使用java zip 压缩文件目录-优快云博客

本文介绍了一个使用Java实现的文件压缩方法。通过示例代码展示了如何将指定目录下的文件压缩成ZIP格式，并添加了校验和以确保压缩文件的完整性和一致性。此方法利用了`FileOutputStream`、`CheckedOutputStream`及`ZipOutputStream`等类来完成文件的压缩过程。

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@Test
    public void testPackageContent() {
        try {
            FileOutputStream f = 
                new FileOutputStream(BASE_PATH + "/../" + packageName + ".zip");
            CheckedOutputStream csum = 
                new CheckedOutputStream(f, new Adler32());//Adler32 is faster than CRC32
            ZipOutputStream out = 
                new ZipOutputStream(new BufferedOutputStream(csum));
            out.setComment("some comments");
            File srcDir = new File(BASE_PATH);
            zipFile(out, srcDir, "packageName");
            out.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * zip the given file
     * @param out - ZipOutputStream
     * @param srcDir - if it is a file then add this file into zip, if it is dir, then call zipFile cascade
     * @param filePath - the filepath in zipfile
     * @throws IOException
     */
    private void zipFile(ZipOutputStream out, File srcDir, String filePath) throws IOException{
        for(File file : srcDir.listFiles()){
            if(file.isDirectory()){
                zipFile(out, file, filePath+"/"+file.getName());
                continue;
            }
            Logger.global.info("Writing file : "+file.getName());
            FileInputStream in = new FileInputStream(file);
            out.putNextEntry(new ZipEntry(filePath+"/"+file.getName()));
            byte[] b = new byte[1024];
            int off = 0;
            while((in.read(b,off,1024)) != -1){
                out.write(b);
            }
            in.close();
        }
    }