package cn.lihainan.test;

 import java.io.BufferedReader;

 import java.io.ByteArrayInputStream;

 import java.io.ByteArrayOutputStream;

 import java.io.FileInputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.InputStreamReader;

 import java.io.PrintWriter;

 import java.text.SimpleDateFormat;

 import javax.servlet.ServletException;

 import javax.servlet.ServletRequest;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import javax.xml.parsers.DocumentBuilder;

 import javax.xml.parsers.DocumentBuilderFactory;

 import javax.xml.parsers.ParserConfigurationException;

 import org.dom4j.io.SAXReader;

 import org.dom4j.io.XMLWriter;

 import org.w3c.dom.Document;

 import org.w3c.dom.Node;

 public class Demo1 extends HttpServlet {

     public void doPost(HttpServletRequest request, HttpServletResponse response)

     throws ServletException, IOException {

         try {    // 将请求、响应的编码均设置为UTF-8（防止中文乱码）

         request.setCharacterEncoding("utf-8");

         response.setContentType("textml;charset=utf-8");

         InputStream inputStream = request.getInputStream();

         String result = readFromInputStream(inputStream);

         PrintWriter out = response.getWriter();

         out.println("原始消息：");

         out.println(result);

         //解析 建立document解析

         DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

         DocumentBuilder builder;

         builder = factory.newDocumentBuilder();

         InputStream xmlStream = new ByteArrayInputStream(result.getBytes("UTF-8"));

         Document document =  builder.parse(xmlStream);

         //定义节点    根据节点从document中找到要输出的

         Node ToUserName = document.getElementsByTagName("ToUserName").item(0);

         System.out.println(ToUserName.getTextContent());

         Node FromUserName = document.getElementsByTagName("FromUserName").item(0);

         System.out.println(FromUserName.getTextContent());

         Node MsgType= document.getElementsByTagName("MsgType").item(0);

         System.out.println(MsgType.getTextContent());

         Node Content = document.getElementsByTagName("Content").item(0);

         System.out.println(Content.getTextContent());

         Node MsgId= document.getElementsByTagName("MsgId").item(0);

         System.out.println(MsgId.getTextContent());

         out.println();

         //输出

         out.println("解析结果：");

         out.print("FromUserName(来自):");

         out.println(FromUserName.getTextContent());

         out.print("ToUserName(发送至):");

         out.println(ToUserName.getTextContent());

         out.print("CreateTime(时间):");

         Node createTime= document.getElementsByTagName("CreateTime").item(0);

         int t = Integer.parseInt(createTime.getTextContent());

         SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");

         out.println(format.format((long)t*1000L));

         out.print("MsgType(消息类型):");

         out.println(MsgType.getTextContent());

         out.print("Content(文本内容):");

         out.println(Content.getTextContent());

         out.print("MsgId(文件消息标识号):");

         out.println(MsgId.getTextContent());

         } catch (ParserConfigurationException e) {

         // TODO Auto-generated catch block

         e.printStackTrace();

         } catch (Exception e) {

         // TODO Auto-generated catch block

         e.printStackTrace();

         }

     }

     //将输入流InputStream变为String

     public String readFromInputStream(InputStream in) throws IOException {

         ByteArrayOutputStream baos = new ByteArrayOutputStream();

         byte[] buffer = new byte[1024];

         int len = -1;

         while ((len = in.read(buffer)) != -1) {

             baos.write(buffer, 0, len);

         }

         baos.close();

         in.close();

         // 解析内容     看网上更改 输出中文乱码  但是未解决  已知输入流为gbk  输出为utf-8  求如何转换

         byte[] lens = baos.toByteArray();

         String result = new String(lens,"UTF-8");

         return result;

     }

 }