/** 缓冲 */static final byte[] buffer = new byte[2048];

// 来源  File inputDir = new File(request.getServletContext()          .getRealPath(Constant.getUploadPath()));  if (null != inputDir.listFiles()) {      // 压缩      zip(inputDir.listFiles(), "", zip);  }

/**      * 压缩ZIP      *       * @param files      *            多个文件      * @param baseFolder      *            压缩到ZIP的父级目录(目录后面跟上File.separator)      * @param zos      *            ZipOutputStream      * @throws Exception      */      private static void zip(File[] files, String baseFolder, ZipOutputStream zos)              throws Exception {          // 输入          FileInputStream fis = null;          // 条目          ZipEntry entry = null;          // 数目          int count = 0;          for (File file : files) {              if (file.isDirectory()) {                  // 递归                  zip(file.listFiles(),  baseFolder + file.getName() + File.separator, zos);                  continue;              }              entry = new ZipEntry(baseFolder + file.getName());              // 加入              zos.putNextEntry(entry);              fis = new FileInputStream(file);              // 读取              while ((count = fis.read(buffer, 0, buffer.length)) != -1) {                  // 写入                  zos.write(buffer, 0, count);              }              zos.closeEntry(); // 释放资源          }      }

记得用完zip要close掉