摘要

SpringBoot全局异常处理对象，这里只是一个简单的用ControllerAdvice完成的实现方式，实现的是对所有在服务器捕捉到的异常进行全局的处理，返回的是ModelAndView对象

说明

使用ControllerAdvice，ExceptionHandler等注解去使用

代码

在SpringBoot中的代码

package com.bothsavage.forum_study.advice;
import com.alibaba.fastjson.JSON;
import com.bothsavage.forum_study.dto.ResultDTO;
import com.bothsavage.forum_study.exception.CustomizeErrorCode;
import com.bothsavage.forum_study.exception.CustomizeException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
/**
 * 全局异常处理对象
 */
@ControllerAdvice
@Slf4j
public class CustomizeExceptionHandler {
    @ExceptionHandler(Exception.class)
    ModelAndView handle(Throwable e, Model model, HttpServletRequest request, HttpServletResponse response) {
        String contentType = request.getContentType();
        if ("application/json".equals(contentType)) {
            ResultDTO resultDTO;
            // 返回 JSON
            if (e instanceof CustomizeException) {
                resultDTO = ResultDTO.errorOf((CustomizeException) e);
            } else {
                log.error("handle error", e);
                resultDTO = ResultDTO.errorOf(CustomizeErrorCode.SYS_ERROR);
            }
            try {
                response.setContentType("application/json");
                response.setStatus(200);
                response.setCharacterEncoding("utf-8");
                PrintWriter writer = response.getWriter();
                writer.write(JSON.toJSONString(resultDTO));
                writer.close();
            } catch (IOException ioe) {
            }
            return null;
        } else {
            // 错误页面跳转
            if (e instanceof CustomizeException) {
                model.addAttribute("message", e.getMessage());
            } else {
                log.error("handle error", e);
                model.addAttribute("message", CustomizeErrorCode.SYS_ERROR.getMessage());
            }
            return new ModelAndView("error");
        }
    }
}

注意

这里就是一个简单的demo，目的是为了知道有这个东西，能马上复制代码拿过来用