Android做客户端，Web做服务端（Xml数据格式）

妖狐艹你老母 2022-08-21 14:39 185阅读 0赞

## 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.csdn.net/detail/zhengyikuangge/9510313][http_download.csdn.net_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);
        }
    
    }

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