Java 字符串压缩与解压的开发记录

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.binary.Base64;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
/**
 * 压缩String的工具类
 */
@Slf4j
public class CompressUtil {
    /**
     * 使用gzip压缩字符串
     * @param str 要压缩的字符串
     * @return 压缩后的字符串
     */
    public static String compress(String str) {
        if (str == null || str.length() <= 0) {
            return str;
        }
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        try (GZIPOutputStream gzip = new GZIPOutputStream(out)) {
            gzip.write(str.getBytes(StandardCharsets.UTF_8));
        } catch (IOException e) {
            log.error("字符串压缩失败str:{}，错误信息:{}", str, e.getMessage());
            throw new RuntimeException("字符串压缩失败");
        }
        return Base64.encodeBase64String(out.toByteArray());
    }
    /**
     * 使用gzip解压缩
     * @param compressedStr 压缩字符串
     * @return 解压后的字符串
     */
    public static String uncompress(String compressedStr) {
        if (compressedStr == null || compressedStr.length() <= 0) {
            return compressedStr;
        }
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ByteArrayInputStream in;
        GZIPInputStream gzip = null;
        byte[] compressed;
        String decompressed;
        try {
            compressed = Base64.decodeBase64(compressedStr);
            in = new ByteArrayInputStream(compressed);
            gzip = new GZIPInputStream(in);
            byte[] buffer = new byte[1024];
            int offset;
            while ((offset = gzip.read(buffer)) != -1) {
                out.write(buffer, 0, offset);
            }
            decompressed = out.toString(StandardCharsets.UTF_8.name());
        } catch (IOException e) {
            log.error("字符串解压失败compressedStr:{}，错误信息:{}", compressedStr, e.getMessage());
            throw new RuntimeException("字符串解压失败");
        } finally {
            if (gzip != null) {
                try {
                    gzip.close();
                } catch (IOException ignored) {
                }
            }
            try {
                out.close();
            } catch (IOException ignored) {
            }
        }
        return decompressed;
    }
}

import org.junit.Test;
public class CompressUtilTest {
    @Test
    public void test1() {
        StringBuilder stringBuilder = new StringBuilder();
        for(int i = 0;i < 100000;i++) {
            stringBuilder.append("1");
        }
        System.out.println(stringBuilder.toString().length());
        String compress = CompressUtil.compress(stringBuilder.toString());
        System.out.println("compress="+compress);
        System.out.println(compress.length());
        String uncompress = CompressUtil.uncompress(compress);
        System.out.println(uncompress.length());
        System.out.println("uncompress=" + uncompress);
    }
}