springboot 全域性異常攔截器，友好異常提示

FH-Admin發表於2021-07-24
Spring Boot

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1. 新增config 配置類

package org.fh.config;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.json.MappingJackson2JsonView;

/**
 * 說明：錯誤異常攔截處理
 * 作者：FH Admin
 * from fhadmin.cn
 */
@Configuration
public class ExceptionConfiguration implements HandlerExceptionResolver {

    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler,
            Exception ex) {
        ModelAndView mv = new ModelAndView(new MappingJackson2JsonView());    //返回json

        String exInfo = ex.toString().replaceAll("\n", "<br/>");

        boolean status = exInfo.contains("Subject does not have permission");

        if(status){
            exInfo = "[沒有此頁面的訪問許可權]" + exInfo;
        }else {
            System.out.println("==============異常開始=============");
            ex.printStackTrace();
            System.out.println("==============異常結束=============");
        }
        mv.addObject("exception", exInfo);
        mv.addObject("result", "exception");

        return mv;
    }

}

2. 在邏輯類的方法上丟擲異常 throws Exception，比如 

    /**刪除
     * @param out
     * @throws Exception
     */
    @RequestMapping(value="/delete")
    @RequiresPermissions("autograph:del")
    @ResponseBody
    public Object delete() throws Exception{
        Map<String,String> map = new HashMap<String,String>();
        String errInfo = "success";
        //xxxx
        map.put("result", errInfo);                //返回結果
        return map;
    }

3. 前端頁面接收異常結果

            //傳送 post 請求提交儲存
            $.ajax({
                    xhrFields: {
                        withCredentials: true
                    },
                    type: "POST",
                    url: httpurl+'xxxx/delete',
                    data: {tm:new Date().getTime()},
                    dataType:"json",
                    success: function(data){
                        if("success" == data.result){

                        }else if ("exception" == data.result){
                            alert("模組異常"+data.exception);//顯示異常

                        }
                    }
                });

​

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