JAVA之MD5加密字节流再进行Base64编码

应用场景：待签名数据以UTF-8的格式转字节流，对字节流进行MD5算法得到的签名字节流，再经过Base64转换为字符串，即生成签名。 

import java.security.MessageDigest;
/**
 * 需要引入的共同jar包
 * apache-commons-codec-1.4.jar
 */
import org.apache.commons.codec.binary.Base64;
import java.util.Date;
/**
 * 方式二，需要引入的jar包
 * sun.misc.BASE64Encoder.jar
 */
import sun.misc.BASE64Encoder;
 
/**
 * 文件名称: Md5.java
 * 功能说明:对字节流进行MD5算法处理，然后base64编码
 */
public class Md5{
    public static void main(String[] args) throws Exception {    
    	//String timestamp = String.valueOf(new Date().getTime());//获取当前13位时间戳
        String timestamp="1566869002135";//模拟当前13位时间戳
        String charset="utf-8";//编码
        String secretKey="123456789";//模拟秘钥
        String Sign = doSin(timestamp, charset, secretKey);
        System.out.println(Sign);
        String Source = getSign(timestamp, charset, secretKey);
        System.out.println(Source);
    }
    /**
     * Base64.encodeBase64模式
     * @param timestamp
     * @param charset
     * @param secretKey
     * @return String 'DFZ16dpGQ3MQDttv2LHOmw=='
     * @throws Exception
     */
	public static String doSin(String timestamp, String charset, String secretKey) throws Exception{
		String sign ="";
		String content = timestamp+secretKey;
		try {
			MessageDigest md = MessageDigest.getInstance( "MD5");
			md.update(content.getBytes(charset));
			sign = new String(Base64.encodeBase64(md.digest()),charset);
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
		return sign;
	 } 
	/**
	 * BASE64Encoder模式 
	 * @param timestamp
	 * @param charset
	 * @param secretKey
	 * @return String 'DFZ16dpGQ3MQDttv2LHOmw=='
	 * @throws Exception
	 */
	public static String getSign(String timestamp, String charset, String secretKey) throws Exception{
		String sign = "";
		String content = timestamp+secretKey;
		MessageDigest digest = MessageDigest.getInstance("MD5");
		byte[] bts = digest.digest(content.getBytes(charset));
		BASE64Encoder encoder = new BASE64Encoder();
		sign = encoder.encode(bts);
		return sign;
	} 
}

所需jar包下载地址：https://download.youkuaiyun.com/download/netuser1937/11618341
JAVA与PHP相同加密结果
参考PHP版：https://blog.youkuaiyun.com/netuser1937/article/details/100097964