java解析String类型t复杂xml，多级节点，最好的例子-白红宇

java解析String类型t复杂xml，多级节点，最好的例子

阅读量：5831 次

发布时间：2019-06-18

本文共 3643 字，大约阅读时间需要 12 分钟。

需要用jar包 dom4j-1.6.1.jar

字符串xml如下：

解析代码：

import java.io.ByteArrayInputStream;import java.io.UnsupportedEncodingException;import java.util.Iterator;import org.dom4j.DocumentException;import org.dom4j.io.SAXReader;public class XMLParser {       public static void main(String[] args) {            String xml = "
     
      
       
        aa
       
       
        22
       
       
        
         1
        
        0
        
         
          10.1.1.2
         
         
          9999
         
        
        
         
          10.1.1.5
         
         
          717
         
        
       
       
        
         2
        
        33
        
         
          10.1.1.2
         
         
          9999
         
        
        
         
          10.1.1.9
         
         
          878
         
        
       
      
     ";                 long start = System.currentTimeMillis();                 SAXReader reader = new SAXReader();            try {                org.dom4j.Document doc = reader.read(new ByteArrayInputStream(xml                        .getBytes("UTF-8")));                org.dom4j.Element root = doc.getRootElement();                org.dom4j.Element element;                org.dom4j.Element element2;                org.dom4j.Element element3;                for (Iterator i = root.elementIterator("flw"); i.hasNext();) {                    element = (org.dom4j.Element) i.next();                    System.out                            .println("name:[" + element.elementText("name") + "]");                    System.out.println("age:[" + element.elementText("age") + "]");                    for (Iterator j = element.elementIterator("instance_info"); j                            .hasNext();) {                        element2 = (org.dom4j.Element) j.next();                        System.out.println("\tnum:[" + element2.elementText("num")                                + "]");                        System.out.println("\tcode:["                                + element2.elementText("code") + "]");                        for (Iterator k = element2.elementIterator("instance"); k                                .hasNext();) {                            element3 = (org.dom4j.Element) k.next();                            System.out.println("\t\tip:["                                    + element3.elementText("ip") + "]");                            System.out.println("\t\tmask:["                                    + element3.elementText("mask") + "]");                        }                    }                }            } catch (DocumentException e) {                e.printStackTrace();            } catch (UnsupportedEncodingException e) {                e.printStackTrace();            }            long end = System.currentTimeMillis();            System.out.println("耗时：" + (end - start) + "ms");        }}