DOM解析XML

下面是DOM解析XML的示例，包括三个文件employee.xml、Employee.java、DomEmployee.java

1.被解析的employee.xml文件

	
	 
	 
	
	
	
	
	
]>

	
		tom
		20
		male
		[email protected]
		10k
	
	
		jack
		30
		female
		[email protected]
		8k
	
	
		rose
		25
		female
		[email protected]
		5k
	
	
		mark
		30
		male
		[email protected]
		5k
	

2.Employee.java文件

package exercise;

public class Employee {

	private int id;
	private String depName;
	private String name;
	private int age;
	private String gender;
	private String email;
	private String salary;
	
	public Employee() {
	}
	
	public Employee(int id, String depName, String name, int age, String gender, String email, String salary) {
		super();
		this.id = id;
		this.depName = depName;
		this.name = name;
		this.age = age;
		this.gender = gender;
		this.email = email;
		this.salary = salary;
	}
	
	@Override
	public String toString() {
		return "Employee [id=" + id + ", depName=" + depName + ", name=" + name + ", age=" + age + ", gender=" + gender
				+ ", email=" + email + ", salary=" + salary + "]";
	}
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getDepName() {
		return depName;
	}
	public void setDepName(String depName) {
		this.depName = depName;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getGender() {
		return gender;
	}
	public void setGender(String gender) {
		this.gender = gender;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public String getSalary() {
		return salary;
	}
	public void setSalary(String salary) {
		this.salary = salary;
	}
	
	
}

 3.DomEmployee.java实现解析

package exercise;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * 我们利用Dom解析读取employee.xml文件中的员工信息，将其存放到容器中
 * 同时我们加入封装的思想
 * @author www11
 *
 */
public class DomEmployee {

	private  List list;  //创建一个容器用于保存Employee对象
	private  Employee employee;    //接受每一个employee
	public DomEmployee() {        //构造器
		list = new ArrayList();
	}	
	public List getList() { //提供getList()方法，从外部获取
		return list;
	}
	//获取文档树类型对象的函数，大家不要被try..catch语句给迷惑，代码很简单
	private Document getDocument(File file) {
		//1.创建Dom解析工厂
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		Document document = null;
		//2.用工厂生成一个Dom构建器
		try {
			DocumentBuilder builder = factory.newDocumentBuilder();
			try {
				//3.用Dom构建器去调用其中的解析方法,方法返回一个文档树类型的对象，我们只要对这个文档树对象操作就可以得到想要的结果了
				document = builder.parse(file);
			}catch (Exception e) {
				e.printStackTrace();
			}	
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		}
		return document;
	}
	
	//将获取到的文档解析出来的结果添加到list中
	private void parser(Document document) {
		//直接通过标签名获得节点集合
		NodeList nodeList = document.getElementsByTagName("employee");
		
		for(int i = 0; i < nodeList.getLength();i++) {
			//将每一个节点转换为元素类型
			Element e = (Element)nodeList.item(i);
			employee = new Employee();
			String id = e.getAttribute("id");       //通过属性名直接获取属性值
			String depName = e.getAttribute("depName");
			employee.setId(Integer.parseInt(id));   //将获取到的值赋给employee
			employee.setDepName(depName);
			
			NodeList nodeList2 = e.getChildNodes();  //获取到子节点集合，其中包括name，age，gender，email，salary
			for(int j = 0;j list = dom.getList();
		for(Employee e : list) {
			System.out.println(e);
		}
		
	}
}