XML DOM4J解析XML文件

DOM4J解析XML文件

一、需要导入的包



二、解析的XML文件（student.xml）

<?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.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

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

public class DOM4jParseMain {
public static void main(String[] args) {
try {
ArrayList<Student> list = new ArrayList<>();
// 步骤一： 创建XML的解析器
SAXReader saxReader = new SAXReader();
// 步骤二：解析XML文件
Document document = saxReader.read(new File("student.xml"));
// 获取根节点
Element rootElement = document.getRootElement();
// 获取根节点下面的所有节点
List<Element> elements = rootElement.elements();
for (int i = 0; i < elements.size(); i++) {
Element element = elements.get(i);
Attribute id = element.attribute("id");
;//获取元素节的属性对象
String idText = id.getValue();//获取属性值

Attribute user = eleme
4000
nt.attribute("user");
String userText = user.getValue();

Element name = element.element("name");//获取element节点下元素名字为name的子节点
String nameText = name.getText();//取出节点的文本内容
// String nameText = e.elementText("name");//等价于 element.element("name").getText()

Element age = element.element("age");
String ageText = age.getText();

Element sex = element.element("sex");
String sexText = sex.getText();

Element height = element.element("height");
String heightText = height.getText();

list.add(new Student(Integer.parseInt(idText), userText, 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 (DocumentException e) {
e.printStackTrace();
} finally {
}

}
}


四、Student.java

package com.hcq.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