我如何轻松地在字节数组之间压缩和解压缩字符串？

Question

我有一些字符串，每个字符串大约1万个字符。它们中有很多重复。它们是序列化的JSON对象。我想轻松地将它们压缩为字节数组，然后从字节数组解压缩它们。

我怎样才能最轻松地做到这一点？我正在寻找方法，因此可以执行以下操作：

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

Answer 1

你可以试试

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);
        }
    }
}