Java压缩字符串

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.Deflater;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

public class StringCompressionExample {
    
    public static byte[] compressGzip(String data) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        GZIPOutputStream gzip = new GZIPOutputStream(bos);
        gzip.write(data.getBytes());
        gzip.close();
        byte[] compressedData = bos.toByteArray();
        bos.close();
        return compressedData;
    }
    
    public static String decompressGzip(byte[] compressedData) throws IOException {
        ByteArrayInputStream bis = new ByteArrayInputStream(compressedData);
        GZIPInputStream gzip = new GZIPInputStream(bis);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len;
        while ((len = gzip.read(buffer)) != -1) {
            bos.write(buffer, 0, len);
        }
        gzip.close();
        bis.close();
        bos.close();
        return bos.toString();
    }
    
    public static byte[] compressDeflate(String data) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        Deflater deflater = new Deflater();
        deflater.setInput(data.getBytes());
        deflater.finish();
        byte[] buffer = new byte[1024];
        while (!deflater.finished()) {
            int count = deflater.deflate(buffer);
            bos.write(buffer, 0, count);
        }
        deflater.end();
        byte[] compressedData = bos.toByteArray();
        bos.close();
        return compressedData;
    }
    
    // Decompressing Deflate data is not as straightforward as Gzip, as it does not contain headers and footers.
    // You will need to implement your own decompression logic or use a third-party library.

    public static void main(String[] args) throws IOException {
        String originalString = "This is a sample string to compress.";
        
        // Gzip compression and decompression
        byte[] compressedData = compressGzip(originalString);
        String decompressedString = decompressGzip(compressedData);
        
        System.out.println("Original String: " + originalString);
        System.out.println("Compressed Gzip Data: " + new String(compressedData));
        System.out.println("Decompressed Gzip String: " + decompressedString);
        
        // Deflate compression
        byte[] compressedDataDeflate = compressDeflate(originalString);
        System.out.println("Compressed Deflate Data: " + new String(compressedDataDeflate));
    }
}