求java读写XML的例子。谢谢。给分100。

Question

还要java读写xml数据库的。再次谢过。

Answer 1

http://dev.csdn.net/article/20/20721.shtm

Answer 2

给你两个地址，自己去看吧DOM4J 使用简介 http://icecloud.51.net/blog/archives/000009.html 
使用 dom4j 解析 XML http://www-900.ibm.com/developerWorks/cn/xml/x-dom4j.shtml

Answer 3

http://blog.csdn.net/mail25/archive/2004/07/07/36040.aspx
SAX方法,读取的速度比较快啊!
DOM的也有,就是找不到放哪了!郁闷

Answer 4

下面这是个写XML的,不过是基于GUI的,道理是一样嘛!
===============================================
要导入
import javax.xml.parsers.*;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
才行
 private void saveData(){
     String DES ;
       try{
        DocumentBuilderFactory factory =  DocumentBuilderFactory.newInstance();
        DocumentBuilder builder =  factory.newDocumentBuilder();
        Document document = builder.newDocument();
        // Create DOM Tree
        Element root = document.createElement("AimsLicense");
        document.appendChild(root);
        Element Company = document.createElement("Company");
        Element ComInfo = document.createElement("ComInfo");
        Element UseInfo = document.createElement("UseInfo");
        Element OthInfo = document.createElement("OthInfo");
        root.appendChild(Company);
        Element NameLong = document.createElement("NameLong");
        Element NameShort = document.createElement("NameShort");
        Element Location = document.createElement("Location");
        Element Address = document.createElement("Address");
        Element TermDate = document.createElement("TermDate");
        Element Contact = document.createElement("Contact");
        Element ContactMail = document.createElement("ContactMail");
        Element IssueDate = document.createElement("IssueDate");
        Element UserNum = document.createElement("UserNum");
        Element PassDue = document.createElement("PassDue");
        Element LicEnc = document.createElement("LicEnc");
        Element SoftwareName = document.createElement("SoftwareName");
        Element ComponentName = document.createElement("ComponentName");
        Element SoftekMail = document.createElement("SoftekMail");
        Company.appendChild(ComInfo);
        Company.appendChild(UseInfo);
        Company.appendChild(OthInfo);        ComInfo.appendChild(NameLong);
        ComInfo.appendChild(NameShort);
        ComInfo.appendChild(Location);
        ComInfo.appendChild(Address);        UseInfo.appendChild(Contact);
        UseInfo.appendChild(ContactMail);
        UseInfo.appendChild(TermDate);
        UseInfo.appendChild(IssueDate);
        UseInfo.appendChild(UserNum);
        UseInfo.appendChild(PassDue);        OthInfo.appendChild(SoftwareName);
        OthInfo.appendChild(ComponentName);
        OthInfo.appendChild(SoftekMail);
        OthInfo.appendChild(LicEnc);        DES = LicenseAdmin.getInstance().LicenseEnc(txtLong.getText()+txtTerm.getText()+txtUser.getText()+txtPass.getText()+txtSoftek.getText()+txtSoft.getText()+txtCompo.getText());        NameLong.appendChild(document.createTextNode(txtLong.getText()));
        NameShort.appendChild(document.createTextNode(txtShort.getText()));
        Location.appendChild(document.createTextNode(txtLocation.getText()));
        Address.appendChild(document.createTextNode(txtAddress.getText()));
        Contact.appendChild(document.createTextNode(txtContact.getText()));
        ContactMail.appendChild(document.createTextNode(txtContactMail.getText()));
        TermDate.appendChild(document.createTextNode(txtTerm.getText()));
        IssueDate.appendChild(document.createTextNode(txtIssue.getText()));
        UserNum.appendChild(document.createTextNode(txtUser.getText()));
        PassDue.appendChild(document.createTextNode(txtPass.getText()));
        SoftwareName.appendChild(document.createTextNode(txtSoft.getText()));
        ComponentName.appendChild(document.createTextNode(txtCompo.getText()));
        SoftekMail.appendChild(document.createTextNode(txtSoftek.getText()));        LicEnc.appendChild(document.createCDATASection(DES));        if(LicenseAdmin.getInstance().generateLicXML(document)){
          JOptionPane.showConfirmDialog(this, "生成License文件成功,请查看!", "提示信息",
                                        JOptionPane.DEFAULT_OPTION,
                                        JOptionPane.INFORMATION_MESSAGE);
        }else{
          JOptionPane.showConfirmDialog(this, "生成License文件失败,请查看!", "错误信息",
                                        JOptionPane.DEFAULT_OPTION,
                                        JOptionPane.WARNING_MESSAGE);
        }       }catch(Exception e){ e.printStackTrace(); }   }====================================
读的方法在这
  private DocumentBuilderFactory factory;
  private DocumentBuilder builder;
  private Document doc;
  private int Days;  private static final String BASEDIR="app.basedir";//web.xml中指定了初始化目录的地址,也可以用String指定,不用Properties属性
  private static final String SEPARATOR="file.separator";//不同操作系统中的分隔符
  private  String file_uri = "";    Properties properties = System.getProperties();
    String separator = properties.getProperty(SEPARATOR);
    file_uri = softeksystem.com.PropertyMgr.getInstance().getProperty(BASEDIR);
    file_uri = file_uri.concat("AimsLicense.xml");
    try {
      factory = DocumentBuilderFactory.newInstance();
      builder = factory.newDocumentBuilder();
      doc = builder.parse(file_uri);//这个doc可以取代上面新产生的那个,做为读入的,然后可以进行相应的修改,上面是的GUI用的!
有点乱,不知道能看明白了!
    }catch(Ex

Answer 5

package xml;import javax.xml.parsers.*;
import org.w3c.dom.*;
import java.io.*;
//import java.lang.String;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.FactoryConfigurationError;
 import javax.xml.parsers.ParserConfigurationException;
 import org.xml.sax.SAXException;
 import org.xml.sax.SAXParseException;
 import java.io.File;
 import java.io.IOException; import org.w3c.dom.*;
public class Xml{
  private Element e;
  Node[] tagNode;
  Node[] proNode;
  private String[] tagNameList;
  private String[] proNameList;
  //set xml's object from xml's name
  public void xmlObj(String name) {
    try{
      DocumentBuilderFactory dof=DocumentBuilderFactory.newInstance();
      DocumentBuilder db=dof.newDocumentBuilder();
      Document document = db.parse(new File(name));
      e = document.getDocumentElement();
    }
    catch(Exception e){
      System.out.println("file's Exception");
    }  }  //get xml's object
  public Element getElement(){
    System.out.println(e);
    return e;
  }
 /**
  //set tag's name by tagNode
  public void setTag(String eleName){
    Element el = getElement();
    int length = el.getElementsByTagName(eleName).getLength();
    tagNode = new Node[length];
    int loop;
    for(loop = 0;loop < length;loop++){
      tagNode[loop] = el.getElementsByTagName(eleName).item(loop);
      System.out.println(tagNode[loop]);
    }
  }  //get tag's name from tagNode
  public Node[] getTag(){    return tagNode;  }
**/  //set tag's name by tagNameList
  public void setTagName(String name) {
    try{
    //this.name = name;
    //xml.xmlObj("Tag.xml");
    int length = e.getElementsByTagName("tag").getLength();
    tagNameList = new String[length];
    for(int loop = 0;loop < length;loop++){
      tagNameList[loop] = e.getElementsByTagName("tag").item(loop).getAttributes().getNamedItem(name).getNodeValue();
      System.out.println(tagNameList[loop]);
    }
    //for(int step = 0;step<nameList.length;step++)
      //System.out.println(nameList[step]);
  }
  catch(Exception e){
    System.out.println(e);
  }
 }  //get tag's name from tagNameList
  public String[] getTagName(){
   // System.out.println(nameList[0]);
    return tagNameList;  }//  public void setPro(String tagName,String proName){
//    setTag(tagName);
//    tagNode = getTag();
    //tagNode[0].getChildNodes();
//    System.out.println(tagNode[2].getAttributes());//getChildNodes().item(2).getOwnerDocument().getElementsByTagName("property").item(6).getNodeName());//.getNodeType());
//  }
  //public Node getPro(){  //}  //set property's name by proName
  public void setPro(String proName){
   try{
     DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
     DocumentBuilder builder = factory.newDocumentBuilder();
     Document document = builder.parse( new File("g:/hyper editor/Tag.xml") );
     NodeList listProperty = document.getElementsByTagName("tag");
     for (int i=0; i< listProperty.getLength(); i++){
         Node node = listProperty.item(i);
         NamedNodeMap attrs = node.getAttributes();
         Node attrNode = attrs.item(0);
         String attrValue = attrNode.getNodeValue();
         /////////////!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!///////////
         if(attrValue.equals(proName)){
             NodeList childs = node.getChildNodes() ;
             int a = 0;
             for (int j=0; j< childs.getLength(); j++){
                 Node current = childs.item(j);
                 if(current.getNodeType() == current.ELEMENT_NODE){
                     NamedNodeMap propertyAttrs = current.getAttributes();
                     Node proprtyattrNode = propertyAttrs.item(0);
                     //String proList = proprtyattrNode.getNodeValue();
                     String[] proList = new String[100];
                     for(int loop = 0;loop < proList.length; loop ++)
                     proList[loop] = proprtyattrNode.getNodeValue();
                     //proListName[0] = proList;
                     //           System.out.println(proList);
                     //System.out.print(proprtyattrNode.getNodeValue() +"  = ");                     Node fisrtchild = current.getFirstChild();
                     if(fisrtchild != null){
                         String value = fisrtchild.getNodeValue();
                         //System.out.println(value);
                      }
                      //       else
                      //          System.out.println("no value exists");
                      if(proList != null){                          System.out.println(proList[4]);
                          //proListName[loop++] = proList;
                          //System.out.println(proListName[loop++]);
                      }
                  }
              }
          }
      }   }
   catch (SAXParseException spe) {          // Error generated by the parser
             System.out.println("\n** Parsing error"
                               + ", line " + spe.getLineNumber()
                               + ", uri " + spe.getSystemId());
             System.out.println("   " + spe.getMessage() );          // Use the contained exception, if any
             Exception  x = spe;
             if (spe.getException() != null)
                x = spe.getException();
             x.printStackTrace();    }    catch (SAXException sxe) {          // Error generated during parsing
             Exception  x = sxe;
             if (sxe.getException() != null)
                x = sxe.getException();
             x.printStackTrace();    }    catch (ParserConfigurationException pce) {          // Parser with specified options can't be built
             pce.printStackTrace();    }    catch (IOException ioe) {          // I/O error
             ioe.printStackTrace();
    }
 } //get property's name from tag's name
 public String getPro(){
  // System.out.println(proListName[1]);
  // return proListName;
  return "hehehehhehehe";
 }
  public static void main(String args[]) throws Exception{
    Xml xml = new Xml();
    xml.xmlObj("g:/hyper editor/Tag.xml");
    //xml.getElement();
    xml.setTagName("name");
    xml.getTagName();
   //xml.setPro("tag","name");
    xml.setPro("Table");
 }/** thinking
  static Document document;

Answer 6

public static void main(String argv[])
    {
       try {
          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
          DocumentBuilder builder = factory.newDocumentBuilder();
          document = builder.parse( new File("tag.xml") );          NodeList listProperty = document.getElementsByTagName("tag");
          for (int i=0; i< listProperty.getLength(); i++)
          {             Node node = listProperty.item(i);
             NamedNodeMap attrs = node.getAttributes();
             Node attrNode = attrs.item(0);
             String attrValue = attrNode.getNodeValue();
             if(attrValue.equals("Table"))
             {
                NodeList childs = node.getChildNodes() ;
                for (int j=0; j< childs.getLength(); j++)
                {                   Node current = childs.item(j);
                   if(current.getNodeType() == current.ELEMENT_NODE)
                   {
                      NamedNodeMap propertyAttrs = current.getAttributes();
                      Node proprtyattrNode = propertyAttrs.item(0);
                      String proList = proprtyattrNode.getNodeValue();
                      System.out.println(proList);
        //System.out.print(proprtyattrNode.getNodeValue() +"  = ");                      Node fisrtchild = current.getFirstChild();
                      if(fisrtchild != null){
                         String value = fisrtchild.getNodeValue();
                         //System.out.println(value);
                      }
                      else
                         System.out.println("no value exists");
                   }                }             }          }       }          catch (SAXParseException spe) {          // Error generated by the parser
             System.out.println("\n** Parsing error"
                               + ", line " + spe.getLineNumber()
                               + ", uri " + spe.getSystemId());
             System.out.println("   " + spe.getMessage() );          // Use the contained exception, if any
             Exception  x = spe;
             if (spe.getException() != null)
                x = spe.getException();
             x.printStackTrace();          }          catch (SAXException sxe) {          // Error generated during parsing
             Exception  x = sxe;
             if (sxe.getException() != null)
                x = sxe.getException();
             x.printStackTrace();          }          catch (ParserConfigurationException pce) {          // Parser with specified options can't be built
             pce.printStackTrace();          }          catch (IOException ioe) {          // I/O error
             ioe.printStackTrace();
          }    }// main
/***************************************/
 /**
  public static void main(String args[]) throws Exception{
    DocumentBuilderFactory dof=DocumentBuilderFactory.newInstance();
    DocumentBuilder db=dof.newDocumentBuilder();
    Document d=db.parse(new File("Tag.xml"));
    Element e=d.getDocumentElement();//取根元素webapp
    System.out.println(e);
   // NodeList nl=e.getElementsByTagName("urlName");//取urlName元素列表
    NodeList nl=e.getElementsByTagName("tag");
    System.out.println(nl.item(0).getAttributes().getNamedItem("name").getNodeValue());
    NodeList nlChild = e.getElementsByTagName("pro");
    System.out.println(nlChild.item(0).getAttributes().getNamedItem("name").getNodeValue());    //nl.item(0)取的列表中第一\u9879
   // System.out.println(nl);  }
 */
}
里面有你要的方法，呵呵，自己慢慢整理一下把

Answer 7

疯了，狂贴代码！去下载个Digester (apache-jakarta)http://www.javayou.com/showlog.jspe?cat_id=-1&log_id=154http://www.javayou.com (Java自由人)