XML 使用JAXB创建xml java解析xml
下面我们通过两个bean类创建和解析xml文件
package com.sg.xml;
public class ClassRoom {
?private int id ;
?private String name;
?private int grade;
?
?public ClassRoom(int id, String name, int grade) {
??super();
??this.id = id;
??this.name = name;
??this.grade = grade;
?}
?
?public ClassRoom() {
??super();
?}
?public int getId() {
??return id;
?}
?public void setId(int id) {
??this.id = id;
?}
?public String getName() {
??return name;
?}
?public void setName(String name) {
??this.name = name;
?}
?public int getGrade() {
??return grade;
?}
?public void setGrade(int grade) {
??this.grade = grade;
?}
}
?
Student.java
?
package com.sg.xml;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Student {
?int id ;
?String name;
?int age ;
?ClassRoom classRoom;
?
?
?
?public Student() {
??super();
?}
?public Student(int id, String name, int age, ClassRoom classRoom) {
??super();
??this.id = id;
??this.name = name;
??this.age = age;
??this.classRoom = classRoom;
?}
?public int getId() {
??return id;
?}
?public void setId(int id) {
??this.id = id;
?}
?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 ClassRoom getClassRoom() {
??return classRoom;
?}
?public void setClassRoom(ClassRoom classRoom) {
??this.classRoom = classRoom;
?}
}
?
下面是测试类：
?
package com.sg.xml;
import java.io.File;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import org.junit.Test;
public class TestJaxb {
?
?//创建xml
?@Test
?public void test01(){
??try {
???JAXBContext context = JAXBContext.newInstance(Student.class);
???Marshaller marshaller = context.createMarshaller();
???Student student = new Student(1, "孙刚", 20, new ClassRoom(1, "软件技术1002班", 2012));
???marshaller.marshal(student, new File("f:"+File.separator+"xml01.xml"));
??} catch (JAXBException e) {
???e.printStackTrace();
??}
?}
?//解析xml
?@Test
?public void test02(){
??File file = new File("f:"+File.separator+"xml01.xml");
??
??try {
???JAXBContext context = JAXBContext.newInstance(Student.class);
???Unmarshaller unmarshaller = context.createUnmarshaller();
???
???Student student = (Student)unmarshaller.unmarshal(file);
???
???System.out.println(student.getName()+","+student.getClassRoom().getName());
??} catch (JAXBException e) {
???e.printStackTrace();
??}
??
?}
}
?
?
创建结果如下：
?
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<student>
?<age>20</age>
??<classRoom>
???<grade>2012</grade>
???<id>1</id>
???<name>软件技术1002班</name>
??</classRoom>
?<id>1</id>
?<name>孙刚</name>
</student>
