java實現文件下載功能代碼

 
import java.io.BufferedOutputStream;
import java.io.OutputStream;
import java.net.URLEncoder;

import javax.servlet.http.HttpServletResponse;
/**

java實現文件下載功能代碼
創建時間：2014年12月23日
@version
*/
public class FileDownload {
/**

@param response
@param filePath      //文件完整路徑(包括文件名和擴展名)
@param fileName      //下載后看到的文件名
@return  文件名
*/
public static void fileDownload(final HttpServletResponse response, String filePath, String fileName) throws Exception{

 byte[] data = FileUtil.toByteArray3(filePath); 
 fileName = URLEncoder.encode(fileName, "UTF-8"); 
 response.reset(); 
 response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\""); 
 response.addHeader("Content-Length", "" + data.length); 
 response.setContentType("application/octet-stream;charset=UTF-8"); 
 OutputStream outputStream = new BufferedOutputStream(response.getOutputStream()); 
 outputStream.write(data); 
 outputStream.flush(); 
 outputStream.close(); 


}




}</pre>