编辑代码

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.Base64;

public class UnzipDecodeExample {

    public static void main(String[] args) {
        // 输入 Base64 压缩字符串
        
        // String input = "UEsDBBQACAAIAAAAAAAAAAAAAAAAAAAAAAABAAAAMEpMSjY0MgYEAAD//1BLBwhcuwLPDAAAAAYAAABQSwECFAAUAAgACAAAAAAAXLsCzwwAAAAGAAAAAQAAAAAAAAAAAAAAAAAAAAAAMFBLBQYAAAAAAQABAC8AAAA7AAAAAAA=";
        String input = "UEsDBBQACAgIAEFcjFkAAAAAAAAAAAAAAAABAAAAMEtMSjY0MgYAUEsHCFy7As8IAAAABgAAAA==";
        // String input = "UEsDBBQACAgIADeji1kAAAAAAAAAAAAAAAABAAAAMEtMSjY0MgYAUEsHCFy7As8IAAAABgAAAA==";

        // 调用解压方法
        String result = unzipDecode(input, true);

        // 输出解压后的结果
        System.out.println("Decoded and Unzipped String:");
        System.out.println(result);
    }

    public static String unzipDecode(String zipStr, boolean isZip) {
        String unzipStr = "";
        try {
            // Base64 解码
            byte[] unzip = Base64.getDecoder().decode(zipStr);
            if (isZip) {
                // 解压缩
                unzipStr = decompress(unzip);
            } else {
                // 转为字符串
                unzipStr = new String(unzip, "UTF-8");
            }
        } catch (Exception e) {
            System.out.println(zipStr + "，解压解密失败: " + e.getCause());
            e.printStackTrace();
        }
        return unzipStr;
    }

    private static String decompress(byte[] compressed) {
        if (compressed == null) {
            return null;
        }

        ByteArrayOutputStream out = null;
        ByteArrayInputStream in = null;
        ZipInputStream zin = null;
        String decompressed = null;

        try {
            out = new ByteArrayOutputStream();
            in = new ByteArrayInputStream(compressed);
            zin = new ZipInputStream(in);

            // 获取 ZIP 文件的第一个条目
            ZipEntry entry = zin.getNextEntry();
            if (entry != null) {
                byte[] buffer = new byte[1024];
                int offset;
                while ((offset = zin.read(buffer)) != -1) {
                    out.write(buffer, 0, offset);
                }
                decompressed = out.toString("UTF-8");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (zin != null) zin.close();
                if (in != null) in.close();
                if (out != null) out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return decompressed;
    }
}