1.生成zip

public static void main(String[] args) {        try {//            testZip("c:\\temp.txt", "c:\\temp4.zip");//            testZip("c:\\Result.txt", "c:\\temp4.zip");  //不然会被一个文件覆盖了.                        //压缩多个文件的关键: ZipOutputStream out 作为参数传递.            //一个流,否则存在覆盖的问题,即每次会new一个,所以外置.            ZipOutputStream zos = null;             zos = new ZipOutputStream(new FileOutputStream("c:\\temp5.zip"));                         testZip("c:\\temp.txt",zos);            testZip("c:\\Result.txt",zos);                        //外置            zos.closeEntry();            zos.close();                    } catch (Exception e) {            e.printStackTrace();        }    }/**     * 重复压缩文件     * @param zipEntryName  // 去掉String zipEntryName,     * @param filePath     * @param zipPath     * @throws Exception     */    public static void testZip(String filePath,ZipOutputStream zos) throws Exception{                //压缩包                /*ZipOutputStream zos = null;*/                //                BufferedOutputStream bos = null;//                File zipFile = new File(zipPath);//                if(zipFile.exists()==false){
                    /* zos = new ZipOutputStream(new FileOutputStream(zipPath));*/                 //                 bos = new BufferedOutputStream(zos);   //Buffer...//                }else{//                    //                }                                          File f = new File(filePath);                // //create zip        FileInputStream fis = new FileInputStream(f);//        BufferedInputStream bis = new BufferedInputStream(fis);                            // set the file name in the .zip file//        zos.putNextEntry(new ZipEntry(zipEntryName));         zos.putNextEntry(new ZipEntry(f.getName()));        // set the declear        zos.setComment("by zip test!");//        byte[] b = new byte[1024];//        while (true) {//            int len = bis.read(b);//            if (len == -1)//                break;//            bos.write(b, 0, len);//            System.out.println(new String(b, 0, len));//        }//        bos.flush();  //这一行重要,否则txt是空白文件.                byte[] buffer = new byte[1024];         int len = 0 ;         // 读取文件的内容,打包到zip文件             while ((len = fis.read(buffer)) > 0) {             zos.write(buffer, 0, len);         }                 fis.close();        /*zos.closeEntry();        zos.close();*/    }

 

2.解压缩

public static void main(String[] args) throws Exception {        // get a zip file instance        File file = new File("c:\\temp5.zip");        // get a ZipFile instance        ZipFile zipFile = new ZipFile(file);        // create a ZipInputStream instance        ZipInputStream zis = new ZipInputStream(new FileInputStream(file));        // create a ZipEntry instance , lay the every file from        // decompress file temporarily        ZipEntry entry = null;        // a circle to get every file        while ((entry = zis.getNextEntry()) != null) {            System.out.println("decompress file :" + entry.getName());            // define the path to set the file            File outFile = new File("c:\\zip\\"                    + entry.getName());            // if the file's parent directory wasn't exits ,than            // create the directory            if (!outFile.getParentFile().exists()) {                outFile.getParentFile().mkdir();            }            // if the file not exits ,than create the file            if (!outFile.exists()) {                outFile.createNewFile();            }            // create an input stream  读文件            BufferedInputStream bis = new BufferedInputStream(                    zipFile.getInputStream(entry));            // create an output stream 写文件            BufferedOutputStream bos = new BufferedOutputStream(                    new FileOutputStream(outFile));            byte[] b = new byte[1024];            while (true) {                int len = bis.read(b);                if (len == -1)                    break;                bos.write(b, 0, len);            }            // close stream            bis.close();            bos.close();        }        zis.close();    }