关于controller的异常处理及service层的事务控制方式

// 测试回滚成功案例，基于IllegalArgumentException（RuntimeException）实现回滚
@GetMapping("/testSuccess")
@Transactional// 如果不加，就不会回滚
public R testSuccess(@RequestParam("type") Integer type){
    eduTeacherService.removeById("2");
    if (type == 1){
        throw new IllegalArgumentException("测试回滚成功案例!");
    }
    eduTeacherService.removeById("3");
    return  R.ok();
}

// 测试回滚失败案例，基于Exception实现回滚；
@GetMapping("/testFail")
@Transactional
public R testFail(@RequestParam("type") Integer type)  {
    try {
        eduTeacherService.removeById("2");
        if (type == 1){
            throw new Exception("测试回滚失败案例!");
        }
        eduTeacherService.removeById("3");
    } catch (Exception e) {
        e.printStackTrace();
    }
    return  R.ok();
}

rollbackFor = Exception.class + throws Exception

@GetMapping("/testFailRollbackFor")
// 配置rollbackFor
@Transactional(propagation= Propagation.REQUIRED,rollbackFor = Exception.class)
public R testFailRollbackFor(@RequestParam("type") Integer type) throws Exception {
        eduTeacherService.removeById("2");
        if (type == 1){
            throw new Exception("测试回滚失败rollbackFor成功案例!");
        }
        eduTeacherService.removeById("3");
    return  R.ok();
}

catch：
TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();

@GetMapping("/testSuccessByHand")
@Transactional
public R testSuccessByHand(@RequestParam("type") Integer type)  {
    try {
        eduTeacherService.removeById("2");
        if (type == 1){
            throw new Exception("测试回滚失败案例!");
        }
        eduTeacherService.removeById("3");
    } catch (Exception e) {
        e.printStackTrace();
        //手动回滚，如果sql2()抛了异常,sql1()会回滚,不影响事物正常执行
        TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();
    }
    return  R.ok();
}