Spring事务当中propagation=“REQUIRED“和PROPAGATION=“REQUIRES_NEW“的区别

3.propagation="REQUIRED"和PROPAGATION="REQUIRES_NEW"的区别  

（官方）PROPAGATION_REQUIRED--支持当前事务，如果当前没有事务，就新建一个事务。这是最常见的选择。
PROPAGATION_REQUIRES_NEW--新建事务，如果当前存在事务，把当前事务挂起。

马克-to-win：当两个不同的pointcut之间涉及调用方法时，就涉及到事务传播属性。比如上面的方法updateRegister，如果它的属性是PROPAGATION_REQUIRED，则它会和调用它的方法login同属一个事务，如果是REQUIRES_NEW，则在不同的事务。当updateRegister已经提交之后updateRegisterWrong发生错误的时候，如果是REQUIRES_NEW，则updateRegister不会回滚，而如果是REQUIRED，则会回滚。注意下例，我们把两个方法故意放在两个pointcut里。看一下程序把REQUIRED变成REQUIRES_NEW以后的区别。

例 2.3.1

package service;
import java.sql.Types;
import javax.annotation.Resource;
import org.springframework.jdbc.core.JdbcTemplate;
import com.INiutDAO;
import service.interfac.ILoginService;

public class LoginServiceImpl implements ILoginService {
    @Resource
    private JdbcTemplate jt;
    private INiutDAO iNiutDAO;
    public void setINiutDAO(INiutDAO iNiutDAO) {
        this.iNiutDAO = iNiutDAO;
    }
    public void login() {
        iNiutDAO.daoUpdateRegister(13,1);
        System.out.println("successfully update 1");
        updateRegisterWrong(19,2);
        System.out.println("successfully update 2");
    }    
    public void updateRegisterWrong(int age,int id) {
        String sql = "UPDATE register SET age=? WWWWWWW id=?";
        Object params[] = new Object[] { new Integer(age),
                new Integer(id) };
        int type[] = new int[] { Types.INTEGER , Types.INTEGER };
        jt.update(sql, params, type);
    }
}

<?xml version="1.0" encoding="UTF-8"?>
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"
       >
 
            base-package="com" />
            base-package="service" />
            class="org.springframework.web.servlet.view.UrlBasedViewResolver">
                    value="org.springframework.web.servlet.view.JstlView" />
       
       
   
 
   
   
       
           
       
   
   
   
       
           
                    
       
   
   
   
       
       
       
                
   
   
                               value="com.mysql.jdbc.Driver">
                               value="jdbc:mysql://localhost:3306/test">
                               value="root">
                               value="1234">
   
   
       
   
            class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
       
   




package com;
import java.sql.Types;
import javax.annotation.Resource;
import org.springframework.jdbc.core.JdbcTemplate;
public class NiutDAO implements INiutDAO {
    @Resource
    private JdbcTemplate jt;
    public void daoUpdateRegister(int age,int id) {
        String sql = "UPDATE register SET age=? WHERE id=?";
        Object params[] = new Object[] { new Integer(age),
                 new Integer(id) };
        int type[] = new int[] { Types.INTEGER , Types.INTEGER };
        jt.update(sql, params, type);
    }
}

package com;
public interface INiutDAO {
    public void daoUpdateRegister(int age,int id);
}

更多内容请见原文，文章转载自：https://blog.csdn.net/qq_44591615/article/details/109206459