download.java

来自「ERO系统.针对生产型、分销型、服务型企业等不同的行业特点」· Java 代码 · 共 65 行

/*
 *this file is part of nseer erp
 *Copyright (C)2006-2010 Nseer(Beijing) Technology co.LTD/http://www.nseer.com 
 *
 *This program is free software; you can redistribute it and/or
 *modify it under the terms of the GNU General Public License
 *as published by the Free Software Foundation; either
 *version 2 of the License, or (at your option) any later version.
 */
package include.nseer_cookie;

import java.io.*;
import java.util.*;
import javax.servlet.http.*;


public class download {

	public void download(HttpServletResponse response, String filename)
			throws IOException {
		StringTokenizer tokenTO = new StringTokenizer(filename, "\\");
		int j = 0;
		String[] filepath1 = new String[10];
		while (tokenTO.hasMoreTokens()) {
			filepath1[j] = tokenTO.nextToken();
			j++;
		}
		String filepath = "";
		for (int m = 0; m < j - 1; m++) {
			filepath = filepath + filepath1[m] + "\\";
		}
		filepath = filepath + filepath1[j - 1];
		File down_file = new java.io.File(filepath);
		long l = down_file.length(); // 文件长度
		InputStream in = new FileInputStream(down_file);

		if (in != null) {
			try {
				String fs = down_file.getName();
				response.reset();
				response.setContentType("application/x-download"); //
				String s = "attachment; filename=" + fs; //
				response.setHeader("Content-Disposition", s); // 以上输出文件元信息

				OutputStream output = null;
				FileInputStream fis = null;

				output = response.getOutputStream();
				fis = new FileInputStream(filepath);
				response.setContentLength((int) l);
				byte[] b = new byte[2048];
				int i = 0;
				while ((i = fis.read(b)) > 0) {
					output.write(b, 0, i);
				}
				output.flush();
				in.close();
			} catch (Exception e) {
				e.printStackTrace();
			}

		}
	}

}