现把该程序主要代码贴下,供大家需要的时候参考下:

<%@page import="java.util.*, .*, java.text.*, java.util.zip.*, java.io.*" %> <%! static Vector expandFileList(String[] files, boolean inclDirs){ Vector v = new Vector(); if (files == null) return v; for (int j=0; j < files.length; i++) v.add (new File(URLDecoder.decode(files[j]))); for (int i=0; i < v.size(); i++){ File f = (File) v.get(i); if (f.isDirectory()){ File[] fs = f.listFiles(); for (int n = 0; n < fs.length; n++) v.add(fs[n]); if (!inclDirs){ v.remove(i); i--; } } } return v; } class Writer2Stream extends OutputStream{ Writer out; Writer2Stream (Writer w){ super(); out = w; } public void write(int i) throws IOException{ out.write(i); } public void write(byte[] b) throws IOException{ for (int j=0;j<b.length;j++){ int n=b[j]; //Convert byte to ubyte n=((n>>>4)&0xF)*16+(n&0xF); out.write (n); } } public void write(byte[] b, int off, int len) throws IOException{ for (int j = off; j < off + len; j++){ int n=b[j]; n = ((n>>>4)&0xF)*16+(n&0xF); out.write(n); } } } %> <% /////下载压缩文件包 Vector v = expandFileList(request.getParameterValues("selfile"), false); if (v.size() == 0){ request.setAttribute("error", "No files selected"); } else{ File dir_file = new File(request.getRealPath("") + "/myfile/"); int dir_l = dir_file.getAbsolutePath().length(); response.setContentType ("application/zip"); response.setHeader ("Content-Disposition", "attachment;filename="downloadname.rar""); out.clearBuffer(); ZipOutputStream zipout = new ZipOutputStream(new Writer2Stream(out)); zipout.setComment("Download selected files nas one WinRAR file:ndownloadname.rar"); zipout.setLevel

(1); for (int i=0;i<v.size();i++){ File f = (File)v.get(i); if (f.canRead()){ zipout.putNextEntry(new ZipEntry(f.getAbsolutePath().substring(dir_l+1))); BufferedInputStream fr = new BufferedInputStream(new FileInputStream(f)); byte buffer[] = new byte[0xffff]; int b; while ((b=fr.read())!=-1) zipout.write(b); fr.close(); zipout.closeEntry(); } } zipout.finish(); out.flush(); } %>