关于使用jdom得到xml文件的结构树！！

XiongXu0608 2007-06-26 04:08:37

由于没有xml的DTD需要分析xml的结构
不知道使用jdom怎么样得到xml的结构树了
不知道各位GGJJ有没有示例程序能借鉴一下，小弟感激不尽

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seaforce 2007-12-07

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package run;

import org.jdom.*;

import org.jdom.output.*;

import java.io.*;

public class WriteXML{

    public void BuildXML() throws Exception {

        Element root,student,number,name,age,firstname,lastname;         

        root = new Element("student-info"); //生成根元素：student-info

        student = new Element("student"); //生成元素：student(number,name,age)                             

        number = new Element("number");

        name = new Element("name");

        age = new Element("age");

        firstname = new Element("firstname");

        lastname = new Element("lastname");

        Document doc = new Document(root); //将根元素植入文档doc中

        root.setText("root_name");

        number.setText("001");

        firstname.setText("yu");

        lastname.setText("haiming");

        age.setText("24");

        student.addContent(number);

        student.addContent(name);

        student.addContent(age);

        name.addContent(firstname);

        name.addContent(lastname);

        root.addContent(student);

        

        root.setAttribute("width", "100%");

        root.setAttribute("height", "860px");

        root.setAttribute("bgcolor", "red");

        root.setAttribute("name", "student");

        Format format = Format.getCompactFormat();

        format.setEncoding("gb2312"); //设置xml文件的字符为gb2312

        format.setIndent("    "); //设置xml文件的缩进为4个空格

        XMLOutputter XMLOut = new XMLOutputter(format);//元素后换行一层元素缩四格 

        XMLOut.output(doc, new FileOutputStream("studentinfo.xml"));  

}

    public static void main(String[] args) throws Exception {

        WriteXML w = new WriteXML();

        System.out.println("Now we build an XML document .....");

        w.BuildXML();

        System.out.println("finished!");

}

}

seaforce 2007-12-07

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package run;

import org.jdom.*;

import org.jdom.input.*;

import java.io.*;

import java.util.*;;

public class jdomTest {

	 public void jdomtest() {

		    String textXml = null;

		    textXml = "<note width="+"\"100%\""+">";

		    textXml = textXml +

		        "<to><to1>a111</to1><to2>a222</to2><to3>a333</to3></to><from>bbb</from><heading>ccc</heading><body>ddd</body>";

		    textXml = textXml + "</note>";

		    System.out.println(textXml);

		    SAXBuilder builder = new SAXBuilder();

		    Document doc = null;

		    Reader in= new StringReader(textXml);

		    try {

		      doc = builder.build(in);

		      

		      Element root = doc.getRootElement();

		      System.out.println(root.getAttributeValue("width"));

		      List ls = root.getChildren();//注意此处取出的是root节点下面的一层的Element集合

		      for (Iterator iter = ls.iterator(); iter.hasNext(); ) {

		         Element el = (Element) iter.next();

		         if(el.getName().equalsIgnoreCase("to")){

		        	 List ls2 = el.getChildren();

		        	 for(Iterator iter2 = ls2.iterator(); iter2.hasNext();){		        		 

		        		 Element e2 = (Element)iter2.next();

		        		 if(e2.getTextTrim().equals("to1")){

		        			 e2.setText("I have bean changed in this element.");

		        			 System.out.println(e2.getName());

		        			 continue;

		        		 }

		        		 System.out.println(e2.getName());

		        	 }

		        	 continue;

		         }

		         System.out.println(el.getText());

		        

		      }

		    }

		    catch (IOException ex) {

		      ex.printStackTrace();

		    }

		    catch (JDOMException ex) {

		      ex.printStackTrace();

		    }

		  }



}

yayyeah 2007-12-03

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dtd只是规范xml文档，dom在没有dtd的时候照样可以按照他自己的方式解析文档

mx1029 2007-06-26

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package com.icbridge.mx.util;

import java.io.*;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.output.XMLOutputter;
import org.apache.log4j.Logger;
import com.icbridge.mx.dbc.OracleDBC;

public class XmlWriter {

private static Logger logger = Logger.getLogger(XmlWriter.class);

public XmlWriter(){

}
/**
*
* @Author: Gary.M
* @Date: 2007-04-11 上午09:44:24
* @param sql
* @param parentElement 父级Element名
* @param childElement 子Element名
* @param fileName 最终生成的(xml)文件名(包括路径)如："d:\\data.xml"
* @return
*/
public boolean isCreate(String sql,String parentElement,String childElement,String fileName){

boolean isDone = true;
OracleDBC dbc = null;
Connection con = null;
ResultSet rs = null;
PreparedStatement pstmt = null;
ResultSetMetaData rsmd = null;
int numberOfColumns = 0;
Document document=new Document(new Element(parentElement));//创建文档

try
{
dbc = new OracleDBC();
con = dbc.getConnection();
pstmt = con.prepareStatement(sql);
rs = pstmt.executeQuery();
rsmd = rs.getMetaData(); //获取字段名
numberOfColumns = rsmd.getColumnCount(); //获取字段数

if(rs == null)
{
logger.info("无法取得记录集！");
isDone = false;
}
else
{
int i=0;
while(rs.next())//将查询结果取出
{
Element element0=new Element(childElement); //创建元素生成JDOM树
document.getRootElement().addContent(element0);
for(i=1; i<=numberOfColumns;i++)
{
String date = rs.getString(i);
//new String(rs.getString(i).getBytes("ISO-8859-1"),"gb2312"); //代码转换
Element element = new Element(rsmd.getColumnName(i)).setText(date);
element0.addContent(element);
}
}
}
rs.close();
pstmt.close();

}catch(Exception e)
{
logger.error("数据库操作失败！"+e);
}
finally
{
dbc.close();
}
XMLOutputter outp = new XMLOutputter();

try
{
outp.output(document, new FileOutputStream(fileName)); //输出XML文档
}
catch(IOException e)
{
logger.error("XML 文档生成失败！"+e);
}
logger.info("XML 文档生成完毕！");

return isDone;
}

}