java解析xml的四种方式的代码详情-代码-最代码

首页>代码>java解析xml的四种方式>/xml/src/demo/MyXMLDOM.java
01package demo;
02 
03 
04import java.io.File;
05import java.io.InputStream;
06import java.util.Properties;
07 
08 
09import javax.xml.parsers.DocumentBuilder;
10import javax.xml.parsers.DocumentBuilderFactory;
11import javax.xml.parsers.ParserConfigurationException;
12 
13import org.w3c.dom.Document;
14import org.w3c.dom.Element;
15import org.w3c.dom.Node;
16import org.w3c.dom.NodeList;
17//DOM解析
18public class MyXMLDOM {
19    public static void main(String[] args) {
20        long lasting=System.currentTimeMillis();
21        try {
22            File f=new File("src/a.xml");
23//          if(f.exists()){
24//              System.out.println("存在");
25//          }else{
26//              System.out.println("不存在");
27//              return;
28//          }
29            //获得一个DOM工厂
30            DocumentBuilderFactory  factory=DocumentBuilderFactory.newInstance();
31            //获得一个dom解析器
32            DocumentBuilder builder=factory.newDocumentBuilder();
33            //读配置文件
34            Document doc=builder.parse(f);
35            //开始打印
36            //getDocumentElement 获取根节点
37            System.out.println("<"+doc.getDocumentElement().getNodeName()+">");
38            //判断该根节点下是否有子节点
39            if(doc.getDocumentElement().hasChildNodes()){
40                //利用for循环，把第一个儿子开始，一次判断下个同兄弟节点是否存在
41                for(Node n=doc.getDocumentElement().getFirstChild();n!=null;n=n.getNextSibling()){
42                    //节点有很多，ELEMENT_NODE是元素节点，数字值是1
43                    if(n.getNodeType()==Node.ELEMENT_NODE){
44                        System.out.println("    <"+n.getNodeName()+">");
45                            if(n.hasChildNodes()){
46                                for(Node n1=n.getFirstChild();n1!=null;n1=n1.getNextSibling()){
47                                    if(n1.getNodeType()==Node.ELEMENT_NODE){
48                                            System.out.print("        <"+n1.getNodeName()+">");
49                                                //<name>xb</name> 注:xb算name的下一个节点 即文本节点Text_NODE
50                                                System.out.print(n1.getFirstChild().getNodeValue());
51                                                 
52                                            System.out.println("        </"+n1.getNodeName()+">");
53                                    }
54                                }
55                            }
56                        System.out.println("   </"+n.getNodeName()+">");
57                    }
58                }
59            }
60            System.out.println("</"+doc.getDocumentElement().getNodeName()+">");
61            System.out.println("运行时间"+(System.currentTimeMillis()-lasting)+"毫秒");
62        } catch (Exception e) {
63            e.printStackTrace();
64        }
65 
66    }
67}