我如何轻松地压缩和解压缩字节数组？ [英] How can I easily compress and decompress Strings to/from byte arrays?

问题描述

我有一些大约10K字符的字符串。在他们有很多重复。它们是序列化的JSON对象。我想轻松地将它们压缩成一个字节数组，并从一个字节数组解压缩它们。

I have some strings that are roughly 10K characters each. There is plenty of repetition in them. They are serialized JSON objects. I'd like to easily compress them into a byte array, and uncompress them from a byte array.

我最容易做到这一点？我正在寻找方法，所以我可以做以下：

How can I most easily do this? I'm looking for methods so I can do the following:

String original = "....long string here with 10K characters...";
byte[] compressed = StringCompressor.compress(original);
String decompressed = StringCompressor.decompress(compressed);
assert(original.equals(decompressed);

推荐答案

p>您可以尝试

enum StringCompressor {
    ;
    public static byte[] compress(String text) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try {
            OutputStream out = new DeflaterOutputStream(baos);
            out.write(text.getBytes("UTF-8"));
            out.close();
        } catch (IOException e) {
            throw new AssertionError(e);
        }
        return baos.toByteArray();
    }

    public static String decompress(byte[] bytes) {
        InputStream in = new InflaterInputStream(new ByteArrayInputStream(bytes));
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try {
            byte[] buffer = new byte[8192];
            int len;
            while((len = in.read(buffer))>0)
                baos.write(buffer, 0, len);
            return new String(baos.toByteArray(), "UTF-8");
        } catch (IOException e) {
            throw new AssertionError(e);
        }
    }
}

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