JSSDKHelper rename to JSSDKConfigurator & 重构了token类

weixin4j-server/src/main/java/com/foxinmy/weixin4j/util/DigestUtils.java

@@ -12,7 +12,7 @@ import java.security.NoSuchAlgorithmException;
  * @since JDK 1.6
  * @see
  */
-public final class DigestUtil {
+public final class DigestUtils {
 
 	private static MessageDigest getDigest(final String algorithm) {
 		try {

weixin4j-server/src/main/java/com/foxinmy/weixin4j/util/MessageUtil.java

@@ -35,7 +35,7 @@ public final class MessageUtil {
 		for (String str : para) {
 			sb.append(str);
 		}
-		return DigestUtil.SHA1(sb.toString());
+		return DigestUtils.SHA1(sb.toString());
 	}
 
 	/**