spring用java config的方式开启事务

事务使用java config 开启可以这样写：
事务只需要注入getDataSourceTransactionManager这个bean，并且加上@EnableTransactionManagement即可。这里用了阿里的德鲁克的数据源。

package com.max;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration
@ComponentScan(value = "com.max")
@EnableTransactionManagement
public class MaxConfig {

    @Bean
    public JdbcTemplate  getJdbcTemplate(){
        JdbcTemplate jdbcTemplate = new JdbcTemplate();
        jdbcTemplate.setDataSource(getDruidDataSource());
        return jdbcTemplate;
    }

    @Bean
    public DruidDataSource getDruidDataSource(){
        DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setUsername("root");
        druidDataSource.setPassword("123456");
        druidDataSource.setUrl("jdbc:mysql://localhost:3306/test");
        druidDataSource.setDriverClassName("com.mysql.jdbc.Driver");
        return druidDataSource;
    }

    @Bean
    public DataSourceTransactionManager getDataSourceTransactionManager(){
        DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager(getDruidDataSource());
        return dataSourceTransactionManager;
    }
}

如何使用呢，在DAO层直接使用@Autowrid注入即可

@Repository
public class UserDaoImpl implements IUserDao{
    @Autowired
    private JdbcTemplate jdbcTemplate1;
    @Override
    public List getUser(){
        return jdbcTemplate1.query("select * from oooo where id =1 ",new BeanPropertyRowMapper<>(User.class));
    }
    @Override
    public void add(){
        jdbcTemplate1.update("update oooo set age = 10 where id = 1");
    }
    @Override
    public void reduce(){
        jdbcTemplate1.update("update oooo set age = 10 where id = 3");
    }
}

使用事务，在service层，加上@Transactional注解即可

package com.max.service.impl;

import com.max.dao.IUserDao;
import com.max.entity.User;
import com.max.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class UserServiceImpl implements IUserService {
    @Autowired
    private IUserDao iUserDao;
    public List getUser(Integer id){
        List user = iUserDao.getUser();
        return user;
    }

    public void add (){
        iUserDao.add();
    }
    public void reduce(){
        iUserDao.reduce();
    }
    @Transactional
    public void test(){
        add();
        int i = 1/0;
        reduce();
    }
}