Aop 数据库事务控制注解版

直接注解通知顺序不一样，？好像是前置，最终，返回，不是很明白。使用环绕通知自己定义通知顺序，不想探究了。

package com.itheima.utils;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * 和事务管理相关的工具类，它包含了，开启事务，提交事务，回滚事务和释放连接
 */
@Component("txManger")
@Aspect
public class TransactionManager {
    @Autowired
    private ConnectionUtils connectionUtils;
    @Pointcut("execution(* com.itheima.service.impl.*.*(..) )")
    private void pt1(){

    }
    /**
     * 开启事务
     */
    @Around("pt1()")
    public Object aroundAdvice(ProceedingJoinPoint pjp){
        Object trValue=null;
        try {
            Object[] args = pjp.getArgs();
            this.beginTransaction();

           trValue= pjp.proceed(args);
           this.commit();
           return trValue;
        }
        catch (Throwable e){
            this.rollback();
            throw  new RuntimeException(e);
        }finally {
                this.release();
        }
    }

    public  void beginTransaction(){
        try {
            connectionUtils.getThreadConnection().setAutoCommit(false);
        }catch (Exception e){
            e.printStackTrace();
        }
    }

    /**
     * 提交事务
     */

    public  void commit(){
        try {
            connectionUtils.getThreadConnection().commit();
        }catch (Exception e){
            e.printStackTrace();
        }
    }

    /**
     * 回滚事务
     */

    public  void rollback(){
        try {
            connectionUtils.getThreadConnection().rollback();
        }catch (Exception e){
            e.printStackTrace();
        }
    }


    /**
     * 释放连接
     */

    public  void release(){
        try {
            connectionUtils.getThreadConnection().close();//还回连接池中
            connectionUtils.removeConnection();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}