Spring中的事务拦截器顺序如何控制详解

@EnableTransactionManagement(order = 2)

DROP DATABASE IF EXISTS javacode2018;
CREATE DATABASE if NOT EXISTS javacode2018;

USE javacode2018;
DROP TABLE IF EXISTS t_user;
CREATE TABLE t_user(
  id int PRIMARY KEY AUTO_INCREMENT,
  name varchar(256) NOT NULL DEFAULT '' COMMENT '姓名'
);

org.springframework.transaction.interceptor.TransactionInterceptor

package com.javacode2018.tx.demo10;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.sql.DataSource;

@Configuration //说明当前类是一个配置类
@ComponentScan //开启bean自动扫描注册功能
@EnableTransactionManagement(order = 2) //@1：设置事务拦截器的顺序是2
@EnableAspectJAutoProxy // @2：开启@Aspect Aop功能
public class MainConfig10 {
    @Bean
    public DataSource dataSource() {
        org.apache.tomcat.jdbc.pool.DataSource dataSource = new org.apache.tomcat.jdbc.pool.DataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/javacode2018?characterEncoding=UTF-8");
        dataSource.setUsername("root");
        dataSource.setPassword("root123");
        dataSource.setInitialSize(5);
        return dataSource;
    }

    //定义一个jdbcTemplate
    @Bean
    public JdbcTemplate jdbcTemplate(DataSource dataSource) {
        return new JdbcTemplate(dataSource);
    }

    //定义事务管理器transactionManager
    @Bean
    public PlatformTransactionManager transactionManager(DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }
}

package com.javacode2018.tx.demo10;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
@Component
public class UserService {
    @Autowired
    private JdbcTemplate jdbcTemplate;
    @Transactional
    public void addUser() {
        System.out.println("--------UserService.addUser start");
        this.jdbcTemplate.update("insert into t_user(name) VALUES (?)", "张三");
        System.out.println("--------UserService.addUser end");
    }
}

package com.javacode2018.tx.demo10;
import org.aopalliance.intercept.Joinpoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
@Component
@Aspect
@Order(1) //@1
public class TransactionInterceptorBefore {
    @Pointcut("execution(* com.javacode2018.tx.demo10.UserService.*(..))")
    public void pointcut() {
    }
    @Around("pointcut()")
    public Object tsBefore(ProceedingJoinPoint joinPoint) throws Throwable {
        System.out.println("--------before start!!!");
        Object result = joinPoint.proceed();
        System.out.println("--------before end!!!");
        return result;
    }
} 

package com.javacode2018.tx.demo10;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
@Component
@Aspect
@Order(2)
public class TransactionInterceptorAfter {
    @Pointcut("execution(* com.javacode2018.tx.demo10.UserService.*(..))")
    public void pointcut() {
    }
    @Around("pointcut()")
    public Object tsAfter(ProceedingJoinPoint joinPoint) throws Throwable {
        System.out.println("--------after start!!!");
        Object result = joinPoint.proceed();
        System.out.println("--------after end!!!");
        return result;
    }
}

package com.javacode2018.tx.demo10;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;
public class Demo10Test {
    private UserService userService;
    private JdbcTemplate jdbcTemplate;
    @Before
    public void before() {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MainConfig10.class);
        userService = context.getBean(UserService.class);
        this.jdbcTemplate = context.getBean("jdbcTemplate", JdbcTemplate.class);
        jdbcTemplate.update("truncate table t_user");
    }
    @Test
    public void test1() {
        this.userService.addUser();
    }
}