Android解析服务器端发来的xml数据

我不是女神ヾ 2021-06-24 16:12 239阅读 0赞

Android跟服务器交互数据，有时数据量大时，就需要以xml形式的交互数据。这里来实现服务器给Android客户端发送xml数据，Android客户端解析。

服务器端我使用dom4j第三方包来组织xml数据，大家可自行百度下载。而Android客户端则使用 XmlPullParser来解析xml数据。

**服务器端代码：**

package servlet;
    
    import java.io.IOException;
    import java.io.PrintWriter;
    import java.net.URLDecoder;
    import java.sql.Connection;
    import java.sql.ResultSet;
    import java.sql.Statement;
    
    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 getSms extends HttpServlet {
    	public getSms() {
    		super();
    	}
    	public void destroy() {
    		super.destroy(); // Just puts "destroy" string in log
    		// Put your code here
    	}
    	public void doGet(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    		response.setContentType("text/html; charset=UTF-8" );
    		 request.setCharacterEncoding("UTF-8");

Document document = DocumentHelper.createDocument(); 
                   Element persons = DocumentHelper.createElement("persons"); 
                   document.add(persons);

persons.addElement("address").addText("南京");
    	             persons.addElement("id").addAttribute(1); 
    	             persons.addElement("thread_id").addText(2); 
    	             persons.addElement("date").addText("2013"); 
    	             persons.addElement("status").addText(-1); 
    	             persons.addElement("type").addText(0); 
    	             persons.addElement("body").addText("测试");

String xml = document.asXML();  //用dom4j组织一个XML字符串 
    	         response.setContentType("text/xml; charset=UTF-8"); //设置返回值的类型 
    	         response.getOutputStream().write(xml.getBytes("UTF-8"));    //设置返回值 
    	}
    	public void doPost(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    
    	doGet(request,response);
    	}
    	public void init() throws ServletException {
    		// Put your code here
    	}
    
    }

**Android客户端：**

String url="http://10.0.2.2:8080/sms_server/servlet/getSms";
    		try{
    		URL u = new URL(url); 
            HttpURLConnection conn = (HttpURLConnection) u.openConnection(); 
            conn.setRequestMethod("GET"); 
            if (conn.getResponseCode() == 200) { 
                InputStream in = conn.getInputStream(); 
                XmlPullParser parser = Xml.newPullParser(); 
                parser.setInput(in, "UTF-8"); 
                int event = parser.getEventType(); 
                while (event != XmlPullParser.END_DOCUMENT) { 
                    Log.i("start_document", "start_document"); 
                    switch (event) { 
                    case XmlPullParser.START_TAG: 
                        if ("address".equals(parser.getName())) { 
                        	String address=parser.nextText();
                        	
                        } 
                        if ("id".equals(parser.getName())) { 
                            int id=parser.getAttributeValue(0); 
                        } 
                        if (("thread_id").equals(parser.getName())) { 
                           String thread_id=parser.nextText(); 
                        } 
                    
                        if ("date".equals(parser.getName())) { 
                           String date=parser.nextText(); 
                        } 
                        if (("status").equals(parser.getName())) { 
                            String status=parser.nextText(); 
                        } 
                        if ("type".equals(parser.getName())) { 
                            String type=parser.nextText(); 
                        } 
                        if ("body".equals(parser.getName())) { 
                            String body=parser.nextText(); 
                        } 
                        break; 
                    case XmlPullParser.END_TAG: 
                        break; 
                    } 
                    event = parser.next(); 
                } 
            }
    		}catch(Exception e){
    			
    		}