JavaによるBASE64実装

import java.io.IOException;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class BASE64 {
    /**
     * BASE64復号化
     * 
     * @param value
     * @return
     * @throws IOException IO異常
     * @throws Exception
     */
    public static byte[] decryptBASE64(String value) throws IOException {
        return (new BASE64Decoder()).decodeBuffer(value);
    }

    /**
     * BASE64暗号化
     * 
     * @param bytes
     * @return
     * @throws Exception
     */
    public static String encryptBASE64(byte[] bytes) {
        return (new BASE64Encoder()).encodeBuffer(bytes);
    }

    public static void main (String []args) throws IOException {
        String value = "あいうえおabcde";
        System.out.println(value);
        String encryptedValue = encryptBASE64("あいうえおabcde".getBytes());
        System.out.println(encryptedValue);
        
        byte []bytes = decryptBASE64(encryptedValue);
        System.out.println(new String(bytes));
    }
}