本文实例讲解了java遍历读取xml文件内容的详细代码，分享给大家供大家参考，具体内容如下

package test; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.Iterator; import javax.xml.namespace.NamespaceContext; import javax.xml.namespace.QName; import javax.xml.stream.XMLInputFactory; import javax.xml.stream.XMLOutputFactory; import javax.xml.stream.XMLStreamException; import javax.xml.stream.XMLStreamReader; import javax.xml.stream.XMLStreamWriter; import org.apache.axiom.om.OMAbstractFactory; import org.apache.axiom.om.OMAttribute; import org.apache.axiom.om.OMComment; import org.apache.axiom.om.OMContainer; import org.apache.axiom.om.OMDataSource; import org.apache.axiom.om.OMDocType; import org.apache.axiom.om.OMDocument; import org.apache.axiom.om.OMElement; import org.apache.axiom.om.OMException; import org.apache.axiom.om.OMFactory; import org.apache.axiom.om.OMNamespace; import org.apache.axiom.om.OMProcessingInstruction; import org.apache.axiom.om.OMSourcedElement; import org.apache.axiom.om.OMText; import org.apache.axiom.om.OMXMLParserWrapper; import org.apache.axiom.om.impl.builder.StAXOMBuilder; import org.xml.sax.helpers.XMLReaderFactory; public class Axiomtest { public static void main(String[] args) throws FileNotFoundException, Throwable { // read xml FileInputStream xmlFile = new FileInputStream("line-item2.xml"); XMLStreamReader parser = XMLInputFactory.newInstance().createXMLStreamReader(xmlFile); // 还需要StAXOMBuilder对象 StAXOMBuilder builder = new StAXOMBuilder(parser); OMElement doc = builder.getDocumentElement(); // 读到<fool></fool> OMElement cre = doc.getFirstChildWithName(new QName("student")); //读到<student> OMElement cre1 = cre.getFirstChildWithName(new QName("id")); // 读到<id></id> System.out.println(cre1.getLocalName()+":"+cre1.getText()); cre1 = cre.getFirstChildWithName(new QName("name")); // 读到<name></name> System.out.println(cre1.getLocalName()+":"+cre1.getText()); cre1 = cre.getFirstChildWithName(new QName("age")); // 读到<age></age> System.out.println(cre1.getLocalName()+":"+cre1.getText()); cre1 = cre.getFirstChildWithName(new QName("sex")); // 读到<sex></sex> System.out.println(cre1.getLocalName()+":"+cre1.getText()); cre1 = cre.getFirstChildWithName(new QName("message")); // 读到<sex></sex> System.out.println(cre1.getLocalName()+":"+cre1.getText()); System.out.println("------------------------------1"); Iterator<OMElement> iter = doc.getChildElements(); while(iter.hasNext()){ OMElement temp = iter.next(); System.out.println("===================="); System.out.println(temp.getLocalName()); // System.out.println(temp.getText()); if(temp.getLocalName().equals("student")){ Iterator<OMElement> iter1 = temp.getChildElements(); System.out.println("----------------"); while(iter1.hasNext()){ OMElement temp1 = iter1.next(); System.out.println(temp1.getLocalName()+":"+temp1.getText()); } } } System.out.println("!!!!!!!!!!!!!"); FileInputStream file = new FileInputStream("line-item2.xml"); XMLStreamReader read = XMLInputFactory.newInstance().createXMLStreamReader(file); StAXOMBuilder sta = new StAXOMBuilder(read); OMElement all = sta.getDocumentElement(); Iterator<OMElement> ite1 = all.getChildElements(); while(ite1.hasNext()){ OMElement temp = ite1.next(); if(temp.getLocalName().equals("student")){ Iterator<OMElement> ite2 = temp.getChildElements(); while(ite2.hasNext()){ OMElement temp1 = ite2.next(); System.out.println(temp1.getLocalName()+":"+temp1.getText()); } } } // write xml OMFactory factory = OMAbstractFactory.getOMFactory(); //建立doc节点,doc节点会和下面的root节点合并 OMDocument dod = factory.createOMDocument(); //建立root节点 OMElement root = factory.createOMElement("root","",""); OMElement add = factory.createOMElement("dabi","",""); //建立两个普通节点 OMElement stu = factory.createOMElement("student","",""); stu.addChild(factory.createOMText("mac")); OMElement tea = factory.createOMElement("teacher","",""); tea.addChild(factory.createOMText("silly")); //构建树,将两个普通节点连到root节点上 root.addChild(stu); root.addChild(tea); //构建树,将root节点连到doc节点上 dod.addChild(root); // 构建writer做输出器 XMLStreamWriter writer = XMLOutputFactory.newInstance().createXMLStreamWriter( new FileOutputStream("2.xml")); root.serialize(writer); // cache on writer.flush(); FileInputStream xmlFile1 = new FileInputStream("2.xml"); XMLStreamReader parser1 = XMLInputFactory.newInstance().createXMLStreamReader(xmlFile1); StAXOMBuilder builder1 = new StAXOMBuilder(parser1); OMElement doc1 = builder1.getDocumentElement(); Iterator<OMElement> iter1 = doc1.getChildElements(); while(iter1.hasNext()){ OMElement temp = iter1.next(); System.out.println("===================="); System.out.println(temp.getLocalName()+":"+temp.getText()); } System.out.println("!!!!!!!!"); OMFactory omf = OMAbstractFactory.getOMFactory(); // OMDocument od = omf.createOMDocument(); OMElement root1 = omf.createOMElement("root","",""); OMElement name = omf.createOMElement("name","",""); OMElement sex = omf.createOMElement("sexy","",""); sex.addChild(omf.createOMText("man")); name.addChild(omf.createOMText("dabi")); root1.addChild(sex); root1.addChild(name); // od.addChild(root1); XMLStreamWriter xmlw = XMLOutputFactory.newInstance().createXMLStreamWriter(new FileOutputStream("3.xml")); root1.serialize(xmlw); xmlw.flush(); } }

<"1.0" encoding="UTF-8"?> <fool> <student> <name>mac</name> <id>12</id> <age>33</age> <sex>male</sex> <message>hello world</message> </student> <student> <name>silly</name> <id>5</id> <age>12</age> <sex>female</sex> </student> <teacher> <name>Mr. Jones</name> <id>2</id> <age>31</age> <sex>male</sex> </teacher> <student> <name>macy</name> <id>2</id> <age>40</age> <sex>female</sex> </student> <student> <name>tom</name> <id>32</id> <age>31</age> <sex>male</sex> </student> <message>hello world</message> </fool>

再分享一例： 用JAVA读取XML文件

解析XML的步骤如下：

1.创建DocumentBuilder工厂

2.创建DocumentBuilder对象

3.DocumentBuilder对象的parse方法得到Document对象

4.Document对象的getElementsByTagName得到NodeList集合

5.通过getFirstChild和getNextSibling进行遍历

用到的包：

import javax.xml.parsers.*;

import org.w3c.dom.*;

import org.xml.sax.*;

用到的对象：

DocumentBuilderFactory：创建DocumentBuilder的抽象工厂 DocumentBuilder：可以从 XML 获取一个 Document Document：提供供对文档数据的基本访问

用到的方法：

DocumentBuilder.parse(String)'：将给定 URI 的内容解析为一个 XML 文档，并且返回一个新的 DOM Document对象 Document.getElementsByTagName(String)'：返回具有给定标记名称的所有 Element 的 NodeList Element.getAttribute(String)'：通过名称获得属性值

下面来解析一个XML文件

import javax.xml.parsers.*; import org.w3c.dom.*; import org.xml.sax.*; public class Test { public static void main(String[] args) { DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); try { DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse("pet2.xml"); NodeList dogList = doc.getElementsByTagName("dog"); System.out.println("共有" + dogList.getLength() + "个dog节点"); for (int i = 0; i < dogList.getLength(); i++) { Node dog = dogList.item(i); Element elem = (Element) dog; System.out.println("id:" + elem.getAttribute("id")); for (Node node = dog.getFirstChild(); node != null; node = node.getNextSibling()) { if (node.getNodeType() == Node.ELEMENT_NODE) { String name = node.getNodeName(); String value = node.getFirstChild().getNodeValue(); System.out.print(name + ":" + value + "t"); } } System.out.println(); } } catch (Exception e) { e.printStackTrace(); } } }

XML文件

<pets> <dogs> <dog id="1"> <name>YAYA</name> <health>100</health> <love>0</love> <strain>酷酷的雪娜瑞</strain> </dog> <dog id="2"> <name>OUOU</name> <health>90</health> <love>15</love> <strain>聪明的拉布拉多犬</strain> </dog> </dogs> <penguins> <penguin id="3"> <name>QQ</name> <health>100</health> <love>20</love> <sex>Q仔</sex> </penguin> </penguins> </pets>

以上就是本文的全部内容，希望对大家的学习有所帮助。