springboot2.0系列教程springboot框架添加全局异常处理(代码片段)

package com.example.demo.core.ret;

import java.io.Serializable;

/**
 * @Description: 业务类异常
 * @author 张瑶
 * @date 2018/4/20 14:30
 * 
 */
public class ServiceException extends RuntimeException implements Serializable

   private static final long serialVersionUID = 1213855733833039552L;

   public ServiceException() 
   

   public ServiceException(String message) 
      super(message);
   

   public ServiceException(String message, Throwable cause) 
      super(message, cause);
   

@Override
public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) 
    exceptionResolvers.add(getHandlerExceptionResolver());


/**
 * 创建异常处理
 * @return
 */
private HandlerExceptionResolver getHandlerExceptionResolver()
    HandlerExceptionResolver handlerExceptionResolver = new HandlerExceptionResolver()
        @Override
        public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response,
                                             Object handler, Exception e) 
            RetResult<Object> result = getResuleByHeandleException(request, handler, e);
            responseResult(response, result);
            return new ModelAndView();
        
    ;
    return handlerExceptionResolver;


/**
 * 根据异常类型确定返回数据
 * @param request
 * @param handler
 * @param e
 * @return
 */
private RetResult<Object> getResuleByHeandleException(HttpServletRequest request, Object handler, Exception e)
    RetResult<Object> result = new RetResult<>();
    if (e instanceof ServiceException) 
        result.setCode(RetCode.FAIL).setMsg(e.getMessage()).setData(null);
        return result;
    
    if (e instanceof NoHandlerFoundException) 
        result.setCode(RetCode.NOT_FOUND).setMsg("接口 [" + request.getRequestURI() + "] 不存在");
        return result;
    
    result.setCode(RetCode.INTERNAL_SERVER_ERROR).setMsg("接口 [" + request.getRequestURI() + "] 内部错误，请联系管理员");
    String message;
    if (handler instanceof HandlerMethod) 
        HandlerMethod handlerMethod = (HandlerMethod) handler;
        message = String.format("接口 [%s] 出现异常，方法：%s.%s，异常摘要：%s", request.getRequestURI(),
                handlerMethod.getBean().getClass().getName(), handlerMethod.getMethod() .getName(), e.getMessage());
     else 
        message = e.getMessage();
    
    LOGGER.error(message, e);
    return result;


/**
 * @Title: responseResult
 * @Description: 响应结果
 * @param response
 * @param result
 * @Reutrn void
 */
private void responseResult(HttpServletResponse response, RetResult<Object> result) 
    response.setCharacterEncoding("UTF-8");
    response.setHeader("Content-type", "application/json;charset=UTF-8");
    response.setStatus(200);
    try 
        response.getWriter().write(JSON.toJSONString(result,SerializerFeature.WriteMapNullValue));
     catch (IOException ex) 
        LOGGER.error(ex.getMessage());
    

package com.example.demo.service.impl;

import com.example.demo.core.ret.ServiceException;
import com.example.demo.dao.UserInfoMapper;
import com.example.demo.model.UserInfo;
import com.example.demo.service.UserInfoService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

/**
 * @author 张瑶
 * @Description:
 * @time 2018/4/18 11:56
 */
@Service
public class UserInfoServiceImpl implements UserInfoService

    @Resource
    private UserInfoMapper userInfoMapper;

    @Override
    public UserInfo selectById(Integer id)
        UserInfo userInfo = userInfoMapper.selectById(id);
        if(userInfo == null)
            throw new ServiceException("暂无该用户");
        
        return userInfo;
    

package com.example.demo.controller;

import com.example.demo.core.ret.RetResponse;
import com.example.demo.core.ret.RetResult;
import com.example.demo.core.ret.ServiceException;
import com.example.demo.model.UserInfo;
import com.example.demo.service.UserInfoService;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;

/**
 * @author 张瑶
 * @Description:
 * @time 2018/4/18 11:39
 */
@RestController
@RequestMapping("userInfo")
public class UserInfoController 

    @Resource
    private UserInfoService userInfoService;

    @PostMapping("/hello")
    public String hello()
        return "hello SpringBoot";
    

    @PostMapping("/selectById")
    public RetResult<UserInfo> selectById(Integer id)
        UserInfo userInfo = userInfoService.selectById(id);
        return RetResponse.makeOKRsp(userInfo);
    

    @PostMapping("/testException")
    public RetResult<UserInfo> testException(Integer id)
        List a = null;
        a.size();
        UserInfo userInfo = userInfoService.selectById(id);
        return RetResponse.makeOKRsp(userInfo);