xml和java Bean的直接转换，Xmap

最近项目中用到了xml和java bean的转换
用到xml的时候我们需要遍历解析。。。然后将解析的值放入声明好的java bean，过程很痛苦，结果很美好
我们能不能直接从xml转化到java bean呢，或者直接成java bean转化到xml呢？
答案是OK的
使用jar包：org.heibo.xbean

写个小例子
XML

<?xml version="1.0" encoding="UTF-8"?>
 <books>
 <book no="1">
 <title>java是傻逼</title>
 <subject>java</subject>
 <subject>xml</subject>
 <price>10</price>
 </book>
 <book no="2">
 <title>c++程序设计</title>
 <subject>C++</subject>
 <subject>c</subject>
 <price>10</price>
 </book>
 </books>

<?xml version="1.0" encoding="UTF-8"?>
<books>
<book no="1">
<title>java是傻逼</title>
<subject>java</subject>
<subject>xml</subject>
<price>10</price>
</book>
<book no="2">
<title>c++程序设计</title>
<subject>C++</subject>
<subject>c</subject>
<price>10</price>
</book>
</books>

Books类

import java.util.ArrayList;
 import java.util.List;

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

 @XObject(value = "books")
 public class Books {
     @XNodeList(value = "book", type = ArrayList.class, componentType = Book.class)
     private List<Book> book;

     public List<Book> getBook() {
         return book;
    }

     public void setBook(List<Book> book) {
         this.book = book;
    }

     public void addBook(Book b){
         if(book==null){
             book=new ArrayList<Book>();
        }
        book.add(b);
    }
}

import java.util.ArrayList;
import java.util.List;

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

@XObject(value = "books")
public class Books {    
    @XNodeList(value = "book", type = ArrayList.class, componentType = Book.class)
    private List<Book> book;
    
    public List<Book> getBook() {
        return book;
    }

    public void setBook(List<Book> book) {
        this.book = book;
    }
    
    public void addBook(Book b){
        if(book==null){
            book=new ArrayList<Book>();
        }
        book.add(b);
    }
}

Book类

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;


 @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<String> subjects;

     @XNode("price")
     private int   price;

     public String getTitle() {
         return title;
    }

     public void setTitle(String title) {
         this.title = title;
    }

     public List<String> getSubjects() {
         return subjects;
    }

     public void setSubjects(List<String> 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;
    }
}

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;


@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<String> subjects;
    
    @XNode("price")
    private int   price;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public List<String> getSubjects() {
        return subjects;
    }

    public void setSubjects(List<String> 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;
    }
}

测试类：

import java.util.ArrayList;
 import java.util.List;

 import org.nuxeo.common.xmap.XMap;


 public class XmapTest {
     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<String> sj=new ArrayList<String>();
             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<String> sj2=new ArrayList<String>();
             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<String> filters = new ArrayList<String>();

             System.out.println(xmp.asXmlString(books, "UTF-8", filters, true));
         } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import java.util.ArrayList;
import java.util.List;

import org.nuxeo.common.xmap.XMap;


public class XmapTest {
    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<String> sj=new ArrayList<String>();
            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<String> sj2=new ArrayList<String>();
            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<String> filters = new ArrayList<String>();

            System.out.println(xmp.asXmlString(books, "UTF-8", filters, true));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

运行上面这个类就可以生成开头所看见的那个XML的内容

解析xml

xmap.register(Books.class);
             URL url = new File("book.xml").toURL();
             InputStream in = new FileInputStream(new File("book.xml"));
            Object[] result = (Object[]) xmap.loadAll(in);

 Books books=(Books)result[0];

xmap.register(Books.class);
            URL url = new File("book.xml").toURL();
            InputStream in = new FileInputStream(new File("book.xml"));
            Object[] result = (Object[]) xmap.loadAll(in);

Books books=(Books)result[0];

数据就完全autowire by name进入到了bean，某些情况下很好用（xml很整齐，每个节点的内容都一样，固定）

http://lywybo.iteye.com/blog/468556