DOM4j 解析xml

来源：互联网发布：dotamax周报怎么看数据编辑：程序博客网时间：2024/04/28 22:30

简述：

解析xml

（参考：http://7-sun.com/text/23790.html）

maven dependency

<dependency><groupId>maven</groupId><artifactId>dom4j</artifactId><version>1.7-20060614</version></dependency>

代码：

import java.io.BufferedReader;import java.io.ByteArrayInputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.util.Iterator;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.Element;import org.dom4j.io.SAXReader;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class ShortUrlUtil {private static Logger logger = LoggerFactory.getLogger(ShortUrlUtil.class);public static int TIMEOUT = 30 * 1000;public static String ENCODING = "UTF-8";public static void main(String[] args) {try{  URL url = new URL("http://api.189.cn/EMP/shorturl/long2short?");  HttpURLConnection connection = (HttpURLConnection)url.openConnection();  //POST Request Define:   connection.setDoOutput(true);connection.setDoInput(true);connection.setUseCaches(false);connection.setConnectTimeout(TIMEOUT);connection.setRequestMethod("POST");// POST paramsStringBuilder sbd = new StringBuilder();sbd.append("param=").append("param1");connection.getOutputStream().write(sbd.toString().getBytes());connection.connect();  // response stringString responseStr = getResponseStr(connection);System.out.println("response xml : \n" + responseStr);// process responseString res_message = getValueByKey_XML(responseStr, "res_message");System.out.println("\nget res_message: \n" + res_message);;}catch(IOException e){  e.printStackTrace();}}/** * XML 解析 * get value by key * @param replyText * @param key * @return */private static String getValueByKey_XML(String replyText, String key){String result = "";SAXReader reader = new SAXReader();ByteArrayInputStream bais = new ByteArrayInputStream(replyText.getBytes());Document doc = null;try {doc  =  reader.read(bais);} catch (DocumentException e) {// TODO Auto-generated catch blocke.printStackTrace();}Element root = doc.getRootElement();Iterator nodes = root.elementIterator();while(nodes.hasNext()){Element node = (Element) nodes.next();if(key.equals(node.getName())){result = node.getText();}}return result;}/** * 通过HttpConnection 获取返回的字符串 * @param connection * @return * @throws IOException */private static String getResponseStr(HttpURLConnection connection) throws IOException{StringBuffer result = new StringBuffer();int responseCode = connection.getResponseCode();if (responseCode == connection.HTTP_OK) {InputStream in = connection.getInputStream();BufferedReader reader = new BufferedReader(new InputStreamReader(in, ENCODING));String inputLine = "";while ((inputLine = reader.readLine()) != null) {result.append(inputLine);}}return String.valueOf(result);}}

输出：

0 0