springmvc 捕獲全局異常 實現 HandlerExceptionResolver

package com.ais.cs.ddi.exceptionHandler;

import com.ais.cs.ddi.web.exception.BaseException;
import org.json.JSONObject;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;

@Component
public class CustomExceptionHandler implements HandlerExceptionResolver {

    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        ex.printStackTrace();
       
        printWrite(ex.getMessage(), response);

        return null;
    }

    /**
     * 將錯誤信息添加到response中
     *
     * @param msg
     * @param response
     */
    public static void printWrite(String msg, HttpServletResponse response) {
        try {
            response.setContentType("application/json;charset=UTF-8");
            PrintWriter pw = response.getWriter();
            pw.write(msg);
            pw.flush();
            pw.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}