• java读取XML文件的四种方式


    java读取XML文件的四种方式

    Xml代码 复制代码
    1. <?xml version="1.0" encoding="GB2312"?>  
    2. <RESULT>  
    3. <VALUE>     
    4.   <NO>A1234</NO>     
    5.   <ADDR>河南省郑州市</ADDR>  
    6. </VALUE>  
    7. <VALUE>     
    8.   <NO>B1234</NO>     
    9.   <ADDR>河南省郑州市二七区</ADDR>  
    10. </VALUE>  
    11. </RESULT>  
    第一种 DOM 实现方法 import java.io.File; import javax.xml.parsers.D
     

     xml文件  <?xml version="1.0" encoding="GB2312"?>
      <RESULT>
      <VALUE>
      <NO>A1234</NO>
      <ADDR>四川省XX县XX镇XX路X段XX号</ADDR>
      </VALUE>
      <VALUE>
      <NO>B1234</NO>
      <ADDR>四川省XX市XX乡XX村XX组</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;
      public class MyXMLReader2DOM {
      public static void 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.*;
      public class MyXMLReader2DOM4J {
      public static void 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.*;
      public class MyXMLReader2JDOM {
      public static void 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;
      public class MyXMLReader2SAX extends DefaultHandler {
      java.util.Stack tags = new java.util.Stack();
      public MyXMLReader2SAX() {
      super();
      }
      public static void 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");
      }
      public void 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));
      }
      }
      public void startElement(String uri, String localName, String qName,
      Attributes attrs) {
      tags.push(qName);
      }
      }

  • 相关阅读:
    sqlhelper中事务的简单用法(初学者)
    sqlhelper中事务的简单用法(初学者)
    sqlhelper中事务的简单用法(初学者)
    【】SQlServer数据库生成简单的说明文档小工具(附源码)
    【】SQlServer数据库生成简单的说明文档小工具(附源码)
    一种M2M业务的架构及实现M2M业务的方法
    【】SQlServer数据库生成简单的说明文档小工具(附源码)
    程序员搜索技巧
    通用的Sql存储过程
    python安装过程的一些问题解决方案
  • 原文地址:https://www.cnblogs.com/timssd/p/4831077.html
Copyright © 2020-2023  润新知