1、XStream，XStream是codehaus上的一个开源项目，用于将Javabean serialize为xml格式，以及从xml中生成javabean。

2、castor、xmlbeans，castor和xmlbeans这种都是先定义schema，然后根据schema来generate java class，然后调用marshall和unmarshall方法来序列化javabean。这是属于重量级的方法，虽然功能强大，使用却不方便。如果你改了schema，势必要重新generate，这样你就不能在generate的java class上加上自己的方法。导致生成的java class纯粹用于serialize。

3、 commons的betwikt也具有类似的功能，但好像需要配置rule，显得还是稍微麻烦些。

xMap具体实现：

package test;

import java.util.ArrayList;

import java.util.List;

import org.nuxeo.common.xmap.annotation.XNode;

import org.nuxeo.common.xmap.annotation.XNodeList;

import org.nuxeo.common.xmap.annotation.XObject;

/**

* Book 实体对象，此处用XMap注解

* @author Administrator

*

*/

@XObject

public class Book {

@XNode("title")

private String   title;

@XNode("@no")

private String no;

@XNodeList(value = "subject", type = ArrayList.class, componentType = String.class)

private List subjects;

@XNode("price")

private int   price;

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public List getSubjects() {

return subjects;

}

public void setSubjects(List subjects) {

this.subjects = subjects;

}

public int getPrice() {

return price;

}

public void setPrice(int price) {

this.price = price;

}

public String getNo() {

return no;

}

public void setNo(String no) {

this.no = no;

}

}

/**==================================================**/

package test;

import java.util.ArrayList;

import java.util.List;

import org.nuxeo.common.xmap.annotation.XNodeList;

import org.nuxeo.common.xmap.annotation.XObject;

/**

* 图书对象集合类

* @author zhouyu

*

*/

@XObject(value = "books")

public class Books {

@XNodeList(value = "book", type = ArrayList.class, componentType = Book.class)

private List book;

public List getBook() {

return book;

}

public void setBook(List book) {

this.book = book;

}

public void addBook(Book b){

if(book==null){

book=new ArrayList();

}

book.add(b);

}

}

/**==================================================**/

package test;

import java.util.ArrayList;

import java.util.List;

import org.nuxeo.common.xmap.XMap;

import com.io.IoUtils;

/**

* 从对象到xml转换

* @author zhouyu

*

*/

public class ObjectToXmlDemo {

public static void main(String[] args) {

try {

//声明一组书的根节点

Books books=new Books();

//声明一本书

Book book=new Book();

//书的类型

List sj = new ArrayList();

sj.add("java");

sj.add("xml");

//设置书节点的属性

book.setPrice(10);

book.setTitle("java是傻逼");

book.setSubjects(sj);

book.setNo("1");

//将书节点添加到跟节点

books.addBook(book);

//声明一本书

Book book2=new Book();

//书的类型

List sj2=new ArrayList();

sj2.add("C++");

sj2.add("c");

//设置书节点的属性

book2.setPrice(10);

book2.setTitle("c++程序设计");

book2.setSubjects(sj2);

book2.setNo("2");

//将书节点添加到跟节点

books.addBook(book2);

XMap xmp = new XMap();

xmp.register(Books.class);

List filters = new ArrayList();

String content = xmp.asXmlString(books, "UTF-8", filters, true);

IoUtils.WriteFile(content, "UTF-8", "books.xml");

} catch (Exception e) {

e.printStackTrace();

}

}

}

/**==================================================**/

package test;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream;

import java.net.URL;

import org.nuxeo.common.xmap.XMap;

public class XmlToObjectDemo {

public static void main(String[] args) {

try {

XMap xmp = new XMap();

xmp.register(Books.class);

//URL url = new File("books.xml").toURL();

InputStream in = new FileInputStream(new File("books.xml"));

Object[] result = (Object[]) xmp.loadAll(in);

Books books = (Books) result[0];

for(int i = 0 ; i < books.getBook().size() ; i++)

{

Book book = books.getBook().get(i);

System.out.println(book.getNo());

System.out.println(book.getPrice());

System.out.println(book.getTitle());

System.out.println(book.getSubjects().get(i));

}

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

/**==================================================**/

java是傻逼

java

xml

10

c++程序设计

C++

c

10