Android解析服務器端發來的xml數據示例

2020-04-11 12:06:46

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Android跟服務器交互數據，有時數據量大時，就需要以xml形式的交互數據。這里來實現服務器給Android客戶端發送xml數據，Android客戶端解析。

服務器端我使用dom4j第三方包來組織xml數據，大家可自行百度下載。而Android客戶端則使用 XmlPullParser來解析xml數據。

服務器端代碼：

復制代碼代碼如下:

 
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"); 

復制代碼代碼如下:

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

復制代碼代碼如下:

 
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("測試"); 

復制代碼代碼如下:

 
String xml = document.asXML(); //用dom4j組織一個XML字符串 
response.setContentType("text/xml; charset=UTF-8"); //設置返回值的類型 
response.getOutputStream().write(xml.getBytes("UTF-8")); //設置返回值 
} 
public void doPost(HttpServletRequest request, HttpServletResponse response) 
throws ServletException, IOException { 
doGet(request,response); 
} 
public void init() throws ServletException { 
// Put your code here 
} 
} 

Android客戶端：

復制代碼代碼如下:

 
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){ 

} 