SpringBoot异常捕获器

异常捕获类(只要我们写代码中用一下异常做抛出, 那么就会被捕获到)

package com.xiaoge.exception;

import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import javax.security.sasl.AuthenticationException;
import java.util.List;


@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {


    
    @ExceptionHandler(value = RuntimeException.class)
    public ResponseEntity runtimeExceptionHandler(RuntimeException e) {
        String message = e.getMessage();
        log.error(message);
        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("服务器维护中");
    }


    
    @ExceptionHandler(value = AuthenticationException.class)
    public ResponseEntity authenticationExceptionHandler(AuthenticationException e) {
        String message = e.getMessage();
        log.error(message);
        return ResponseEntity.badRequest().body("账号密码错误!");
    }


    
    @ExceptionHandler(value = IllegalArgumentException.class)
    public ResponseEntity illegalArgumentExceptionHandler(IllegalArgumentException e) {
        String message = e.getMessage();
        log.error(message);
        return ResponseEntity.badRequest().body("账号密码错误!");
    }


    
    @ExceptionHandler({MethodArgumentNotValidException.class})
    public ResponseEntity methodArgumentNotValidException(MethodArgumentNotValidException bindException) {
        BindingResult bindingResult = bindException.getBindingResult();
        System.out.println(bindingResult);
        StringBuilder sb = new StringBuilder("数据校验失败，原因是:");
        List fieldErrors = bindingResult.getFieldErrors();
        for (FieldError fieldError : fieldErrors) {
            sb.append("字段:" + fieldError.getField() + "," + fieldError.getDefaultMessage() + "!");
        }
        return ResponseEntity.badRequest().body(sb.toString());
    }


}

写一个启动类就行