J 2 EEファイルダウンロードツール類

package com.sgcc.ahepc.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;

import javax.servlet.http.HttpServletResponse;

import org.dom4j.DocumentException;


public class FileUtil {
	public static void downFile(String path,String filename,HttpServletResponse response) throws DocumentException, IOException{  

			 response.setContentType("multipart/form-data");       
			 response.setCharacterEncoding("UTF-8");
			 response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(filename,"UTF-8"));
			 String sep = System.getProperty("file.separator"); 
			
			 String filePath = path+sep+filename;
			 InputStream is = new FileInputStream(new File(filePath));
			 OutputStream os = response.getOutputStream();
			 byte[] b= new byte[1024];
			 int length;
			 while((length = is.read(b)) > 0){
				 os.write(b,0,length);
			 }
			 os.flush();
			 os.close();
			 is.close();
    }  
	
}