如何解析调用远程接口返回的xml数据 .
dom4j-1.6.1.jar
jaxen-1.1-beta-6.jar
jdom.jar
此三jar包用于解析调用远程接口返回的xml数据，
很方便，例如：
package com.my.test;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
/**
* 如何调用接口
* @author
*
*/
public class AnalysisXml {
public static void main(String args[]) throws DocumentException
{
String appserverIp = "10.137.121.51";
String appserverPort="8060";
String rqestXml ="
<message><head><guid>mobile</guid></head><body><params><pwd>ads324sdsa4sf3w</pwd><callbacku
rl
/></params></body></message>";
//访问远程接口
String url = "http://" + appserverIp + ":" + appserverPort
+ "/eSpace/appserver/applogin.action";
String result = getHttp(rqestXml, url);
//返回xml数据并解析
Document doc = DocumentHelper.parseText(result);
String appid = doc.selectSingleNode("/message/body/params/appid").getText();
String tag = doc.selectSingleNode("/message/body/params/tag").getText();
String eid = doc.selectSingleNode("/message/body/params/eid").getText();
System.out.println(doc);
}
/**
* 发送http请求 并得到响应数据流
* @param str
* @param url
* @return data String
*/
public static String getHttp(String str, String url)
{
try
{
URL server = new URL(url);
HttpURLConnection httpConnection = (HttpURLConnection)server.openConnection();
httpConnection.setRequestProperty("Content-Type", "text/xml; charset=UTF-8");
httpConnection.setRequestProperty("Accept", "application/x-www-form-
urlencoded");
httpConnection.setRequestProperty("version", "100");
httpConnection.setConnectTimeout(120000);
httpConnection.setReadTimeout(120000);
httpConnection.setDoInput(true);
httpConnection.setDoOutput(true);
OutputStreamWriter out =
new OutputStreamWriter(new BufferedOutputStream
(httpConnection.getOutputStream()), "UTF-8");
out.write(str);
out.flush();
out.close();
byte[] msgBody = null;
DataInputStream dis = new DataInputStream(httpConnection.getInputStream());
int length = httpConnection.getContentLength();
//正常设置了Content-Length的值
if (length >= 0)
{
msgBody = new byte[length];
dis.readFully(msgBody);
}
// 未设置值
else
{
byte[] temp = new byte[1024];
int n = 0;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
while ((n = dis.read(temp)) != -1)
{
bos.write(temp, 0, n);
}
msgBody = bos.toByteArray();
bos.close();
}
dis.close();
String data = new String(msgBody, "UTF-8").trim();
httpConnection.disconnect();
return data;
}
catch (MalformedURLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (UnsupportedEncodingException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}