本文詳細介紹Java的文檔對象模型JDOM （Java Document Object Model）提供了一個完整的用於訪問基於Java的解決方案JDOM是用Java代碼控制輸出XML 數據來完成這項工作的在JDOM上明確規定了使用一個Java代碼如何修改XML文檔我們首先需要下載JDOM的壓縮文件並添加到項目庫文件夾中下面是對XML文件進行修改
samplexml
<root>
<firsttag tag=file>
<firstsubtag>first subtag</firstsubtag>
</firsttag>
<secondtag>second tag</secondtag>
</root>
下面的Java代碼用於更新或修改一個XML 文件
import javaioFile;
import javaioFileWriter;
import orgjdomDocument;
import orgjdomElement;
import orgjdominputSAXBuilder;
import orgjdomoutputXMLOutputter;
/**
* @author giftsam
*/
public class XMLModifier
{
/**
* This method is used to modify the datas of an XML file
*/
private void modifyXML()
{
try
{
/**
* Initializing the SAXBuilder class
*/
SAXBuilder builder = new SAXBuilder();
String filePath = E: + Fileseparator + xml + Fileseparator +samplexml;
Systemoutprintln(File path is: + filePath);
File file = new File(filePath);
if (fileexists())
{
Document document = (Document) builderbuild(file);
/**
* Get the root element from the document class instance and from the root element get all the child elements and
* replace the appropriate values
*/
Element root = documentgetRootElement();
Element firstElement = rootgetChild(firsttag);
f irstElementgetAttribute(tag)setValue(file);
firstElementgetChild(firstsubelement)setText(test);
Element secondElement = rootgetChild(secondtag);
secondElementsetText(This is the second tag);
/**
* Print the modified xml document
*/
String xmlFileData= new XMLOutputter()outputString(document);
Systemoutprintln(Modified XML file is : + xmlFileData);
/**
* Modify the orginal document using FileWritter
*/
FileWriter fileWriter = new FileWriter(file);
fileWriterwrite(des);
fileWriterclose();
}
else
{
Systemoutprintln(File does not exist);
}
}
catch (Exception ex)
{
exprintStackTrace();
}
}
public static void main(String argS[])
{
try
{
new XMLModifier()modifyXML();
}
catch (Exception ex)
{
exprintStackTrace();
}
}
}
下面的是修改後的XML文件
samplexml(Modified)
<root>
<firsttag tag=test>
<firstsubtag>This is the first sub tag</firstsubtag>
</firsttag>
<secondtag>This is the second tag</secondtag>
</root>
本文提供了一個JDOM用簡單的Java程序來修改XML文件的方法CT希望這篇文章能對大家有所幫助
原文名Java code to update an XML file using JDOM
From:http://tw.wingwit.com/Article/program/Java/hx/201311/25809.html
