数据压缩的方法（未验证）

package common;import java.io.*;import org.apache.tools.zip.*;public class Zip{private static void zipDirectory(ZipOutputStream zos, String dirName,String basePath) throws Exception{File dir = new File(dirName);if (dir.exists()){File files[] = dir.listFiles();if (files.length > 0){for (File file : files){if (file.isDirectory()){zipDirectory(zos, file.getPath(), basePath+ file.getName().substring(file.getName().lastIndexOf(File.separator) + 1)+ File.separator);}elsezipFile(zos, file.getPath(), basePath);}}else{ZipEntry ze = new ZipEntry(basePath);zos.putNextEntry(ze);}}}private static void  zipFile(ZipOutputStream zos, String filename,String basePath) throws Exception{File file = new File(filename);     if (file.exists()){FileInputStream fis = new FileInputStream(filename);ZipEntry ze = new ZipEntry(basePath + file.getName());zos.putNextEntry(ze);byte[] buffer = new byte[8192];int count = 0;while ((count = fis.read(buffer)) > 0){zos.write(buffer, 0, count);}fis.close();}}public static void compress(String zipFilename, String... paths)throws Exception{compress(new FileOutputStream(zipFilename), paths);}public static void  compress(OutputStream os, String... paths)throws Exception{ZipOutputStream zos = new ZipOutputStream(os);for (String path : paths){if(path.equals("")) continue;java.io.File file = new java.io.File(path);if (file.exists()){if (file.isDirectory()){zipDirectory(zos, file.getPath(), file.getName() + File.separator);}else{zipFile(zos, file.getPath(), "");}}}zos.close();}}

2 调用方法：

protected javax.servlet.http.HttpServletResponse response;Zip.compress(response.getOutputStream(), names);