SpringBoot全局异常处理

全局处理异常示例

@ControllerAdvice
@Slf4j
public class GlobleExceptionHandler {
    @ExceptionHandler(value = {MyException.class})
    @ResponseBody
    public ResultBean errorHandler(MyException e){
        log.info("业务异常发生:{}",e.getMessage());
        return ResultBean.errorMsg(e.getMessage());
    }
}

统一返回的结果类

public class MyException extends RuntimeException{

    /**
     * 错误状态码
     * */
    int errorCode;

    /**
     * 返回信息
     * */
    String message;

    public static MyException error(String message){
        return new MyException(message);
    }

    public static MyException error(){
        return new MyException();
    }

    public MyException() {
        this.errorCode = 500;
    }

    public MyException(String message) {
        this.errorCode = 500;
        this.message = message;
    }

    public int getErrorCode() {
        return errorCode;
    }

    public void setErrorCode(int errorCode) {
        this.errorCode = errorCode;
    }

    @Override
    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

Controller层

@GetMapping("/{id}")
public Book getDetail(@PathVariable Long id){
    return bookService.getDetail(id);
}

Service层

public Book getDetail(Long id){
    Book resultBook = Optional.ofNullable(getById(id))
                .orElseThrow(()->new MyException("没有找到该书籍")); //这里主动抛出异常交给全局异常处理
    return resultBook;

运行测试

结果：