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单文件下载
//下载单个文件 public void downloadFile(HttpServletResponse response){ String path = "D:testce1.txt" File file = new File(path); if(file.exists()){ String fileName = file.getName(); response.setHeader("Content-disposition", "attachment;fileName=" + fileName); download(response,file); } } public void download(HttpServletResponse response,File file){ FileInputStream fis = null; BufferedInputStream bis = null; OutputStream os = null; try { os = response.getoutputStream(); fis = new FileInputStream(file); bis = new BufferedInputStream(fis); byte[] buffer = new byte[bis.available()]; int i = bis.read(buffer); while(i != -1){ os.write(buffer, 0, i); i = bis.read(buffer); } } catch (Exception e) { e.printstacktrace(); } try { bis.close(); fis.close(); os.close(); } catch (IOException e) { e.printstacktrace(); } }
多文件压缩下载
//多个文件，压缩成zip后下载 public void downloadMoreFile(HttpServletResponse response) { String test1= "D:testce1.txt"; String test2= "D:testce2.txt"; File tfile= new File(test1); File cfile= new File(test2); List files = new ArrayList(); files.add(tfile); files.add(cfile); if (tfile.exists() && cfile.exists()) { String zipTmp = "D:testce1.zip"; zipd(zipTmp,files,response); } } public void zipd(String zipTmp,List files,HttpServletResponse response){ File zipTmpFile = new File(zipTmp); try { if (zipTmpFile.exists()) { zipTmpFile.delete(); } zipTmpFile.createNewFile(); response.reset(); // 创建文件输出流 FileOutputStream fous = new FileOutputStream(zipTmpFile); ZipOutputStream zipOut = new ZipOutputStream(fous); zipFile(files, zipOut); zipOut.close(); fous.close(); downloadZip(zipTmpFile, response); } catch (IOException e) { e.printstacktrace(); } } //files打成压缩包 public void zipFile(List files, ZipOutputStream outputStream) { int size = files.size(); for (int i = 0; i
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