Java如何修改xml内容

发布网友发布时间：2023-01-01 00:38

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热心网友时间：2023-11-05 12:41

xml: <?xml version="1.0" encoding="UTF-8"?> <users> <Messages> <sendName>sendUsers</sendName> <receiveName>snake</receiveName> <date>2007-12-04 12:20:00</date> <status>0</status> <message>this is Content</message> </Messages> </users> java: package com.lianxi.DAO; import java.io.File; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.transform.Transformer; 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.Node; import org.w3c.dom.NodeList; public class UpdateXml { public static boolean doc2XmlFile(Document document,String filename) { boolean flag = true; try { /** 将document中的内容写入文件中 */ TransformerFactory tFactory = TransformerFactory.newInstance(); Transformer transformer = tFactory.newTransformer(); /** 编码 */ //transformer.setOutputProperty(OutputKeys.ENCODING, "GB2312"); DOMSource source = new DOMSource(document); StreamResult result = new StreamResult(new File(filename)); transformer.transform(source, result); }catch(Exception ex) { flag = false; ex.printStackTrace(); } return flag; } public static Document load(String filename) { Document document = null; try { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder=factory.newDocumentBuilder(); document=builder.parse(new File(filename)); document.normalize(); } catch (Exception ex){ ex.printStackTrace(); } return document; } /** * 演示修改文件的具体某个节点的值 */ public static void xmlUpdateDemo() { Document document = load("c://Message.xml"); Node root=document.getDocumentElement(); /** 如果root有子元素 */ if(root.hasChildNodes()) { /** ftpnodes */ NodeList ftpnodes = root.getChildNodes(); /** 循环取得ftp所有节点 */ for (int i=0;i<ftpnodes.getLength();i++) { NodeList ftplist = ftpnodes.item(i).getChildNodes(); for (int k=0;k<ftplist.getLength();k++) { Node subnode = ftplist.item(k); /** 删除ftp-chn节点 */ // if (subnode.getNodeType()==Node.ELEMENT_NODE&&subnode.getNodeName()=="ftp-chn") // { // ftpnodes.item(i).removeChild(subnode); // } /** 修改ftp-host的值为 192.168.0.1 */ if (subnode.getNodeType()==Node.ELEMENT_NODE&&subnode.getNodeName()=="status") { subnode.getFirstChild().setNodeValue("1"); } } } } doc2XmlFile(document,"c://Message.xml"); } public static void main(String args[])throws Exception { UpdateXml.xmlUpdateDemo(); } }