java-zip格式处理

创建压缩文件

把 f1.txt 和 f2.txt 压缩为一个 test 压缩文件：

public void yasuoFile() throws Exception {
    try (ZipOutputStream zos = new ZipOutputStream(new FileOutputStream("test.zip"))) {
        zos.setLevel(Deflater.BEST_COMPRESSION);
        ZipEntry ze1 = new ZipEntry("f1.txt");
        zos.putNextEntry(ze1);
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("f1.txt"));
        byte[] buffer = new byte[1024];
        int len = -1;
        while ((len = bis.read(buffer, 0, buffer.length)) != -1) {
            zos.write(buffer, 0, len);
        }
        bis.close();
        ZipEntry ze2 = new ZipEntry("f2.txt");
        zos.putNextEntry(ze2);
        BufferedInputStream bis2 = new BufferedInputStream(new FileInputStream("f2.txt"));
        byte[] buffer2 = new byte[1024];
        int len2 = -1;
        while ((len2 = bis2.read(buffer2, 0, buffer2.length)) != -1) {
            zos.write(buffer2, 0, len2);
        }
        bis2.close();
        zos.closeEntry();
    }
}

解压压缩文件

在把 test 压缩文件解压到 test 目录下：

public void jieyaFile() throws Exception {
    try (ZipInputStream zis = new ZipInputStream(new FileInputStream("test.zip"))) {
        ZipEntry entry = null;
        while ((entry = zis.getNextEntry()) != null) {
            String name = entry.getName();
            String path = "test" + File.separator + name;
            File file = new File(path);
            if (!file.getParentFile().exists()) {
                file.getParentFile().mkdirs();
            }
            file.createNewFile();
            BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));
            byte[] buffer = new byte[1024];
            int len = -1;
            while ((len = zis.read(buffer, 0, buffer.length)) != -1) {
                bos.write(buffer, 0, len);
            }
            bos.close();
        }
    }
}

读写压缩文件中内容列表

public void list() throws Exception {
    // 老版写法
    // ZipFile f = new ZipFile("test.zip");
    // Enumeration<? extends ZipEntry> e = f.entries();
    // while (e.hasMoreElements()) {
    //     ZipEntry ze = e.nextElement();
    //     System.out.println(ze.getName());
    // }

    // 新版写法
    ZipFile f = new ZipFile("test.zip");
    f.stream().forEach(entry -> System.out.println(entry.getName()));
}

/// 输入的内容：
f1.txt
f2.txt