Xml解析

Posted 2020-11-21 wings-ff

SAXReader 解析器

 1 import java.util.Iterator;
 2 
 3 import org.dom4j.Document;
 4 import org.dom4j.Element;
 5 import org.dom4j.io.SAXReader;
 6 
 7 public class Dom4jTest {
 8 
 9     /**
10      * @param args
11      */
12     public static void main(String[] args) {
13         try {
14             //创建解析器
15             SAXReader reader = new SAXReader();
16             //通过解析器的read方法将配置文件读取到内存中，生成一个Document[org.dom4j]对象树
17             Document document = reader.read("conf/students.xml");
18             //获取根节点
19             Element root = document.getRootElement();
20             //开始遍历根节点
21             for(Iterator<Element> rootIter = root.elementIterator();rootIter.hasNext();){
22                 Element studentElt = rootIter.next();
23                 for(Iterator<Element> innerIter = studentElt.elementIterator();innerIter.hasNext();){
24                     Element innerElt = innerIter.next();
25                     String innerValue = innerElt.getStringValue();
26                     System.out.println(innerValue);
27                 }
28                 System.out.println("-------------------------------");
29             }
30         } catch (Exception e) {
31             e.printStackTrace();
32         }
33     }
34 
35 }

 //sax解析

 1 import javax.xml.parsers.ParserConfigurationException;
 2 import javax.xml.parsers.SAXParser;
 3 import javax.xml.parsers.SAXParserFactory;
 4 
 5 import org.xml.sax.Attributes;
 6 import org.xml.sax.SAXException;
 7 import org.xml.sax.helpers.DefaultHandler;
 8 
 9 public class MySAXParser {
10 
11     /**
12      * @param args
13      */
14     public static void main(String[] args) {
15         try {
16             //创建解析器工厂
17             SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
18             //创建解析器
19             SAXParser saxParser = saxParserFactory.newSAXParser();
20             //通过解析器的parser方法
21             saxParser.parse("conf/persons.xml", new MyDefaultHandler());
22         } catch (Exception e) {
23             // TODO Auto-generated catch block
24             e.printStackTrace();
25         }
26     }
27 
28 }
29 
30 class MyDefaultHandler extends DefaultHandler{
31 
32     @Override
33     public void startElement(String uri, String localName, String qName,
34             Attributes attributes) throws SAXException {
35         System.out.print("<" + qName + ">");
36     }
37     @Override
38     public void characters(char[] ch, int start, int length)
39             throws SAXException {
40         System.out.print(new String(ch,start,length));
41     }
42 
43     @Override
44     public void endElement(String uri, String localName, String qName)
45             throws SAXException {
46         System.out.print("</" + qName + ">");
47     }
48 
49 
50     
51 }