采用声明式的事务包括配置文件的方式和注解的配置方式

1采用配置文件的方式

1.1类

public class User {    
private int id;
private String name;
private double money;
}

public class UserDao {
private JdbcTemplate jdbcTemplate;//注入jdbcTemplate
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
//增加钱
public void addMoney(){
String sql="update user set money=money-? where id=?";
jdbcTemplate.update(sql, -100,1);
}
//减少钱
public void subMoney(){
String sql="update user set money=money-? where id=?";
jdbcTemplate.update(sql,100,2);
}

}

public class UserService {
private UserDao userDao;
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}


public void addChang(){
userDao.addMoney();
//int i=1/0;
userDao.subMoney();
}
}

1.2配置文件

<!-- 配置数据库连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql:///txaop"></property>
<property name="user" value="root"></property>
<property name="password" value="root"></property>
</bean>
<!-- 创建bean -->
<bean id="userDao" class="cn.zy.tx.UserDao">
   <property name="jdbcTemplate" ref="jdbcTemplate"></property>
</bean>
<bean id="userService" class="cn.zy.tx.UserService">
  <property name="userDao" ref="userDao"></property>
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
  <property name="dataSource" ref="dataSource"></property>
</bean>
<!--配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 事务的配置增强 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
   <tx:attributes>
      <tx:method name="add*"/>
   </tx:attributes>
</tx:advice>
<!-- 事务切面的配置 -->
<aop:config>
    <aop:pointcut expression="execution(* cn.zy.tx.UserService.*(..))" id="point1"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="point1"/>
</aop:config>

1.3测试

@Test
public void test(){
ApplicationContext context=new ClassPathXmlApplicationContext("tx.xml");
UserService userService=(UserService)context.getBean("userService");
userService.addChang();
}

2采用注解的方式

与配置文件不同的地方主要在配置文件，以及需要加事务的地方加上@Transactional

配置文件

 <!-- 配置数据库连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql:///txaop"></property>
<property name="user" value="root"></property>
<property name="password" value="root"></property>
</bean>
<!-- 创建bean -->
<bean id="userDao" class="cn.zy.tx.UserDao">
   <property name="jdbcTemplate" ref="jdbcTemplate"></property>
</bean>
<bean id="userService" class="cn.zy.tx.UserService">
  <property name="userDao" ref="userDao"></property>
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
  <property name="dataSource" ref="dataSource"></property>
</bean>
<!--配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 开启事务注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/>

需要加事务的类

@Transactional
public class UserService {
private UserDao userDao;
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}


public void addChang(){
userDao.addMoney();
//int i=1/0;
userDao.subMoney();
}
}
public class UserService {
private UserDao userDao;
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}


public void addChang(){
userDao.addMoney();
//int i=1/0;
userDao.subMoney();
}
}

@Transactional
public class UserService {
private UserDao userDao;
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}


public void addChang(){
userDao.addMoney();
//int i=1/0;
userDao.subMoney();
}
}