雨一直下、、

package digest;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.SecretKey;import org.a

public static String sign(String secret,Map<String,String> params){ //按参数名asscic码排序 List<String> names=new ArrayList(); names.addAll(params.keySet()); java.util.Collecti