import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import sun.misc.BASE64Encoder;

public class Base64Encryption

{

    public static void main(String[] args) throws IOException

    {

        BufferedReader reader = null;

        while (true)

        {

            System.out.println("请输入密码：");

            reader = new BufferedReader(new InputStreamReader(System.in));

            String input = reader.readLine();

            if (null == input || "".equals(input))

            {

                System.out.println("密码不能为空！ 请重新输入");

                continue;

            }

            String output = new BASE64Encoder().encodeBuffer(input.getBytes());

            System.out.println(output);

            break;

        }

    }

}

@javac Base64Encryption.java

@java Base64Encryption

@pause