java实现zip,gzip,7z,zlib格式的压缩打包

摘要：前言利用原生类和的实现的压缩打包依赖格式读入需要下载的文件的内容，打包到文件打包设置压缩文件里的文件名打包打包

利用Java原生类和apache的commons实现zip,gzip,7z,zlib的压缩打包

maven依赖

 
            org.apache.commons
            commons-compress
            1.12
          

zip格式

public static void zip(String input, String output, String name) throws Exception {
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(output));
        String[] paths = input.split("|");
        File[] files = new File[paths.length];
        byte[] buffer = new byte[1024];
        for (int i = 0; i < paths.length; i++) {
            files[i] = new File(paths[i]);
        }
        for (int i = 0; i < files.length; i++) {
            FileInputStream fis = new FileInputStream(files[i]);
            if (files.length == 1 && name != null) {
                out.putNextEntry(new ZipEntry(name));
            } else {
                out.putNextEntry(new ZipEntry(files[i].getName()));
            }
            int len;
            // 读入需要下载的文件的内容，打包到zip文件
            while ((len = fis.read(buffer)) > 0) {
                out.write(buffer, 0, len);
            }
            out.closeEntry();
            fis.close();
        }
        out.close();
    }

gzip打包

public static void gzip(String input, String output, String name) throws Exception {
        String compress_name = null;
        if (name != null) {
            compress_name = name;
        } else {
            compress_name = new File(input).getName();
        }
        byte[] buffer = new byte[1024];
        try {
            GzipParameters gp = new GzipParameters();    //设置压缩文件里的文件名
            gp.setFilename(compress_name);
            GzipCompressorOutputStream gcos = new GzipCompressorOutputStream(new FileOutputStream(output), gp);
            FileInputStream fis = new FileInputStream(input);
            int length;
            while ((length = fis.read(buffer)) > 0) {
                gcos.write(buffer, 0, length);
            }
            fis.close();
            gcos.finish();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }

7z打包

public static void z7z(String input, String output, String name) throws Exception {
        try {
            SevenZOutputFile sevenZOutput = new SevenZOutputFile(new File(output));
            SevenZArchiveEntry entry = null;

            String[] paths = input.split("|");
            File[] files = new File[paths.length];
            for (int i = 0; i < paths.length; i++) {
                files[i] = new File(paths[i].trim());
            }
            for (int i = 0; i < files.length; i++) {
                BufferedInputStream instream = null;
                instream = new BufferedInputStream(new FileInputStream(paths[i]));
                if (name != null) {
                    entry = sevenZOutput.createArchiveEntry(new File(paths[i]), name);
                } else {
                    entry = sevenZOutput.createArchiveEntry(new File(paths[i]), new File(paths[i]).getName());
                }
                sevenZOutput.putArchiveEntry(entry);
                byte[] buffer = new byte[1024];
                int len;
                while ((len = instream.read(buffer)) > 0) {
                    sevenZOutput.write(buffer, 0, len);
                }
                instream.close();
                sevenZOutput.closeArchiveEntry();
            }
            sevenZOutput.close();
        } catch (IOException ioe) {
            System.out.println(ioe.toString() + "  " + input);
        }
    }

zlib打包

public static void zlib(String input, String output) throws Exception {

//        DeflaterOutputStream dos = new DeflaterOutputStream(new FileOutputStream(output));
        DeflateParameters dp = new DeflateParameters();
        dp.setWithZlibHeader(true);
        DeflateCompressorOutputStream dcos = new  DeflateCompressorOutputStream(new FileOutputStream(output),dp);
        FileInputStream fis = new FileInputStream(input);
        int length = (int) new File(input).length();
        byte data[] = new byte[length];
        // int length;
        while ((length = fis.read(data)) > 0) {
            dcos.write(data, 0, length);
        }
        fis.close();
        dcos.finish();
        dcos.close();
    }