全局異常一般有很多種方式，比如自定義，繼承之類的，一般來(lái)說(shuō)，主要還是用2個(gè)注解

• @ControllerAdvice
• @ExceptionHandler

拋出異常

package com.jiataoyuan.demo.springboot.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.concurrent.TimeoutException;

/**
 * @author TaoYuan
 * @version V1.0.0
 * @date 2018/4/16 0016
 * @description description
 */
@RestController
@RequestMapping("/exception")
public class ExceptionsController {

    @GetMapping()
    public String Main(){
        return "<h1>Exceptions!</h1>";
    }

    // 拋出異常
    @GetMapping("/timeout")
    public String throwTimeOutException() throws TimeoutException {
        throw new TimeoutException();
    }

    @GetMapping("/runtime")
    public String throwRuntimeException(){
        throw new RuntimeException();
    }

    @GetMapping("/common")
    public String throwException() throws Exception {
        throw new Exception();
    }


}

處理異常

package com.jiataoyuan.demo.springboot.controller;

import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.context.request.WebRequest;

import java.util.concurrent.TimeoutException;

/**
 * @author TaoYuan
 * @version V1.0.0
 * @date 2018/4/16 0016
 * @description description
 */
@RestControllerAdvice
public class DefaultExceptionAdvice {
    //處理異常
//    @ExceptionHandler(RuntimeException.class)
//    public String RuntimeException(Exception e, WebRequest webRequest){
//        return "<p>ExceptionType:" + e + "</p>"
//                + "<p>WebRequest:" + webRequest + "</p>";
//    }
//
//    @ExceptionHandler(TimeoutException.class)
//    public String TimeOutException(Exception e, WebRequest webRequest){
//        return "<p>ExceptionType:" + e + "</p>"
//                + "<p>WebRequest:" + webRequest + "</p>";
//    }

    @ExceptionHandler(Exception.class)
    public String Exception(Exception e, WebRequest webRequest){
        return "<p>ExceptionType:" + e + "</p>"
                + "<p>WebRequest:" + webRequest + "</p>";
    }
}

基本就是這樣了，實(shí)際開(kāi)發(fā)過(guò)程中，肯定不會(huì)這么隨意，一般都會(huì)繼承RuntimeException然后進(jìn)行細(xì)分。