Java实现上传下载
一、上传
二、下载
1 import java.io.BufferedInputStream; 2 import java.io.BufferedOutputStream; 3 import java.io.File; 4 import java.io.FileInputStream; 5 import java.io.IOException; 6 import java.io.InputStream; 7 import java.io.OutputStream; 8 import java.net.URLEncoder; 9 10 import javax.servlet.http.HttpServletResponse; 11 12 public class DownloadFileUtil { 13 /** 14 * 弹窗下载 15 * @param response 16 * @param filePath 17 * 文件所在路径 18 * @param fileName 19 * 文件名 20 */ 21 public void downFile(HttpServletResponse response, String filePath, 22 String fileName) { 23 try { 24 String path = filePath + fileName; 25 File file = new File(path); 26 if (file.exists()) { 27 InputStream ins = new FileInputStream(path); 28 BufferedInputStream bins = new BufferedInputStream(ins);// 放到缓冲流里面 29 OutputStream outs = response.getOutputStream();// 获取文件输出IO流 30 BufferedOutputStream bouts = new BufferedOutputStream(outs); 31 response.setContentType("application/x-download");// 设置response内容的类型 32 response.setHeader("Content-disposition","attachment;filename=" 33 + URLEncoder.encode(fileName, "GBK"));// 设置头部信息 34 int bytesRead = 0; 35 byte[] buffer = new byte[8192]; 36 // 开始向网络传输文件流 37 while ((bytesRead = bins.read(buffer, 0, 8192)) != -1) { 38 bouts.write(buffer, 0, bytesRead); 39 } 40 bouts.flush();// 这里一定要调用flush()方法 41 ins.close(); 42 bins.close(); 43 outs.close(); 44 bouts.close(); 45 } 46 } catch (IOException e) { 47 e.printStackTrace(); 48 } 49 } 50 }
有一篇不错的文章：http://blog.csdn.net/chow__zh/article/details/9288793#comments
