Java中Dom解析XML
DOM将整个XML文件加载到内存中，并构建出节点树；应用程序可以通过遍历节点树的方式来解析XML文件中的各个节点、属性等信息；
这种方式便于对XML节点的添加修改等，而且解析也很方便，然后它比较耗费内存，解析速度也不快
sax解析: http://www.cnblogs.com/gavinYang/p/3505543.html
dom4j解析: http://www.cnblogs.com/gavinYang/p/3505535.html
jdom解析: http://www.cnblogs.com/gavinYang/p/3505530.html
Java代码：
1 package com.test; 2 3 import java.io.File; 4 import java.util.ArrayList; 5 import java.util.List; 6 import javax.xml.parsers.DocumentBuilder; 7 import javax.xml.parsers.DocumentBuilderFactory; 8 import org.w3c.dom.Document; 9 import org.w3c.dom.Element; 10 import org.w3c.dom.Node; 11 import org.w3c.dom.NodeList; 12 13 public class DomXML { 14 15 public static void main(String[] args) { 16 try { 17 File file = new File("e:/People.xml"); 18 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 19 DocumentBuilder builder = factory.newDocumentBuilder(); 20 Document document = builder.parse(file); 21 Element element = document.getDocumentElement(); 22 23 List<People> peopleList = new ArrayList<People>(); 24 NodeList peopleNodes = element.getElementsByTagName("People"); 25 for(int i=0;i<peopleNodes.getLength();i++){ 26 People people = new People(); 27 Element peopleElement = (Element) peopleNodes.item(i); 28 people.setId(peopleElement.getAttribute("id")); 29 NodeList childPeopleNodes = peopleElement.getChildNodes(); 30 for(int j=0;j<childPeopleNodes.getLength();j++){ 31 //DOM解析时候注意子节点前面的空格也会被解析 32 if(childPeopleNodes.item(j) instanceof Element){ 33 Element childPeopleElement = (Element) childPeopleNodes.item(j); 34 if(childPeopleElement.getNodeType()==Node.ELEMENT_NODE){ 35 if(childPeopleElement.getNodeName().equals("Name")){ 36 people.setEnglishName(childPeopleElement.getAttribute("en")); 37 people.setName(childPeopleElement.getTextContent()); 38 } 39 else if(childPeopleElement.getNodeName().equals("Age")){ 40 people.setAge(childPeopleElement.getTextContent()); 41 } 42 } 43 } 44 } 45 peopleList.add(people); 46 } 47 48 for(People people : peopleList){ 49 System.out.println(people.getId()+"\t"+people.getName()+"\t"+people.getEnglishName()+"\t"+people.getAge()); 50 } 51 52 } catch (Exception e) { 53 // TODO 自动生成的 catch 块 54 e.printStackTrace(); 55 } 56 57 58 } 59 }
People对象:
1 package com.test; 2 3 public class People { 4 private String id; 5 private String name; 6 private String englishName; 7 private String age; 8 public String getId() { 9 return id; 10 } 11 public void setId(String id) { 12 this.id = id; 13 } 14 public String getName() { 15 return name; 16 } 17 public void setName(String name) { 18 this.name = name; 19 } 20 public String getEnglishName() { 21 return englishName; 22 } 23 public void setEnglishName(String englishName) { 24 this.englishName = englishName; 25 } 26 public String getAge() { 27 return age; 28 } 29 public void setAge(String age) { 30 this.age = age; 31 } 32 33 }
xml：
1 <?xml version="1.0" encoding="UTF-8"?> 2 <PeopleList> 3 <People id="1"> 4 <Name en='zhangsan'>张三</Name> 5 <Age>20</Age> 6 </People> 7 <People id="2"> 8 <Name en='lisi'>李四</Name> 9 <Age>30</Age> 10 </People> 11 </PeopleList>
