dom4j 的使用

dom4j 的使用

package com.sunrise.ocs.webservice.unicom.test;

import java.io.File;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Iterator;

import javax.xml.parsers.DocumentBuilderFactory;

import org.apache.log4j.Logger;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.XPath;
import org.dom4j.io.SAXReader;

import com.sun.org.apache.xml.internal.serialize.OutputFormat;
import com.sun.org.apache.xml.internal.serialize.XMLSerializer;

public class TestDom4j {
 private static final Logger log = Logger.getLogger(TestDom4j.class);

 private static long bt;

 public static void main(String[] args) {
  String strXml = "";
  int b = 0;
  String file1 = "xml/CreateUserRequest.xml";
  String file2 = "xml/CancelUserRequest.xml";
  if(b==0){
   bt = System.currentTimeMillis();
   strXml = xmlFile2String(file1);
   if (log.isDebugEnabled()) {
    log.debug("\nxmlFile2String() use time: "
      + (System.currentTimeMillis() - bt) + " millis\n");
   }
  }else{
   bt = System.currentTimeMillis();
   strXml = xmlFile2String2(file1);
   if (log.isDebugEnabled()) {
    log.debug("\nxmlFile2String2() use time: "
      + (System.currentTimeMillis() - bt) + " millis\n");
   }
  }

  if(b==0){
   bt = System.currentTimeMillis();
   findElement4XPath1(strXml);
   if (log.isDebugEnabled()) {
    log.debug("\nfindElement4XPath1() use time: "
      + (System.currentTimeMillis() - bt) + " millis\n");
   }
  }else{
   bt = System.currentTimeMillis();
   findElement4XPath2(strXml);
   if (log.isDebugEnabled()) {
    log.debug("\nfindElement4XPath2() use time: "
      + (System.currentTimeMillis() - bt) + " millis\n");
   } 
   
  }
 }

 public static void findElement4XPath1(String xml) {
  try {
   String str = delNamespace4Pattern(xml);
   Document doc = DocumentHelper.parseText(str);
   Element e = (Element) doc.selectSingleNode("//CreateUserRequest/RequestMessage/MessageHeader");
   if (e != null) {
    Iterator iter = e.elementIterator();
    while (iter.hasNext()) {
     Element sub = (Element) iter.next();
     log.debug("\n" + sub.getText() + "\n");
    }
   }
   
   /* 读取属性的例子
   List childNodes = doc.selectNodes("//Config/Child/ChildNode");
         for(Object obj:childNodes) {
             Node childNode = (Node)obj;
             String name = childNode.valueOf("@name"); //读取属性
             String text = childNode.getText();
         }
         */

   
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
 public static void findElement4XPath2(String xml) {
  try {
   Document doc = DocumentHelper.parseText(xml);
   Element root = doc.getRootElement();
   
   HashMap map = new HashMap();
   map.put("tns", "http://bme.sunrise.com/unicom/gd");
   XPath x = doc.createXPath("//tns:CreateUserRequest/tns:RequestMessage/tns:MessageHeader");
   x.setNamespaceURIs(map);
   
   Element e = (Element) x.selectSingleNode(doc);
   if (e != null) {
    Iterator iter = e.elementIterator();
    while (iter.hasNext()) {
     Element sub = (Element) iter.next();
     if (log.isDebugEnabled()) {
      log.debug("\n" + sub.getText() + "\n");
     }
    }
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }

 public static Document xml2Document(String xml) {
  try {
   return DocumentHelper.parseText(xml);
  } catch (Exception e) {
   e.printStackTrace();
  }
  return null;
 }

 public static String xmlFile2String(String xmlFile) {
  try {
   return new SAXReader().read(new File(xmlFile)).asXML();
  } catch (Exception e) {
   e.printStackTrace();
  }
  return null;
 }
 
 //读取xml文件为xml串
 public static String xmlFile2String2(String xmlFile) {
  try {
   org.w3c.dom.Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(xmlFile); 
   OutputFormat format = new OutputFormat(document);
   //format.setEncoding("UTF-8");
   StringWriter stringOut = new StringWriter();
   XMLSerializer serial = new XMLSerializer(stringOut, format);
   serial.asDOMSerializer();
   serial.serialize(document.getDocumentElement());
   return stringOut.toString();
  } catch (Exception e) {
   e.printStackTrace();
  }
  return "";
 }
 
 
 public static String delNamespace4Pattern(String xml){
  String result = "";
  try {
   result = xml.replaceFirst("xmlns([^ ]*)=([^ ]*)http([^>^\"]*)\"", "");
  } catch (Exception e) {
   e.printStackTrace();
  }
  return result;
  
 }

 

}