jaxb常用的生成xml范例
Student.java
package com.jaxb;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
@XmlAccessorType(XmlAccessType.FIELD)
public class Student {
//作为节点的一个属性
@XmlAttribute
private int id;
@XmlElement(name="stAge")
private int studentAge;
@XmlElement(name="stName")
private String studentName;
public Student(){
}
/**
* 创建一个新的实例Student.
* @param id
* @param studentAge
* @param studentName
*/
public Student(int id, int studentAge, String studentName) {
super();
this.id = id;
this.studentAge = studentAge;
this.studentName = studentName;
}
/**
* 获取studentAge
* @return studentAge studentAge
*/
public int getStudentAge() {
return studentAge;
}
/**
* 设置studentAge
* @param studentAge studentAge
*/
public void setStudentAge(int studentAge) {
this.studentAge = studentAge;
}
/**
* 获取studentName
* @return studentName studentName
*/
public String getStudentName() {
return studentName;
}
/**
* 设置studentName
* @param studentName studentName
*/
public void setStudentName(String studentName) {
this.studentName = studentName;
}
/**
* 获取id
* @return id id
*/
public int getId() {
return id;
}
/**
* 设置id
* @param id id
*/
public void setId(int id) {
this.id = id;
}
}
Teacher.java
package com.jaxb;
import java.util.List;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlRootElement;
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement
public class Teacher{
@XmlElement(name="teAge")
private int teacherAge;
@XmlElement(name="teName")
private String teacherName;
//XmlElementWrapper这个会给xml包装一层
//
//
// ......
//
// ......
//
@XmlElementWrapper(name="students")
@XmlElement(name="student")
private List students;
public Teacher(){}
/**
* 创建一个新的实例Teacher.
* @param teacherAge
* @param teacherName
*/
public Teacher(int teacherAge, String teacherName) {
super();
this.teacherAge = teacherAge;
this.teacherName = teacherName;
}
/**
* 获取teacherAge
* @return teacherAge teacherAge
*/
public int getTeacherAge() {
return teacherAge;
}
/**
* 设置teacherAge
* @param teacherAge teacherAge
*/
public void setTeacherAge(int teacherAge) {
this.teacherAge = teacherAge;
}
/**
* 获取teacherName
* @return teacherName teacherName
*/
public String getTeacherName() {
return teacherName;
}
/**
* 设置teacherName
* @param teacherName teacherName
*/
public void setTeacherName(String teacherName) {
this.teacherName = teacherName;
}
/**
* 获取students
* @return students students
*/
public List getStudents() {
return students;
}
/**
* 设置students
* @param students students
*/
public void setStudents(List students) {
this.students = students;
}
} JaxbTest.java
package com.jaxb;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.OutputStream;
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 JaxbTest {
private final static String XML_CODE = "UTF-8";
public static void main(String[] args) throws JAXBException {
Teacher teacher = new Teacher(33,"teacherA");
List students = new ArrayList();
for (int i = 1; i < 3; i++) {
Student student = new Student(i,i,"sName_"+i);
students.add(student);
}
teacher.setStudents(students);
//存到字符串中并打印出来
System.out.println(objectToXmlStr(teacher));
//写入到文件中
objectToXmlToFile(teacher,"d:\\teacher.xml");
//打印到控制台
objectToXmlToConsle(teacher);
}
public static void objectToXmlToConsle(Object object) throws JAXBException {
if(object == null) return;
System.out.println("打印xml到控制台");
JAXBContext context = JAXBContext.newInstance(object.getClass());
Marshaller jaxbMarshaller = context.createMarshaller();
//是否格式化输出xml文件
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
//设置编码
jaxbMarshaller.setProperty(Marshaller.JAXB_ENCODING,XML_CODE);
//控制台打印输出
jaxbMarshaller.marshal(object,System.out);
}
public static void objectToXmlToFile(Object object,String filePath) throws JAXBException {
if(object == null || filePath == null || "".equals(filePath)) return;
File file = new File(filePath);
JAXBContext context = JAXBContext.newInstance(object.getClass());
Marshaller jaxbMarshaller = context.createMarshaller();
//是否格式化输出xml文件
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
//设置编码
jaxbMarshaller.setProperty(Marshaller.JAXB_ENCODING,XML_CODE);
//写入到文件中
jaxbMarshaller.marshal(object,file);
System.out.println("xml已写入到文件"+filePath);
}
public static String objectToXmlStr(Object object) throws JAXBException {
if (object == null) return "";
System.out.println("把对象转换为xml字符串");
OutputStream out = new ByteArrayOutputStream();
JAXBContext context = JAXBContext.newInstance(object.getClass());
Marshaller jaxbMarshaller = context.createMarshaller();
//是否格式化输出xml文件
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
//设置编码
jaxbMarshaller.setProperty(Marshaller.JAXB_ENCODING,XML_CODE);
//打印到输出流中
jaxbMarshaller.marshal(object,out);
return out.toString();
}
}
打印到控制台的xml内容为
33
teacherA
1
sName_1
2
sName_2