Hutool Pro 30 Hot Download

implementation 'cn.hutool:hutool-all:5.8.26'

List<String> list = CollUtil.newArrayList("a", "b", "c");
boolean empty = CollUtil.isEmpty(list);
String joined = CollUtil.join(list, " | "); // a | b | c

// A complete file backup service with logging, crypto, and scheduling
public class BackupService {
    private static final Logger log = LogFactory.get();
public void backupAndEncrypt(String sourcePath, String destPath) {
    File source = FileUtil.file(sourcePath);
    File dest = FileUtil.file(destPath);
// Copy file
    FileUtil.copy(source, dest, true);
    log.info("Copied {} to {}", sourcePath, destPath);
// Encrypt backup
    Aes aes = SecureUtil.aes("my-secret-key-16bytes".getBytes());
    String content = FileUtil.readUtf8String(dest);
    String encrypted = aes.encryptBase64(content);
    FileUtil.writeUtf8String(encrypted, dest);
// Verify
    log.info("Backup encrypted and saved at {}", destPath);
}

}

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