e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
package com.brucezhang.xmltest;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
public class MyDom_Update {
/**
* @param index 修改值的标签索引
* @param count 修改的是第几个值
* @param value 修改的目标值
* @param outOrno 是否输出XML文件内容
*
* @author DLUTBruceZhang
* */
public void update(String index, int count, String value, boolean outOrno) {
Document document = null;
try {
document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse("my_xml.xml");
Element root = document.getDocumentElement();
root.getElementsByTagName(index).item(count).setTextContent(value);
output(root, "my_xml.xml");
if (outOrno) {
System.out.println("-------------------------使用DOM方法输出-------------------------");
output(root, null);
}
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//写回XML文件，保存修改或打印到控制台
public static void output(Node node, String filename) {
TransformerFactory transFactory = TransformerFactory.newInstance();
try {
Transformer transformer = transFactory.newTransformer();
// 设置各种输出属性
transformer.setOutputProperty("encoding", "gb2312");
transformer.setOutputProperty("indent", "yes");
DOMSource source = new DOMSource();
// 将待转换输出节点赋值给DOM源模型的持有者(holder)
source.setNode(node);
StreamResult result = new StreamResult();
if (filename == null) {
// 设置标准输出流为transformer的底层输出目标
result.setOutputStream(System.out);
} else {
result.setOutputStream(new FileOutputStream(filename));
}
// 执行转换从源模型到控制台输出流
transformer.transform(source, result);
} catch (TransformerConfigurationException e) {
e.printStackTrace();
} catch (TransformerException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
最后，我们需要测试这段代码能不能用，我们编写下主测试程序：
[java]
package com.brucezhang.xmltest;
public class Main_Test {
/**
* @param args
* Author:DLUTBruceZhang
*/
public static void main(String[] args){
// TODO Auto-generated method stub
//修改XML文件
// 目标文件
//
//
//
//
//
//
//