XML DOM4J解析XML文件

我会带着你远行 2022-06-08 10:10 319阅读 0赞

**DOM4J解析XML文件**

**一、需要导入的包**

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**二、解析的XML文件（student.xml）**

<?xml version="1.0" encoding="utf-8" ?>
    
    <!DOCTYPE class [
            <!ELEMENT student (name,age,sex,height)>
            <!ELEMENT name (#PCDATA)>
            <!ELEMENT age (#PCDATA)>
            <!ELEMENT sex (#PCDATA)>
            <!ELEMENT height (#PCDATA)>
            ]>
    
    
    <class>
        
        <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 = element.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**

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[Center]: /images/20220608/a2f70f7db9624d13bbad8fd57c7b81ba.png
[Center 1]: /images/20220608/59d4035c3f3c4fe8866043b4295ece9c.png