springboot2.x使用事务

一、首先写两个工具业务类

  @Override
    public EmployeeEntity addbsarary() {

        EmployeeEntity entity = employeeDao.selectById(1002);
        entity.setBsaralry(entity.getBsaralry() + 1000);
        return entity;
    }

    @Override
    public EmployeeEntity substuctbsarary() {
        EmployeeEntity entity = employeeDao.selectById(1003);
        entity.setBsaralry(entity.getBsaralry() - 1000);
        return entity;
    }

二、写要使用事务的业务类

 @Override
    //使用事务
    @Transactional
    public String acountbasaraly() {
        String s = null;
        EmployeeEntity entity1 = employeeService.addbsarary();
        EmployeeEntity entity2 = employeeService.substuctbsarary();
        employeeService.updateById(entity1);
        int i = 1 / 0;
        employeeService.updateById(entity2);
        s = "修改成功";
        return s;

    }

三、编写测试类

 @Test
    public void contextLoads2() {
        String s = null;
        try {
            s = employeeService.acountbasaraly();
            System.out.println(s);
        } catch (Exception e){
            System.out.println("出现错误");
        }
    }

注意：不要在开启事务的业务类上使用try/catch，否则事务不会起作用。