此代码中的BaseController都有什么功能

package com.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.json.JSONException;
import org.json.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

/**

  • Action 基类

  • /
    @Controller
    public class BaseController {

    /* 日志 */
    protected final Log log = LogFactory.getLog(getClass());

    /* 获取基本环境 */
    public Map<String, String[]> getParameters() {// 封装为Map的requestParameters

      ServletRequestAttributes attrs = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
  return attrs.getRequest().getParameterMap();

    }

    public HttpServletRequest getRequest() {

      ServletRequestAttributes attrs = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
  return attrs.getRequest();

    }

    public HttpSession getSession() {

      HttpSession session = null;
  try {
      session = this.getRequest().getSession();
  } catch (Exception e) {
  }
  return session;

    }

    /* 向客户端输出操作成功或失败信息 */
    public void writeJsonResponse(String success) throws IOException, JSONException {

      ServletRequestAttributes attrs = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
  HttpServletResponse response = attrs.getResponse();
  response.setContentType("text/json;charset=UTF-8");
  PrintWriter out = response.getWriter();
  // 将要被返回到客户端的对象
  JSONObject json = new JSONObject();
  json.accumulate("result", success);
  System.out.println(json.toString());
  out.println(json.toString());
  out.flush();
  out.close();

    }
    }

获取request对象方法, session对象方法，发送JSon数据方法。

1、log记录日志功能
2、getParameters获取请求中所有的参数
3、getRequest获取request请求
4、getSession获取session会话
5、writeJsonResponse向客户端响应json 结果

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