只需使用 java.util.Base64 替换它。

另一种方法类似下面的代码片段：

import java.util.Base64;

public class MyClass {
    public static void main(String[] args) {
        String originalString = "Hello, World!";
        
        // Encoding to Base64
        String encodedString = Base64.getEncoder().encodeToString(originalString.getBytes());
        System.out.println("Encoded String: " + encodedString);
        
        // Decoding from Base64
        byte[] decodedBytes = Base64.getDecoder().decode(encodedString);
        String decodedString = new String(decodedBytes);
        System.out.println("Decoded String: " + decodedString);
    }
}