java 生成XML 文件

1.背景:

上一篇关于XML 的文章<<java 解析dom 树方式来解析XML文件>>  http://blog.youkuaiyun.com/nx188/article/details/51417535  ,  说的是java 解析XML,

本文是java 代码将java bean 转化生成XML 文件

2.用的 jar 包是 

jdom.jar

3.代码:

package XMLGenerate;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;

public class Java2XmlFile {
	
	private Book books[] = {
		new Book("1","入门"),
		new Book("2","thinking in java"),
		new Book("3","数据结构"),
		new Book("4","算法到了")
	};
	
	public void formatXML() throws FileNotFoundException, IOException{
		Element root = new Element("books").setAttribute("count", "4");
		Document doc = new Document(root);
		for(int i=0;i<books.length;i++) {
			Element bookElement = new Element("book");
			bookElement.addContent(new Element("id").setText(books[i].getId()));
			bookElement.addContent(new Element("name").setText(books[i].getName()));
			root.addContent(bookElement);
		}
		Format format = Format.getPrettyFormat();
		XMLOutputter XMLOut = new XMLOutputter(format);
		XMLOut.output(doc, new FileOutputStream("books.xml"));
	}
	
	public static void main(String[] args) throws FileNotFoundException, IOException {
		Java2XmlFile java2XmlFile = new Java2XmlFile();
		java2XmlFile.formatXML();
		System.out.println("xml 文件已生成");
	}
}

//实体类
class Book {
	
	private String id;
	private String name ;
	
	
	public Book(String id, String name) {
		super();
		this.name = name;
		this.id = id;
	}
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
}

生成的books.xml 文件如下:

<?xml version="1.0" encoding="UTF-8"?>
<books count="4">
  <book>
    <id>1</id>
    <name>入门</name>
  </book>
  <book>
    <id>2</id>
    <name>thinking in java</name>
  </book>
  <book>
    <id>3</id>
    <name>数据结构</name>
  </book>
  <book>
    <id>4</id>
    <name>算法到了</name>
  </book>
</books>