Android做客户端，Web做服务端（Xml数据格式）

一、客户端：

①加访问网络权限：

<uses-permission android:name="android.permission.INTERNET" />

②java代码：

new Thread(new Runnable() {

            @Override
            public void run() {
                URL url;
                    try {
                        url = new URL(
                                "http://222.194.118.84:8909/Testt/acquire.do");
                        //注意Web服务器的url
                        HttpURLConnection conn = (HttpURLConnection) url
                                .openConnection();
                        conn.setRequestMethod("POST");
                        // 获取HTTP连接并设置访问方式
                        if (conn.getResponseCode() == 200) {
                        InputStream in = conn.getInputStream();
                        // 获取输入流
                        XmlPullParser parser = Xml.newPullParser();
                        parser.setInput(in, "UTF-8");
                        int event = parser.getEventType();
                        while (event != XmlPullParser.END_DOCUMENT) {
                        // 是否读完整个XML文档
                            switch (event) {
                            case XmlPullParser.START_TAG:
                            // 一段开始的标志
                                if (("name").equals(parser.getName())) {
                                    Log.i("start_document","start_document"
                                    + parser.nextText());
                                // 获取<name>中设置的文本
                            }
                                        break;
                        }
                        event = parser.next();
                        //换下一个标签
                    }
                }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }

                    }
                }).start();

二、服务端

①导入jar包（Java代码创建xml文件）：

下载地址：http://download.youkuaiyun.com/detail/zhengyikuangge/9510313

②Web项目的web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <display-name></display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>
    <servlet>
        <servlet-name>servlet</servlet-name>
        <servlet-class>com.test.servlet.ServletTest</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>servlet</servlet-name>
        <url-pattern>/acquire.do</url-pattern>
    </servlet-mapping>
</web-app>

③ServletTest.java:

package com.test.servlet;

import java.io.IOException;

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.DocumentHelper;
import org.dom4j.Element;

public class ServletTest extends HttpServlet {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        resp.setCharacterEncoding("UTF-8");
        // 设置编码方式
        Document document = DocumentHelper.createDocument();
        Element persons = DocumentHelper.createElement("persons");
        document.add(persons);
        // 创建一个xml对象
        persons.addElement("name").addText("zwq");
        // <persons><name>zwq</name></persons>
        String xml = persons.asXML();
        resp.getOutputStream().write(xml.getBytes());
        // 返回数据流
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        doPost(req, resp);
    }

}