GzipUtils-Gzip解壓縮String

package com.bilibili.payplatform.utils;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;

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

/** * Created by carloszhang * on 2018/5/30. */
public class GZIPUtils {


    public static String compress(String str) throws IOException {
        if (StringUtils.isBlank(str)) {
            return str;
        }
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        GZIPOutputStream gzip = new GZIPOutputStream(out);
        gzip.write(str.getBytes());
        gzip.close();
        String outStr = new String(Base64.encodeBase64(out.toByteArray()));
        return outStr;
    }

    public static String uncompress(String str) throws IOException {
        if (StringUtils.isBlank(str)) {
            return str;
        }
        GZIPInputStream gis = new GZIPInputStream(new ByteArrayInputStream(Base64.decodeBase64(str)));
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        IOUtils.copy(gis, out);
        return new String(out.toByteArray());
    }

    public static void main(String[] args) throws Exception {

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 500; i++) {
            sb.append(UUID.randomUUID().toString() + UUID.randomUUID().toString() + UUID.randomUUID().toString());
        }
        String str = sb.toString();
        String str1 = GZIPUtils.compress(sb.toString());
        String result = GZIPUtils.uncompress(str1);
        System.out.println("原長度：" + str.length());
        System.out.println("壓縮後字符串：" + str1);
        System.out.println("壓縮後字符串長度：" + str1.length());
        System.out.println(result.equals(str));
        System.out.println("解壓縮後字符串：" + result);
    }

}

複製代碼