Java处理XML的DOM方式

Dear 丶 2022-06-18 12:22 180阅读 0赞

person.xml

<?xml version="1.0" encoding="UTF-8" ?>  
<persons>  
 <person id="20">  
  <name>rock</name>  
  <age>18</age>  
  <address>beijing</address>  
 </person>  
 <person id="21">  
  <name>iori</name>  
  <age>20</age>  
  <address>riben daban</address>  
 </person>  
 <person id="22">  
  <name>mai</name>  
  <age>21</age>  
  <address>riben dongjing</address>  
 </person>  
</persons>

Person.java

package cn.rock.bean;

public class Person \{  
 private int id;  
 private String name;  
 private short age;  
 private String address;  
   
 public int getId() \{  
  return id;  
 \}  
 public void setId(int id) \{  
  this.id = id;  
 \}  
 public String getName() \{  
  return name;  
 \}  
 public void setName(String name) \{  
  this.name = name;  
 \}  
 public short getAge() \{  
  return age;  
 \}  
 public void setAge(short age) \{  
  this.age = age;  
 \}  
 public String getAddress() \{  
  return address;  
 \}  
 public void setAddress(String address) \{  
  this.address = address;  
 \}  
 @Override  
 public String toString() \{  
  return "\[id:" + id + " name:" + name + " age:" + age + " address:" + address + "\]";  
 \}  
   
\}

package cn.rock.service;

import java.io.FileInputStream;  
import java.io.InputStream;  
import java.util.ArrayList;  
import java.util.Iterator;  
import java.util.List;

import javax.xml.parsers.DocumentBuilder;  
import javax.xml.parsers.DocumentBuilderFactory;  
import org.w3c.dom.Document;  
import org.w3c.dom.Element;  
import org.w3c.dom.Node;  
import org.w3c.dom.NodeList;  
import org.w3c.dom.Text;

import cn.rock.bean.Person;

public class DOMParseService \{  
 private List<Person> personList = null;

/\*\*  
  \* @param args  
  \*/  
 public void DOMParseXML() \{  
  personList = new ArrayList<Person>();  
  DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();  
  try\{  
   DocumentBuilder builder = factory.newDocumentBuilder();  
   InputStream inputStream = new FileInputStream("E:\\\\Workspaces\\\\MyEclipse for Spring 8.6\\\\xml\\\\bin\\\\person.xml");  
   Document document = builder.parse(inputStream);  
   Element root = document.getDocumentElement();  
     
   System.out.println(root.getTagName());  
     
   NodeList persons = root.getElementsByTagName("person");  
     
   System.out.println(persons.getLength());  
     
   for(int i=0; i<persons.getLength(); i++)\{  
    Node Node = persons.item(i);  
    if(Node instanceof Element)\{  
     Element personElement = (Element)Node;  
     Person person = new Person();  
     person.setId(new Integer(personElement.getAttribute("id")));  
       
     NodeList childNode = personElement.getChildNodes();  
       
     System.out.println(childNode.getLength());  
       
     for(int y=0; y<childNode.getLength(); y++)\{  
        
      Node personChild = childNode.item(y);  
        
      if(personChild instanceof Element)\{  
         
       Element element = (Element)personChild;  
       System.out.println(element.getTagName());  
         
       Text textNode = (Text)element.getFirstChild();  
       String text = textNode.getNodeValue().trim();  
         
       if("name".equals(element.getTagName()))\{  
        person.setName(text);  
       \}  
       else if("age".equals(element.getTagName()))\{  
        person.setAge(new Short(text));  
       \}  
       else if("address".equals(element.getTagName()))\{  
        person.setAddress(text);  
       \}  
         
      \}  
     \}  
     personList.add(person);  
    \}  
      
   \}  
     
   Iterator iter = personList.iterator();  
   while(iter.hasNext())\{  
    Person per = (Person)iter.next();  
    System.out.println(per.toString());  
   \}  
  \}catch(Exception e)\{  
   e.printStackTrace();  
  \}  
 \}