springmvc 捕获全局异常 实现 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;
}

/**
* 将错误信息添加到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();
}
}

}