Java Operation XML

XML file

<template><task id= "DDD" >aaa</task></template>

Building the DOM

Import Javax.xml.parsers.documentbuilder;import Javax.xml.parsers.documentbuilderfactory;import Org.w3c.dom.Document,-----------------------documentbuilderfactory factory = Documentbuilderfactory.newinstance () ;D Ocumentbuilder builder = factory.newdocumentbuilder ();D ocument doc = Builder.parse (This.getclass (). getResourceAsStream ("/template.xml"));//This refers to the SRC directory

add element

Element element = doc.createelement ("task");//Create Elements Element.setattribute ("id", "AAA");//Add Attribute Element.appendchild ( Doc.createtextnode ("DDD"));//Add Text node Doc.getdocumentelement (). appendchild (element);//append to the root node element transformerfactory Tfactory =transformerfactory.newinstance (); Transformer Transformer = Tfactory.newtransformer ();D omsource Source = new Domsource (DOC); Streamresult result = new Streamresult (New FileOutputStream (This.getclass (). GetResource ("/template.xml"). GetPath ()) ); Transformer.transform (source, result);//write to File

Delete Element

Doc.getdocumentelement (). RemoveChild (Doc.getelementsbytagname ("task"). Item (0));// Delete the first task element in the root node transformerfactory tfactory =transformerfactory.newinstance (); Transformer Transformer = Tfactory.newtransformer (); Msource Source = new Domsource (DOC); Streamresult result = new Streamresult (New FileOutputStream (This.getclass (). GetResource ("/template.xml"). GetPath ()) ); Transformer.transform (source, result);//write to File

modifying elements

Doc.getelementsbytagname ("task"). Item (0). Getfirstchild (). setNodeValue ("CCC");// Modifies the contents of the first task element transformerfactory tfactory =transformerfactory.newinstance (); Transformer Transformer = Tfactory.newtransformer (); Omsource Source = new Domsource (DOC); Streamresult result = new Streamresult (New FileOutputStream (This.getclass (). GetResource ("/template.xml"). GetPath ()) ); Transformer.transform (source, result);//write to File

viewing elements

NodeList tasks = Doc.getdocumentelement (). Getchildnodes (); for (int i = 0;i < Tasks.getlength (); i++) { System.out.println ((Element) Tasks.item (i)). getattribute ("id"));//The id attribute value of the output element System.out.println (Tasks.item (i). Getnodevalue);//output element's content value}

Java Operation XML