Spring 声明式事务管理（完全注解方式）

代码示例 

package com.lmgd.config;

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;

import javax.sql.DataSource;


@Configuration // 配置类
@ComponentScan(basePackages = "com.lmgd")  // 组件扫描(扫描哪些包下的组件)
@EnableTransactionManagement //开启事务 (事务使用：在 serverImpl 类上加上 @Transactional 注解即可，不用配置切入点、切面等等)
public class MyConfig {

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

    
    @Bean
    public JdbcTemplate getJdbcTemplate(DataSource dataSource) {
        JdbcTemplate jdbcTemplate = new JdbcTemplate();
        //注入 dataSource
        jdbcTemplate.setDataSource(dataSource);
        return jdbcTemplate;
    }

    
   

    
    @Bean
    public DataSourceTransactionManager transactionManager(DataSource dataSource) {
        DataSourceTransactionManager transactionManager = new DataSourceTransactionManager();
        transactionManager.setDataSource(dataSource);
        return transactionManager;
    }
}

测试 

 1、测试发生异常是否回滚事务、没有发生异常是否会正常提交事务

2、是否可以正常获得bean对象、扫描到包下的组件、连接数据库等等

public class Test {

    @org.junit.Test
    public void testAccount() {
        //ApplicationContext context = new ClassPathXmlApplicationContext("bean1.xml");
        ApplicationContext context = new AnnotationConfigApplicationContext(MyConfig.class);
        UserServer userServer = context.getBean("userServer", UserServer.class);
        userServer.account();
    }
}