java字符串压缩和字符串解压

运行效果

java工具类

CompressUtil.java

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import org.apache.commons.codec.binary.Base64;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

public class CompressUtil {

	/**
	 * 字符串的压缩
	 *
	 * @param str 待压缩的字符串
	 * @return 返回压缩后的字符串
	 * @throws IOException
	 */
	public static String compress(String str) throws IOException {
		if (null == str || str.length() <= 0) {
			return null;
		}
		// 创建一个新的 byte 数组输出流
		ByteArrayOutputStream out = new ByteArrayOutputStream();
		// 使用默认缓冲区大小创建新的输出流
		GZIPOutputStream gzip = new GZIPOutputStream(out);
		// 将 b.length 个字节写入此输出流
		gzip.write(str.getBytes("UTF-8"));
		gzip.close();
		// 使用指定的 charsetName，通过解码字节将缓冲区内容转换为字符串
		return out.toString("ISO-8859-1");
	}

	public static String compressEncode(Object res) throws IOException {
		String json = JSON.toJSONString(res, SerializerFeature.DisableCircularReferenceDetect);
		String com = compress(json);
		if (null == com) {
			return null;
		}
		String base = Base64.encodeBase64String(com.getBytes("ISO-8859-1"));
		return base;
	}

	// 压缩字符串
	public static String compressEncode(String res) throws IOException {
		String com = compress(res);
		if (null == com) {
			return null;
		}
		String base = Base64.encodeBase64String(com.getBytes("ISO-8859-1"));
		return base;
	}

	// 解压字符串
	public static String decompressEncode(String zipString) {
		byte[] bArr = Base64.decodeBase64(zipString);
		try (ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bArr);
				GZIPInputStream gZIPInputStream = new GZIPInputStream(byteArrayInputStream);
				BufferedReader bufferedReader = new BufferedReader(
						new InputStreamReader(gZIPInputStream, StandardCharsets.UTF_8))) {
			StringBuilder sb2 = new StringBuilder();
			String readLine;
			while ((readLine = bufferedReader.readLine()) != null) {
				sb2.append(readLine);
			}
			return sb2.toString();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	public static void main(String[] args) throws IOException {
		String a = "[{\"imgBase64\":\"data:image/png;base64,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\",\"tileNum\":\"219542_107123_18\"},{\"imgBase64\":\"data:image/png;base64,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\",\"tileNum\":\"219542_107124_18\"}]";
		System.out.println("原始字符串长度：" + a.length() + "  内容：" + a);

		String compressEncode = compressEncode(a);
		System.out.println("压缩字符串长度：" + compressEncode.length() + "  内容：" + compressEncode);

		String decompressEncode = decompressEncode(compressEncode);

		System.out.println("解压字符串长度：" + decompressEncode.length() + "  内容：" + decompressEncode);
	}
}

https://blog.csdn.net/weixin_42274229/article/details/124796502