【WebService】使用jaxb完成对象和xml的转换

 package com.slp.jxmarshaller;

 /**
  * Created by sanglp on 2017/2/26.
  */
 public class ClassName {
     private int id;
     private String name;
     private int grade;

     public ClassName() {
     }

     public ClassName(int id, String name, int grade) {
         this.id = id;
         this.name = name;
         this.grade = grade;
     }

     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;
     }
 }

package com.slp.jxmarshaller;

import javax.xml.bind.annotation.XmlRootElement;

/**
 * Created by sanglp on 2017/2/26.
 * [com.sun.istack.internal.SAXException2: 由于类型 "com.slp.jxmarshaller.Student" 缺少 @XmlRootElement 注释, 无法将该类型编集为元素]
 */
@XmlRootElement
public class Student {
    private int id;
    private String name;
    private int age;
    private ClassName className;

    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 ClassName getClassName() {
        return className;
    }

    public void setClassName(ClassName className) {
        this.className = className;
    }

    public Student(int id, String name, int age, ClassName className) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.className = className;
    }

    public Student() {
    }
}

 package com.slp.jxmarshaller;

 import org.junit.Test;

 import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
 import javax.xml.bind.Marshaller;
 import javax.xml.bind.Unmarshaller;
 import java.io.StringReader;

 /**
  * Created by sanglp on 2017/2/26.
  */
 public class TestJaxb {

     /**
      * 输出结果
      * <?xml version="1.0" encoding="UTF-8" standalone="yes"?><student><age>21</age><className><grade>2010</grade><id>1</id><name>10数学</name></className><id>1</id><name>张三</name></student>
      */
     @Test
     public void test01(){
         try {
             JAXBContext ctx = JAXBContext.newInstance(Student.class);
             Marshaller marshaller = ctx.createMarshaller();
             Student student = new Student(1,"张三",21,new ClassName(1,"10数学",2010));
             marshaller.marshal(student,System.out);
         } catch (JAXBException e) {
             e.printStackTrace();
         }
     }

     /**
      * 张三 10数学
      */
     @Test
     public void test02(){
         String str="<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><student><age>21</age><className><grade>2010</grade><id>1</id><name>10数学</name></className><id>1</id><name>张三</name></student>\n";
         try {
             JAXBContext ctx = JAXBContext.newInstance(Student.class);
             Unmarshaller unmarshaller = ctx.createUnmarshaller();
             Student stu = (Student) unmarshaller.unmarshal(new StringReader(str));
             System.out.println(stu.getName()+" "+stu.getClassName().getName());
         } catch (JAXBException e) {
             e.printStackTrace();
         }

     }
 }