package util;  
  
  
import java.io.ByteArrayOutputStream;  
import java.io.File;  
import java.io.FileWriter;  
import java.io.StringReader;  
  
import org.jdom.Document;     
import org.jdom.input.SAXBuilder;     
import org.jdom.output.Format;     
import org.jdom.output.XMLOutputter;     
    
/**   
 * JDOM 方式操作XML   
 *    
 * @author Watson Xu   
 * @date 2011-5-3 下午02:20:49   
 */    
public class OperationXMLByJdom {     
    /**   
     * DOCUMENT格式化輸出儲存為XML   
     *    
     * @param doc JDOM的Document   
     * @param filePath 輸出檔案路徑   
     * @throws Exception   
     */    
    public static void doc2XML(Document doc, String filePath) throws Exception{     
        Format format = Format.getCompactFormat();      
        format.setEncoding("UTF-8"); //設定XML檔案的字元為UTF-8     
        format.setIndent("     ");//設定縮排      
         
        XMLOutputter outputter = new XMLOutputter(format);//定義輸出 ,在元素後換行，每一層元素縮排四格      
        FileWriter writer = new FileWriter(filePath);//輸出流     
        outputter.output(doc, writer);     
        writer.close();     
    }     
         
    /**   
     * 字串轉換為DOCUMENT   
     *    
     * @param xmlStr 字串   
     * @return doc JDOM的Document   
     * @throws Exception   
     */    
    public static Document string2Doc(String xmlStr) throws Exception {     
        java.io.Reader in = new StringReader(xmlStr);     
        Document doc = (new SAXBuilder()).build(in);            
        return doc;     
    }     
    
    /**   
     * Document轉換為字串   
     *    
     * @param xmlFilePath XML檔案路徑   
     * @return xmlStr 字串   
     * @throws Exception   
     */    
    public static String doc2String(Document doc) throws Exception {     
        Format format = Format.getPrettyFormat();     
        format.setEncoding("UTF-8");// 設定xml檔案的字元為UTF-8，解決中文問題     
        XMLOutputter xmlout = new XMLOutputter(format);     
        ByteArrayOutputStream bo = new ByteArrayOutputStream();     
        xmlout.output(doc, bo);     
        return bo.toString();     
    }     
    
    /**   
     * XML轉換為Document   
     *    
     * @param xmlFilePath XML檔案路徑   
     * @return doc Document物件   
     * @throws Exception   
     */    
    public static Document xml2Doc(String xmlFilePath) throws Exception {     
        File file = new File(xmlFilePath);     
        return (new SAXBuilder()).build(file);     
    }     
         
    public static void main(String[] args) {     
        try{     
            Document doc = xml2Doc("test.xml");     
            System.out.println(doc);     
            System.out.println(doc2String(doc));     
            doc = string2Doc(doc2String(doc));     
            doc2XML(doc, "1.xml");     
        } catch (Exception e) {     
            e.printStackTrace();     
        }     
             
    }     
}