java Gzip将json压缩成byte数组

黎明前的守护 / 2024-10-10 / 原文

import org.apache.commons.lang3.StringUtils;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

public class TestController {

    public static byte[] compress(String str) {
        if (StringUtils.isEmpty(str)) return null;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        GZIPOutputStream gzip;
        try {
            gzip = new GZIPOutputStream(out);
            gzip.write(str.getBytes(StandardCharsets.UTF_8));
            gzip.close();
        } catch ( Exception e) {
            e.printStackTrace();
        }
        return out.toByteArray();
    }

    public static String uncompressToString(byte[] bytes) {
        if (bytes == null || bytes.length == 0) return null;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ByteArrayInputStream in = new ByteArrayInputStream(bytes);
        try {
            GZIPInputStream ungzip = new GZIPInputStream(in);
            byte[] buffer = new byte[1024];
            int n;
            while ((n = ungzip.read(buffer)) >= 0) {
                out.write(buffer, 0, n);
            }
            return out.toString(String.valueOf(StandardCharsets.UTF_8));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
        String json = "{\"i\":20241009,\"n\":\"张三丰\",\"g\":18,\"s\":0,\"d\":\"北戴河\"}";
        byte[] compress = compress(json);
        System.out.println("JSON to Byte: " + Arrays.toString(compress));
        String uncompressed = uncompressToString(compress);
        System.out.println("Byte to JSON : " + uncompressed);
    }

}