声明式事务

步骤

 * 环境搭建：
 * 1、导入相关依赖
 *      数据源、数据库驱动、Spring-jdbc模块
 *
 * 2、配置数据源、JdbcTemplate（Spring提供的简化数据库操作的工具）数据操作
 * 3、 @Transactional表示当前方法为事务方法
 * 4、 @EnableTransactionManagement开启事务管理功能
 * 5、 配置事务管理器来管理事务

配置类

@EnableTransactionManagement
@ComponentScan("com.dwd.snail.testspring.test.tx")
@Configuration
public class TxConfig {
    @Bean
    public DataSource dataSource() throws PropertyVetoException {
         ComboPooledDataSource dataSource=new ComboPooledDataSource();
         dataSource.setUser("root");
         dataSource.setPassword("123456");
         dataSource.setDriverClass("com.mysql.jdbc.Driver");
         dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/snailtest?characterEncoding=utf8");
         return dataSource;
    }
    @Bean
    public JdbcTemplate jdbcTemplate() throws PropertyVetoException {
        JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource());
        return jdbcTemplate;
    }
    //一定要注册事务管理器在容器中
    @Bean
    public PlatformTransactionManager platformTransactionManager() throws PropertyVetoException {
        return new DataSourceTransactionManager(dataSource());
    }
}

service

@Service
public class UserService {
    @Autowired
    private UserDao userDao;
    @Transactional
    public void insertUser(){
        userDao.insert();
        System.out.println("======================插入成功===========================");
        int i=10/0;
    }
}

Dao

@Repository
public class UserDao {
    @Autowired
    private JdbcTemplate jdbcTemplate;
    public void insert(){

        String sql="INSERT INTO student_info (name,nickname,age) VALUES (?,?,?)";
        String randomstr=UUID.randomUUID().toString().substring(0,2);
        String name="黄"+ randomstr;
        String nickname="蜗牛"+ randomstr;
        int x=(int)(Math.random()*100);
        jdbcTemplate.update(sql,name,nickname,x);
    }

}

test

public class IocTest_tx {
    AnnotationConfigApplicationContext applicationContext=new AnnotationConfigApplicationContext(TxConfig.class);
    @Test
    public void test01(){
//        printBeans(applicationContext);
//        applicationContext.close();
        UserService userService = applicationContext.getBean(UserService.class);
        userService.insertUser();
        applicationContext.close();


    }

//    private void printBeans(AnnotationConfigApplicationContext applicationContext){
//        String[] names=applicationContext.getBeanDefinitionNames();
//        for (String name:names){
//            System.out.println(name);
//            System.out.println(applicationContext.getBean(name));
//        }
//    }
}