微信消息处理

package cn.liuning;


import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

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

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.kohsuke.rngom.digested.Main;


public class CoreServe extends HttpServlet 
{
    
     //用于存放解析的结果
    public static Map<String, String> parseXml(HttpServletRequest request, HttpServletResponse response) throws Exception 
    {  
        // 将解析结果存储在HashMap中  ，用到了泛型，就是Map中只能使用string-string的对用，其他数据类型不行
        Map<String, String> map = new LinkedHashMap<String, String>();  
        // 从request中取得输入流  
        InputStream inputStream = request.getInputStream(); 
        // 读取输入流   
        SAXReader reader = new SAXReader();  
        Document document = reader.read(inputStream);  
        // 得到xml根元素  
        Element root = document.getRootElement();   
        // 得到根元素的所有子节点  
        List<Element> elementList = root.elements();  
        // 遍历所有子节点，增强for进行循环
        //也可以使用传统方式
        for (Element e : elementList)  
            map.put(e.getName(), e.getText());  
        // 释放资源  
        inputStream.close();  
        inputStream = null;  
        

        //原样输出<XML>文档
        String value = document.asXML();
        char []str = value.toCharArray();
        PrintWriter out = response.getWriter();
        out.println("原始消息");
        // out.println(value);
        //直接输出string会有<?xml version="1.0" encoding="UTF-8"?>
        //所以除去头上的39个元素输出
        for(int i=0;i<value.length()-39;i++)
        {
            out.print(str[i+38]);
        }
        return map;  
    }  
    public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException        
    {
        try {
            //解决乱码问题
         request.setCharacterEncoding("UTF-8");  
         response.setContentType("text/html;charset=UTF-8"); 
         
         Map<String, String> requestMap;
         requestMap = parseXml(request,response);
         String fromUserName = requestMap.get("FromUserName");
         String toUserName = requestMap.get("ToUserName"); 
         String createtime = requestMap.get("CreateTime");
         int ctime = Integer.parseInt(createtime);
         String msgType = requestMap.get("MsgType");   
         PrintWriter out = response.getWriter();
        out.println("解析结果：");
        out.print("FromUserName(来自)：");out.println(fromUserName);
        out.print("ToUserName(发送至)：");out.println(toUserName);
        out.print("CreateTime(时间)：");
        
        //时间转换
        SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");
        out.println(format.format((long)ctime*1000L));
        
        out.print("MsgType(类型)：");out.println(msgType);
        if(msgType.equals("text"))
        {
             String content = requestMap.get("Content");
             String msgId = requestMap.get("MsgId");
             out.print("Content(文本内容)：");out.println(content);
                out.print("MsgId(文本消息标记号)：");out.println(msgId); 
        }
        else if(msgType.equals("event"))
        {
                String event = requestMap.get("Event");
             String eventKey = requestMap.get("EventKey");
             out.print("Event(事件)：");out.println(event);
            out.print("Eventkey(事件值)：");out.println(eventKey);
        }
        out.flush();
        out.close();
        } catch (Exception e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
    } 
}