BASE64编码解码

Base64Util.java

package com.zby.util;

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

public class Base64Util {
    private static final BASE64Encoder ENCODER = new BASE64Encoder();
    private static final BASE64Decoder DECODER = new BASE64Decoder();

    private Base64Util() {
        throw new RuntimeException("NO!");
    }

    public static String encode(byte[] data) {
        return ENCODER.encodeBuffer(data);
    }

    public static byte[] decode(String data) throws Exception {
        return DECODER.decodeBuffer(data);
    }

    public static String encodeFromString(String data) {
        return encode(data.getBytes());
    }

    public static String decodeToString(String data) throws Exception {
        return new String(decode(data));
    }
}

TestBase64.java

package com.zby;

import com.zby.util.Base64Util;

public class TestBase64 {

    public static void main(String[] args) throws Exception {
        String data = "Hello,World!";
        System.out.println("源字符串：" + data);
        String encoded = Base64Util.encodeFromString(data);
        System.out.println("Base64加密后字符串：" + encoded);
        String decoded = Base64Util.decodeToString(encoded);
        System.out.println("Base64解密后字符串：" + decoded);
    }

}

控制台输出：

源字符串：Hello,World!
Base64加密后字符串：SGVsbG8sV29ybGQh

Base64解密后字符串：Hello,World!