用的是jdk自带的javax.xml.bind.JAXBContext将对象和xml字符串进行相互转换。

比较常用的几个：

@XmlRootElement：根节点

@XmlAttribute：该属性作为xml的attribute

@XmlElement：该属性作为xml的element，且可以增加属性(name="NewElementName")，那么生成的xml串的elment的标签是NewElementName

首先，java注解读取XML。

一、新建school.xml文件，内容如下：

延边大学

吉林延吉市

001

小杜

23

002

小张

21

二、根据配置文件书写对应的注解类。

编写Student基类，内容如下：

package com.cvicse.ump.xml.school;

import javax.xml.bind.annotation.XmlAttribute;

import javax.xml.bind.annotation.XmlElement;

public class Student {

private String studentNum;

private String studentName;

private String studentGrade;

private int age;

@XmlElement(name="num")

public String getStudentNum() {

return studentNum;

}

public void setStudentNum(String studentNum) {

this.studentNum = studentNum;

}

@XmlElement(name="name")

public String getStudentName() {

return studentName;

}

public void setStudentName(String studentName) {

this.studentName = studentName;

}

@XmlAttribute(name="grade")

public String getStudentGrade() {

return studentGrade;

}

public void setStudentGrade(String studentGrade) {

this.studentGrade = studentGrade;

}

@XmlElement

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

@Override

public String toString() {

return "Student [studentNum=" + studentNum + ", studentName="

+ studentName + ", studentGrade=" + studentGrade + ", age="

+ age + "]";

}

}

编写基类school，内容如下：

packagecom.cvicse.ump.xml.school;importjava.util.List;importjavax.xml.bind.annotation.XmlElement;importjavax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name="SCHOOL")public classSchool {privateString name;privateString address;private Liststudents;

@XmlElementpublicString getName() {returnname;

}public voidsetName(String name) {this.name =name;

}

@XmlElementpublicString getAddress() {returnaddress;

}public voidsetAddress(String address) {this.address =address;

}

@XmlElement(name="student")public ListgetStudents() {returnstudents;

}public void setStudents(Liststudents) {this.students =students;

}

@OverridepublicString toString() {return "School [name=" + name + ", address=" + address + "]";

}

}

编写XML读取程序：

package com.cvicse.ump.xml.school;

import java.io.File;

import java.util.List;

import javax.xml.bind.JAXBContext;

import javax.xml.bind.JAXBException;

import javax.xml.bind.Unmarshaller;

public class SchoolRead {

public static void main(String[] args) {

File file = new File("src/school.xml");

try {

JAXBContext context = JAXBContext.newInstance(School.class);

Unmarshaller unMar = context.createUnmarshaller();

School school = (School) unMar.unmarshal(file);

System.out.println(school);

Liststudents = school.getStudents();

for(Student student:students){

System.out.println(student);

}

} catch (JAXBException e) {

e.printStackTrace();

}

}

}

编写写入文件程，内容如下：

package com.cvicse.ump.xml.school;

import java.util.ArrayList;

import java.util.List;

import javax.xml.bind.JAXBContext;

import javax.xml.bind.JAXBException;

import javax.xml.bind.Marshaller;

public class SchoolWrite {

public static void main(String[] args) {

School school = new School();

school.setName("实验小学");

school.setAddress("山东济南市");

List students = new ArrayList();

Student student1 = new Student();

student1.setStudentNum("001");

student1.setStudentName("xiaoDy");

student1.setAge(25);

student1.setStudentGrade("1");

Student student2 = new Student();

student2.setStudentNum("002");

student2.setStudentName("xiaoWf");

student2.setAge(22);

student2.setStudentGrade("2");

students.add(student1);

students.add(student2);

school.setStudents(students);

try {

JAXBContext context = JAXBContext.newInstance(School.class);

Marshaller mar = context.createMarshaller();

mar.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

mar.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");

mar.marshal(school, System.out);

} catch (JAXBException e) {

e.printStackTrace();

}

}

}

源码下载：https://yunpan.cn/cxDZgKQbeDLqt (提取码：68e1)

参考网址：http://blog.csdn.net/lhzjj/article/details/11796713