package com.manage.controller;

/**
 * @ProjectName:
 * @Description:
 * @Param 传输参数
 * @Return
 * @Author: 曾文和
 * @CreateDate: 2020/5/15 16:14
 * @UpdateUser: 曾文和
 * @UpdateDate: 2020/5/15 16:14
 * @UpdateRemark: 更新说明
 * @Version: 1.0
 */

import com.alibaba.fastjson.support.spring.FastJsonJsonView;
import com.manage.util.ExceptionPrintUtil;
import org.apache.log4j.Logger;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import java.util.HashMap;
import java.util.Map;

@ControllerAdvice
public class GlobalExceptionHandler {
    private static Logger log = Logger.getLogger("errorMsg");
    @ExceptionHandler(value = Exception.class)//指定拦截的异常
    public ModelAndView errorHandler(Exception e) {
        return returnMv(e, "服务器出错了,请联系系统管理员");
    }

    @ExceptionHandler(value = RuntimeException.class)//指定拦截的异常
    public ModelAndView runtimeHandler(Exception e) {
        return returnMv(e, "服务器出错了,请联系系统管理员");
    }

    @ExceptionHandler(BindException.class)
    @ResponseBody
    public Map<String, Object> bindErrHandler(BindException e) {
        Map<String,Object> map = new HashMap<String, Object>(3) {{
            put("code", "500");
            put("msg", "参数有误");
            BindingResult bindingResult = e.getBindingResult();
            put("fieldErrors", new HashMap<String, String>(bindingResult.getErrorCount()) {{
                bindingResult.getFieldErrors().forEach(fieldError -> put(fieldError.getField(), fieldError.getDefaultMessage()));
            }});
        }};
        log.error(map.toString());
        return map;
    }

    private ModelAndView returnMv(Exception e, String msg) {
        ModelAndView mv = new ModelAndView();
        /*  使用FastJson提供的FastJsonJsonView视图返回，不需要捕获异常   */
        FastJsonJsonView view = new FastJsonJsonView();
        Map<String, Object> attributes = new HashMap<>(1);
        attributes.put("code", "500");
        attributes.put("msg", msg);
        view.setAttributesMap(attributes);
        mv.setView(view);
        //方法名
        ExceptionPrintUtil.printException(e);
        e.printStackTrace();
        return mv;
    }
}