JAXB案例：Xml与String进行交互

实体类：

package AjaxTest;

import javax.xml.bind.annotation.XmlElement;

public class JAXBEntity {
    private String headId;
    private String headName;
    private String headPwd;

    //在XML中的节点名称
    @XmlElement(name = "JAXB_headId")
    public String getHeadId() {
        return headId;
    }
    public void setHeadId(String headId) {
        this.headId = headId;
    }
    //在XML中的节点名称
    @XmlElement(name = "JAXB_headName")
    public String getHeadName() {
        return headName;
    }
    public void setHeadName(String headName) {
        this.headName = headName;
    }
    //在XML中的节点名称
    @XmlElement(name = "JAXB_headPwd")
    public String getHeadPwd() {
        return headPwd;
    }
    public void setHeadPwd(String headPwd) {
        this.headPwd = headPwd;
    }
}

实体类1：

package AjaxTest;

import javax.xml.bind.annotation.XmlElement;

public class JAXBEntity1 {
    private String listId;
    private String listName;
    private String listAddress;

    //在XML中的节点名称    
    @XmlElement(name="body_Id")  
    public String getListId() {
        return listId;
    }
    public void setListId(String listId) {
        this.listId = listId;
    }
    //在XML中的节点名称
    @XmlElement(name="body_Name")  
    public String getListName() {
        return listName;
    }
    public void setListName(String listName) {
        this.listName = listName;
    }
    //在XML中的节点名称
    @XmlElement(name="body_Address")  
    public String getListAddress() {
        return listAddress;
    }
    public void setListAddress(String listAddress) {
        this.listAddress = listAddress;
    }
}

进行对象存放类：
JAXBEntity节点位置 namespace：XML目标名称空间 defaultValue：此元素的默认值;
nillable:是否可以为空，默认false;
required=true ：将 Javabean 属性映射到一个 minOccurs=”1” 的 XML 模式元素声明

package AjaxTest;

import java.util.List;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlRootElement;

//根节点位置  @XmlRootElement：将类或枚举类型映射到XML元素
@XmlRootElement(name = "JAXBMax")
public class JAXBEntity2 {
    private JAXBEntity entity; //entity对象
    private List<JAXBEntity1> listEnityt; //List<Enityt1> 存放集合对象
    @XmlElement(name = "JAXBEntity",namespace="www.baidu.com",nillable=false,required=false)
    public JAXBEntity getEntity() {
        return entity;
    }
    public void setEntity(JAXBEntity reqHeader) {
        this.entity = reqHeader;
    }

    //在XML中集合的父节点
    @XmlElementWrapper(name = "JAXBList_Entity1")
    @XmlElement(name = "Entity1")//在XML中集合的单个对象节点名
    public List<JAXBEntity1> getListEnityt() {
        return listEnityt;
    }

    public void setListEnityt(List<JAXBEntity1> listEnityt) {
        this.listEnityt = listEnityt;
    }
}

Xml和String字符的交互类：

package AjaxTest;

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

public class JAXBXmlorString {
        /**
         * @param <T>
         * @param xml
         * @param t
         * @return XML转换成对象
         * @throws JAXBException
         */
    public static <T> T xmlToBean(String xml, T t) throws JAXBException {
        JAXBContext context = JAXBContext.newInstance(t.getClass());
        Unmarshaller um = context.createUnmarshaller();
        StringReader sr = new StringReader(xml);
        t = (T) um.unmarshal(sr);
        return t;
    }

    /**
     * @param smsDeliverReq
     * @return 对象转换XML
     * @throws JAXBException
     * @throws FileNotFoundException
     */
    public static <T> StringWriter beanToXml(T t) throws JAXBException, FileNotFoundException {
        JAXBContext context = JAXBContext.newInstance(t.getClass());
        Marshaller m = context.createMarshaller();
        StringWriter sw = new StringWriter();
        m.marshal(t, sw);
        m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        m.marshal(t, new FileOutputStream("src/Test.xml"));//查找XML文件的位置
        return sw;
    }
}

调用测试类，进行测试

package AjaxTest;

import java.io.FileNotFoundException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.JAXBException;

public class AjaxTest {
        /**
         * @param args
         * @throws JAXBException
         * @throws FileNotFoundException
         */
        public static void main(String[] args) throws  FileNotFoundException, JAXBException {
            //调用XML和String交互类
            JAXBXmlorString jxs=new JAXBXmlorString();  

        JAXBEntity ent = new JAXBEntity();//创建对象添加数据
        ent.setHeadId("20161224");
        ent.setHeadName("Demon_MF");
        ent.setHeadPwd("admin");
        JAXBEntity1 et1 = new JAXBEntity1();//创建对象添加数据
        et1.setListId("1");
        et1.setListName("巫妖王");
        et1.setListAddress("寒冰王座");
        JAXBEntity1 et2 = new JAXBEntity1();//创建对象添加数据
        et2.setListId("2");
        et2.setListName("伊利丹");
        et2.setListAddress("黑暗神殿");
        List<JAXBEntity1> listEntity=new ArrayList<JAXBEntity1>();//创建集合添加对象
        listEntity.add(et1);
        listEntity.add(et2);

        JAXBEntity2 entity2= new JAXBEntity2();//调用对象存放类
        entity2.setListEnityt(listEntity); //将上面的集合和对象放入相应的参数位置
        entity2.setEntity(ent);

        //对象转换成XML并放入String字符串中
        StringWriter sw = jxs.beanToXml(entity2);
        System.out.println("转换后的xml"+ sw.toString());

        JAXBEntity2 AE2 =jxs.xmlToBean(sw.toString(), entity2);
        System.out.println("将XML转换成对象后输出集合信息：");
        for (int i = 0; i < AE2.getListEnityt().size(); i++) {
            System.out.println(AE2.getListEnityt().get(i).getListId());
            System.out.println(AE2.getListEnityt().get(i).getListName());
            System.out.println(AE2.getListEnityt().get(i).getListAddress());
        }
        System.out.println("读取节点");
        System.out.println(AE2.getEntity().getHeadId()+" ： "+AE2.getEntity().getHeadName());
    }
}

在Test.xml文件中出现一下内容

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<JAXBMax xmlns:ns2="www.baidu.com">
    <ns2:JAXBEntity>
        <JAXB_headId>20161224</JAXB_headId>
        <JAXB_headName>Demon_MF</JAXB_headName>
        <JAXB_headPwd>admin</JAXB_headPwd>
    </ns2:JAXBEntity>
    <JAXBList_Entity1>
        <Entity1>
            <body_Address>寒冰王座</body_Address>
            <body_Id>1</body_Id>
            <body_Name>巫妖王</body_Name>
        </Entity1>
        <Entity1>
            <body_Address>黑暗神殿</body_Address>
            <body_Id>2</body_Id>
            <body_Name>伊利丹</body_Name>
        </Entity1>
    </JAXBList_Entity1>
</JAXBMax>