java读取xml文件的四种方法

<?xmlversion="1.0"encoding="GB2312"?>
<RESULT>
<VALUE>
<NO>A1234</NO>
<ADDR>河南省郑州市</ADDR>
</VALUE>
<VALUE>
<NO>B1234</NO>
<ADDR>河南省郑州市二七区</ADDR>
</VALUE>
</RESULT>

<?xmlversion="1.0"encoding="GB2312"?>
<RESULT>
<VALUE>
<NO>A1234</NO>
<ADDR>河南省郑州市</ADDR>
</VALUE>
<VALUE>
<NO>B1234</NO>
<ADDR>河南省郑州市二七区</ADDR>
</VALUE>
</RESULT>

第一种 DOM 实现方法：

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

publicclass MyXMLReader2DOM {
publicstaticvoid main(String arge[]) {

long lasting = System.currentTimeMillis();

try {
   File f = new File("data_10k.xml");
   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
   DocumentBuilder builder = factory.newDocumentBuilder();
   Document doc = builder.parse(f);
   NodeList nl = doc.getElementsByTagName("VALUE");
for (int i = 0; i < nl.getLength(); i++) {
    System.out.print("车牌号码:"+ doc.getElementsByTagName("NO").item(i).getFirstChild().getNodeValue());
    System.out.println("车主地址:"+ doc.getElementsByTagName("ADDR").item(i).getFirstChild().getNodeValue());
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

publicclass MyXMLReader2DOM {
publicstaticvoid main(String arge[]) {

long lasting = System.currentTimeMillis();

try {
   File f = new File("data_10k.xml");
   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
   DocumentBuilder builder = factory.newDocumentBuilder();
   Document doc = builder.parse(f);
   NodeList nl = doc.getElementsByTagName("VALUE");
for (int i = 0; i < nl.getLength(); i++) {
    System.out.print("车牌号码:"+ doc.getElementsByTagName("NO").item(i).getFirstChild().getNodeValue());
    System.out.println("车主地址:"+ doc.getElementsByTagName("ADDR").item(i).getFirstChild().getNodeValue());
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

第二种，DOM4J实现方法：

import java.io.*;
import java.util.*;
import org.dom4j.*;
import org.dom4j.io.*;

publicclass MyXMLReader2DOM4J {
publicstaticvoid main(String arge[]) {
long lasting = System.currentTimeMillis();
try {
   File f = new File("data_10k.xml");
   SAXReader reader = new SAXReader();
   Document doc = reader.read(f);
   Element root = doc.getRootElement();
   Element foo;
for (Iterator i = root.elementIterator("VALUE"); i.hasNext();) {
    foo = (Element) i.next();
    System.out.print("车牌号码:" + foo.elementText("NO"));
    System.out.println("车主地址:" + foo.elementText("ADDR"));
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

import java.io.*;
import java.util.*;
import org.dom4j.*;
import org.dom4j.io.*;

publicclass MyXMLReader2DOM4J {
publicstaticvoid main(String arge[]) {
long lasting = System.currentTimeMillis();
try {
   File f = new File("data_10k.xml");
   SAXReader reader = new SAXReader();
   Document doc = reader.read(f);
   Element root = doc.getRootElement();
   Element foo;
for (Iterator i = root.elementIterator("VALUE"); i.hasNext();) {
    foo = (Element) i.next();
    System.out.print("车牌号码:" + foo.elementText("NO"));
    System.out.println("车主地址:" + foo.elementText("ADDR"));
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

第三种 JDOM实现方法：

import java.io.*;
import java.util.*;
import org.jdom.*;
import org.jdom.input.*;

publicclass MyXMLReader2JDOM {
publicstaticvoid main(String arge[]) {
long lasting = System.currentTimeMillis();
try {
   SAXBuilder builder = new SAXBuilder();
   Document doc = builder.build(new File("data_10k.xml"));
   Element foo = doc.getRootElement();
   List allChildren = foo.getChildren();
for (int i = 0; i < allChildren.size(); i++) {
    System.out.print("车牌号码:"+ ((Element) allChildren.get(i)).getChild("NO").getText());
    System.out.println("车主地址:"+ ((Element) allChildren.get(i)).getChild("ADDR").getText());
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

import java.io.*;
import java.util.*;
import org.jdom.*;
import org.jdom.input.*;

publicclass MyXMLReader2JDOM {
publicstaticvoid main(String arge[]) {
long lasting = System.currentTimeMillis();
try {
   SAXBuilder builder = new SAXBuilder();
   Document doc = builder.build(new File("data_10k.xml"));
   Element foo = doc.getRootElement();
   List allChildren = foo.getChildren();
for (int i = 0; i < allChildren.size(); i++) {
    System.out.print("车牌号码:"+ ((Element) allChildren.get(i)).getChild("NO").getText());
    System.out.println("车主地址:"+ ((Element) allChildren.get(i)).getChild("ADDR").getText());
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

第四种SAX实现方法：

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

publicclass MyXMLReader2SAX extends DefaultHandler {

 java.util.Stack tags = new java.util.Stack();

public MyXMLReader2SAX() {
super();
 }

publicstaticvoid main(String args[]) {
long lasting = System.currentTimeMillis();
try {
   SAXParserFactory sf = SAXParserFactory.newInstance();
   SAXParser sp = sf.newSAXParser();
   MyXMLReader2SAX reader = new MyXMLReader2SAX();
   sp.parse(new InputSource("data_10k.xml"), reader);
  } catch (Exception e) {
   e.printStackTrace();
  }

  System.out.println("运行时间：" + (System.currentTimeMillis() - lasting)
    + "毫秒");
 }

publicvoid characters(char ch[], int start, int length)
throws SAXException {
  String tag = (String) tags.peek();
if (tag.equals("NO")) {
   System.out.print("车牌号码：" + new String(ch, start, length));
  }
if (tag.equals("ADDR")) {
   System.out.println("地址:" + new String(ch, start, length));
  }
 }

publicvoid startElement(String uri, String localName, String qName,
   Attributes attrs) {
  tags.push(qName);
 }
}