使用dom4j解析xml文件问题
作者：C币贫困户
这篇文章主要介绍了使用dom4j解析xml文件问题,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教
使用dom4j解析xml文件
Stu.java
private String name;
private int age;
private String sex;
public Stu(String name, int age, String sex) {
this.name = name;
this.age = age;
this.sex = sex;
}
public Stu() {
}
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 getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
@Override
public String toString() {
return "Stu{" +
"name='" + name + '\'' +
", age=" + age +
", sex='" + sex + '\'' +
'}';
}
}student.xml
<?xml version="1.0" encoding="utf-8"?>
<students>
<student>
<name>张三</name>
<age>18</age>
<sex>男</sex>
</student>
<student>
<name>李四</name>
<age>19</age>
<sex>女</sex>
</student>
</students>getxml.java
import Bean.Stu;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.junit.Test;
import java.util.List;
public class getxml {
@Test
public void get() throws Exception {
//获取SAXReader对象
SAXReader saxReader = new SAXReader();
//读取配置文件
Document read = saxReader.read("./src/main/java/src/student.xml");
//获取根标签
Element rootElement = read.getRootElement();
//根据根标签获取”student“标签列表
List<Element> students = rootElement.elements("student");
//遍历
for (Element student : students){
//获取标签的文本
String name = student.elementText("name");
int age = Integer.parseInt(student.elementText("age"));
String sex = student.elementText("sex");
Stu stu = new Stu(name, age, sex);
System.out.println(stu);
}
}
}结果：
使用DOM4J解析XML文档，输出所有学员信息和添加学生信息
使用DOM4J要导包
xml信息
<?xml version="1.0" encoding="UTF-8"?>
<students>
<student>
<name>苏鸿</name>
<age>20</age>
<school>北方交大</school>
</student>
<student>
<name>李明</name>
<age>21</age>
<school>北大</school>
</student>
</students>学生对象
package web9_29.lx.lx2;
public class Student {
private String name;
private int age;
private String school;
public Student() {
}
public Student(String name, int age, String school) {
this.name = name;
this.age = age;
this.school = school;
}
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 getSchool() {
return school;
}
public void setSchool(String school) {
this.school = school;
}
public String toString() {
return "Student{name = " + name + ", age = " + age + ", school = " + school + "}";
}
}DOM4J解析XML
1.读取XML文件，获得document对象
SAXReader saxReader=new SAXReader();
Document doc=saxReader.read(new File("input.xml"));//input是你xml的文件位置2.//获取文档的根元素Element root=doc.getRootElement();
3.//获取某接节点的单个子节点
Element nameElement=root.element("name");//name是节点名4.//获取节点的文本内容
String text=nameElement.getText()；
package web9_29.lx.lx2;
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.Iterator;
import java.util.List;
public class DOM4JStu {
public static void main(String[] args) {
//创建list集合保存学生对象
List<Student> list=new ArrayList<>();
try {
//读取XML文件，获得document对象
SAXReader saxReader=new SAXReader();
Document doc=saxReader.read(new File("src\\web9_29\\lx\\lx2\\Student.xml"));
//获取文档的根元素
Element root=doc.getRootElement();
//遍历根元素的节点元素
Iterator<?> it=root.elementIterator();
while (it.hasNext()){
//创建学生对象
Student student = new Student();
Element stuElement = (Element) it.next();
//获取节点
Element nameElement=stuElement.element("name");
Element ageElement=stuElement.element("age");
Element schoolElement=stuElement.element("school");
//获取节点的文本类容给学生对象
student.setName(nameElement.getText());
student.setAge(Integer.parseInt(ageElement.getText()));
student.setSchool(schoolElement.getText());
//将学生对象添加到list集合中
list.add(student);
}
} catch (DocumentException e) {
e.printStackTrace();
}
//遍历集合
for (Student s : list) {
System.out.println(s);
}
}
}
运行图片
添加学员信息
package web9_29.lx.lx2;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class DOM4JStuAdd {
public static void main(String[] args) {
//创建集合存储学生对象
List<Student> list=new ArrayList<>();
//要添加的学生信息
list.add(new Student("赵六",20,"安徽大学"));
list.add(new Student("刘启",21,"安徽大学江淮学员"));
try {
//读取XML文件，获得document对象
SAXReader saxReader = new SAXReader();
Document document=saxReader.read(new File("src\\web9_29\\lx\\lx2\\Student.xml"));
//获取文档的根元素
Element root=document.getRootElement();
for (Student s : list) {
//添加student节点
Element newStudentElement=root.addElement("student");
//在student节点下添加节点name,age,school。并通过学生对象赋值
Element nameElement=newStudentElement.addElement("name");
nameElement.setText(s.getName());
Element ageElement=newStudentElement.addElement("age");
ageElement.setText(String.valueOf(s.getAge()));
Element schoolElement=newStudentElement.addElement("school");
schoolElement.setText(s.getSchool());
}
OutputFormat of=OutputFormat.createPrettyPrint();
//指定编码格式
of.setEncoding("UTF-8");
XMLWriter writer=new XMLWriter(new FileWriter("src\\web9_29\\lx\\lx2\\Student.xml"),of);
writer.write(document);
writer.close();
} catch (DocumentException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}运行后图片
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。