Spring事务管理（基于@Transactional注解）

野性酷女 2022-05-21 06:55 258阅读 0赞

##### 【例子】银行转账 #####

##### 一、创建相关类 #####

AccountBiz类

package com.tx;
    public class AccountBiz {
    	private AccountDao accountDao;
    	public void setAccountDao(AccountDao accountDao) {
    		this.accountDao = accountDao;
    	}
    	//银行转账
    	public void transfer(){
    		accountDao.transfer();
    	}
    }

AccountDao类

package com.tx;
    import org.springframework.jdbc.core.JdbcTemplate;
    import org.springframework.transaction.annotation.Transactional;
    //使用@Transactional注解实现事务管理
    @Transactional
    public class AccountDao {
    	private JdbcTemplate jdbcTemplate;
    	public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
    		this.jdbcTemplate = jdbcTemplate;
    	}
    	//银行转账
    	public void transfer(){
    		add();
    		int i=10/0;
    		reduce();		
    	}
    	//增加余额
    	public void add(){
    		String sql="update account set balance=balance+? where accountNo=?";
    		jdbcTemplate.update(sql, 500,655925);
    	}
    	//减少余额
    	public void reduce(){
    		String sql="update account set balance=balance-? where accountNo=?";
    		jdbcTemplate.update(sql, 500,358788);
    	}
    }

Test类

package com.tx;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    public class Test {
    	public static void main(String[] args) {
    		//加载配置Spring-tx.xml
    		ApplicationContext context=new ClassPathXmlApplicationContext("Spring-tx.xml");
    		//获取accountBiz实例
    		AccountBiz accountBiz=(AccountBiz) context.getBean("accountBiz");
    		//银行转账
    		accountBiz.transfer();
    	}
    }

##### 二、配置Spring-tx.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:aop="http://www.springframework.org/schema/aop"       
            xmlns:tx="http://www.springframework.org/schema/tx" 
            xmlns:context="http://www.springframework.org/schema/context"
            xsi:schemaLocation="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.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> 
    
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
      <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
      <property name="url" value="jdbc:mysql:///spring_demo"/>
      <property name="username" value="root"/>
      <property name="password" value="root"/>  
    </bean>  
    
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    		<property name="dataSource" ref="dataSource" />
    </bean>
    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    	<property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <tx:annotation-driven transaction-manager="transactionManager"/>
    
    <bean id="accountBiz" class="com.tx.AccountBiz">
    	<property name="accountDao" ref="accountDao"></property>
    </bean>
    <bean id="accountDao" class="com.tx.AccountDao">
    	<property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>
    </beans>

运行结果：

![70][]

![70 1][]

[70]: /images/20220521/46268cf0dfd74f78b855e80ff13f214c.png
[70 1]: /images/20220521/bcd1b0fe36d349b8aea6b54c3914552e.png