SpringBoot(二十)_404返回统一异常处理结果

1.修改application.properties文件

# 自定义404
#出现错误时, 直接抛出异常
spring.mvc.throw-exception-if-no-handler-found=true
#不要为我们工程中的资源文件建立映射
spring.resources.add-mappings=false

2.添加controller增强处理

if (e instanceof NoHandlerFoundException) {
            return ResultUtil.error(ResultEnum.NO_HANDLER_FOUND_ERROR);
        }

3.测试

访问 http://localhost:8080/hello1

// 20190705114619
// http://localhost:8080/hello1

{
  "code": 404,
  "msg": "接口不存在",
  "data": null
}

4.完整controller增强处理类

package com.kevin.common.exception;

import com.kevin.common.entity.Result;
import com.kevin.common.enums.ResultEnum;
import com.kevin.common.util.ResultUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.validation.BindException;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.NoHandlerFoundException;

import java.util.List;

/**
 * 异常处理器
 *
 * @author kevin
 * @date 2019/7/4 14:46
 */
@RestControllerAdvice
@Slf4j
public class KevinExceptionHandler {

    @ExceptionHandler(Exception.class)
    public Result handleException(Exception e) {
        log.error(e.getMessage(), e);

        if (e instanceof KevinException) {
            return ResultUtil.error(e.getMessage());
        } else if (e instanceof NoHandlerFoundException) {
            return ResultUtil.error(ResultEnum.NO_HANDLER_FOUND_ERROR);
        } else if (e instanceof IllegalArgumentException) {
            return ResultUtil.error(e.getMessage());
        } else if (e instanceof IllegalStateException) {
            return ResultUtil.error(e.getMessage());
        } else if (e instanceof BindException) {
            BindException ex = (BindException) e;
            List<ObjectError> allErrors = ex.getAllErrors();
            ObjectError error = allErrors.get(0);
            String defaultMessage = error.getDefaultMessage();
            return ResultUtil.error(defaultMessage);
        } else if (e instanceof MethodArgumentNotValidException) {
            MethodArgumentNotValidException ex = (MethodArgumentNotValidException) e;
            List<ObjectError> errors = ex.getBindingResult().getAllErrors();
            String message = errors.get(0).getDefaultMessage();
            return ResultUtil.error(message);
        } else {
            return ResultUtil.error(ResultEnum.UNKNOW_ERROR);
        }
    }
}

好了玩的开心

最近在整合一个springboot2.X的框架。里面就集成了这块，有兴趣的可以下载下来看看
地址：https://github.com/FunCodingOfWe/kevin-boot

欢迎start