XML jDOM解析XML文件

 jDOM解析XML文件

注：借助Student对象存储解析到的每个学生信息

一、需要导入的包

二、student.xml(解析的文件)

<?xml version="1.0" encoding="utf-8" ?><!--xml文档声明--><!--DTD约束--><!DOCTYPE class [        <!ELEMENT student (name,age,sex,height)>        <!ELEMENT name (#PCDATA)>        <!ELEMENT age (#PCDATA)>        <!ELEMENT sex (#PCDATA)>        <!ELEMENT height (#PCDATA)>        ]><!--只能有一个根标签--><class>    <!--设置属性-->    <student id="1" user="lisi">        <name>李四</name>        <age>18</age>        <sex>男</sex>        <height>182</height>    </student>    <student id="2" user="wangwu">        <name>王五</name>        <age>19</age>        <sex>男</sex>        <height>172</height>    </student></class>

三、解析代码

package com.xml.main;import org.jdom2.Attribute;import org.jdom2.Document;import org.jdom2.Element;import org.jdom2.JDOMException;import org.jdom2.input.SAXBuilder;import java.io.File;import java.io.IOException;import java.util.ArrayList;import java.util.List;public class JDOMParse {    public static void main(String[] args) {        try {            ArrayList<Student> list = new ArrayList<>();            //步骤一：创建jDOM解析构造器            SAXBuilder saxBuilder = new SAXBuilder();            //  步骤二：  解析整个文档            Document document = saxBuilder.build(new File("student.xml"));            //获取文档的根节点            Element rootElement = document.getRootElement();            // 获取元素节点的所有子元素节点            List<Element> children = rootElement.getChildren();            for (int i = 0; i < children.size(); i++) {                Element element = children.get(i);                Attribute id = element.getAttribute("id");//根据属性名获取属性节点                String idValue = id.getValue();//根据属性的值                Attribute user = element.getAttribute("user");                String userValue = user.getValue();                Element name = element.getChild("name");//获取元素下的指定元素名的子节点                String nameText = name.getText();                Element sex = element.getChild("sex");                String sexText = sex.getText();                Element height = element.getChild("height");                String heightText = height.getText();                Element age = element.getChild("age");                String ageText = age.getText();                list.add(new Student(Integer.parseInt(idValue), userValue, nameText, sexText, Integer.parseInt(ageText), Double.parseDouble(heightText)));            }            for (int i = 0; i < list.size(); i++) {                Student student = list.get(i);                System.out.println(student.toString());            }        } catch (JDOMException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } finally {        }    }}

四、Student.java

package com.xml.main;public class Student {    private int id;    private String user;    private String name;    private String sex;    private int age;    private double height;    public Student() {    }    public Student(int id, String user, String name, String sex, int age, double height) {        this.id = id;        this.user = user;        this.name = name;        this.sex = sex;        this.age = age;        this.height = height;    }    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getUser() {        return user;    }    public void setUser(String user) {        this.user = user;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getSex() {        return sex;    }    public void setSex(String sex) {        this.sex = sex;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    public double getHeight() {        return height;    }    public void setHeight(double height) {        this.height = height;    }    @Override    public String toString() {        return "Student{" +                "id=" + id +                ", user='" + user + '\'' +                ", name='" + name + '\'' +                ", sex='" + sex + '\'' +                ", age=" + age +                ", height=" + height +                '}';    }}

五、解析结果