import java.util.List;

import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)

@XmlRootElement(name = "root")

public class Girl {

    @XmlAttribute(name = "type")

    private String type;

    @XmlElement(name = "name")

    private String name;

    @XmlElement(name = "age")

    private String age;

    @XmlElement(name = "girl")

    private List<Girl> girlList;

    public String toString() {

        StringBuilder sb = new StringBuilder();

        for (Girl girl : girlList) {

            sb.append(girl.toString());

        }

        return sb.toString();

    }

    public Girl(){

        super();

    }  

    public Girl(String name,String age){

        this.name=name;

        this.age=age;

    } 

    public String getType() {

        return type;

    }

    public void setType(String type) {

        this.type = type;

    }

    public String getAge() {

        return age;

    }

    public void setAge(String age) {

        this.age = age;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public List<Girl> getGirlList() {

        return girlList;

    }

    public void setGirlList(List<Girl> girlList) {

        this.girlList = girlList;

    }

}

import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.util.ArrayList;

import java.util.List;

import javax.xml.bind.JAXBContext;

import javax.xml.bind.Marshaller;

import javax.xml.bind.Unmarshaller;

public class TestUnm {

    public static void main(String[] args) {

        marshaller();

    }

    public static void marshaller() {

        try {

            JAXBContext jaxbC = JAXBContext.newInstance(Girl.class);

            Marshaller ms = jaxbC.createMarshaller();

            ms.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);

            Girl girl=new Girl();

            List<Girl> girls=new ArrayList<Girl>();

            Girl g1=new Girl("小红", "20");

            Girl g2=new Girl("小芳", "16");

            Girl g3=new Girl("小丽", "17");

            girls.add(g1);

            girls.add(g2);

            girls.add(g3);

            girl.setGirlList(girls);

            StringWriter sw=new StringWriter();

            ms.marshal(girl, sw);

            System.out.println(sw.toString());

            createFile("E:\\app\\","test.xml",sw.toString());

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    public static boolean createFile(String path,String fileName,String fileContent){

        boolean bool=false;

        File file=new File(path+File.separator+fileName);

        try {

            if(!file.exists()){

                file.createNewFile();

                bool=true;

            }

            writeFileContent(path+File.separator+fileName,fileContent);

        } catch (Exception e) {

            e.printStackTrace();

        }

        return bool;

    }

    public static boolean writeFileContent(String path,String fileContent){

        boolean bool=false;

        FileOutputStream fos=null;

        PrintWriter pw=null;

        try {

            File file=new File(path);

            fos=new FileOutputStream(file);

            OutputStreamWriter  writer=new OutputStreamWriter(fos, "UTF-8");

            pw=new PrintWriter(writer);

            pw.write(fileContent);

            pw.flush();

            bool=true;

        } catch (Exception e) {

           e.printStackTrace();

        }

        return bool;

    }

}