spring 事务

@component
public class FooServiceImpl implements FooService{
    @Autowired
    private JdbcTemplate jdbcTemplate;


    @Override
    @Transactional
    public void insertRecord(){
        jdbcTempalte.eccute("INSERT INTO FOO (BAR) VALUES('AAA')");
    }


    @Overrive
    @Transactional(rollbackFor = RollbackException.calss)
    public void insertThenRollback(){
        jdbcTemplate.excute("INSERT INTO FOO (BAR) VALUES ('BBB')");
        throw new RollbackException();
    }

    @Overrive
    public void invokeInsertThenRollback() throws RollbackException{
        insertThenRollback();
    }
    //要想上面这个方法添加上事务
    第一步：注入实例
      @Autowired
    private FooService fooService;
    //把自己的实例注入进来，比较方便理解
    @Override
    public void invokeInsertThenRollbackBySelfService() throws RollbackException {
        fooService.insertThenRollback();
    }
    //获取当前代理，这样写避免了自己调用自己的实例
    @Override
    public void invokeInsertThenRollbackByAopContext() throws RollbackException {
        ((FooService) (AopContext.currentProxy())).insertThenRollback();
    }
    //再加一层事务
    @Transactional(rollbackFor = RollbackException.class)
    @Override
    public void invokeInsertThenRollbackAddTransactional() throws RollbackException {
        insertThenRollback();
    }

}



Public class DeclarativeTransactionDemApplication implements CommandLineRunner{
    @Autowried
    private FooService fooService;
    @Autowried
    private JdbcTemplate jdbcTemplate;

    public static void main (String[] args){
        SpringApplication.run(DeclarativeTransactionDemApplication.class);
    }

    @Override
    public void run(String... args){
        fooSerive.insertRecord();

        log.info("AAA {}",jdbcTemplate.queryForObject("SELECT COUNT(*) FROM FOO WHERE BAR ='AAA'",Long.class));

        //结果 1

        try{
            fooService.insertThenRollback();
        }catch(Exception e){
            log.info("BBB {}",jdbcTemplate.queryForObject("SELECT COUNT(*) FROM FOO WHERE BAR ='BBB'",Long.class));
        }

        //结果 0

        try{
            fooService.invokeInsertThenRollback();
        }catch(Exception e){
            log.info("BBB {}",jdbcTemplate.queryForObject("SELECT COUNT(*) FROM FOO WHERE BAR ='BBB'",Long.class));
        }

        //结果 1   spring 事务是通过穿建 代理对象来添加事务 这个是内部调用 调用方法  所以在调用的时候不会增强事务
        //要想它加上事务


    }
    
}