springboot springmvc 抛出全局异常解决方法

springboot中抛出异常，springboot自带的是springmvc框架，这个就不多说了。

springmvc统一异常解决方法这里要说明的是。只是结合了springboot的使用而已。直接上代码，有效有用的才是ok。

1.定义异常捕获

package com.example.rest.error;

import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.NoHandlerFoundException;

import javax.validation.ConstraintViolationException;

/**
 *
 * @author ming 定义全局异常处理
 * @RestControllerAdvice 是@controlleradvice 与@ResponseBody 的组合注解
 */
@RestControllerAdvice 
public class GlobalControllerExceptionHandler {

    @ExceptionHandler(value = { ConstraintViolationException.class })
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public ApiErrorResponse constraintViolationException(ConstraintViolationException ex) {
        return new ApiErrorResponse(500, 5001, ex.getMessage());
    }
    
    @ExceptionHandler(value = { IllegalArgumentException.class })
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public ApiErrorResponse IllegalArgumentException(IllegalArgumentException ex) {
        return new ApiErrorResponse(501, 5002, ex.getMessage());
    }

    @ExceptionHandler(value = { NoHandlerFoundException.class })
    @ResponseStatus(HttpStatus.NOT_FOUND)
    public ApiErrorResponse noHandlerFoundException(Exception ex) {
        return new ApiErrorResponse(404, 4041, ex.getMessage());
    }

    
    @ExceptionHandler(value = { Exception.class })
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public ApiErrorResponse unknownException(Exception ex) {
        return new ApiErrorResponse(500, 5002, ex.getMessage());
    }
}

2.定义一个返回对象

package com.example.rest.error;

/**
 * @author ming
 */
public class ApiErrorResponse {

    private int status;
    private int code;
    private String message;

    public ApiErrorResponse(int status, int code, String message) {
        this.status = status;
        this.code = code;
        this.message = message;
    }

    public int getStatus() {
        return status;
    }

    public int getCode() {
        return code;
    }

    public String getMessage() {
        return message;
    }

    @Override
    public String toString() {
        return "ApiErrorResponse{" +
                "status=" + status +
                ", code=" + code +
                ", message=" + message +
                '}';
    }
}

3.定义一个启动Application

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

@SpringBootApplication
@EnableWebMvc 
public class SpringBootExceptionHandlingApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootExceptionHandlingApplication.class, args);
    }
}

4.最后一个测试类

package com.example.rest.controller;

import org.springframework.http.MediaType;
import org.springframework.util.Assert;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.validation.ConstraintViolationException;
import java.util.Collections;

/**
 * @author ming
 */
@RestController
public class TestController {

    @GetMapping(value = "/test", produces = MediaType.APPLICATION_JSON_VALUE)
    public void test(Long id) {
        Assert.notNull(id,"id不能为空!");
        throw new ConstraintViolationException("error", Collections.emptySet());
    }
}

注意application.properties这个文件的配置

spring.mvc.throw-exception-if-no-handler-found=true

ok，springboot中解决springmvc异常抛出就可以这样解决了。