diff --git a/motan-core/src/main/java/com/weibo/api/motan/transport/ProviderProtectedMessageRouter.java b/motan-core/src/main/java/com/weibo/api/motan/transport/ProviderProtectedMessageRouter.java
index 410c305e4..788dd4df2 100644
--- a/motan-core/src/main/java/com/weibo/api/motan/transport/ProviderProtectedMessageRouter.java
+++ b/motan-core/src/main/java/com/weibo/api/motan/transport/ProviderProtectedMessageRouter.java
@@ -16,10 +16,6 @@
 
 package com.weibo.api.motan.transport;
 
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentMap;
-import java.util.concurrent.atomic.AtomicInteger;
-
 import com.weibo.api.motan.common.URLParamType;
 import com.weibo.api.motan.exception.MotanErrorMsgConstant;
 import com.weibo.api.motan.exception.MotanServiceException;
@@ -30,31 +26,32 @@
 import com.weibo.api.motan.util.LoggerUtil;
 import com.weibo.api.motan.util.MotanFrameworkUtil;
 
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.atomic.AtomicInteger;
+
 /**
  * TODO 可配置化策略
- * 
+ * <p>
  * provider 消息处理分发：支持一定程度的自我防护
- * 
+ * <p>
  * <pre>
- * 
- * 
- * 		1) 如果接口只有一个方法，那么直接return true 
+ *
+ * 		1) 如果接口只有一个方法，那么直接return true
  * 		2) 如果接口有多个方法，那么如果单个method超过 maxThread / 2 && totalCount >  (maxThread * 3 / 4)，那么return false;
  * 		3) 如果接口有多个方法(4个)，同时总的请求数超过 maxThread * 3 / 4，同时该method的请求数超过 maxThead * 1 / 4， 那么return false
  * 		4) 其他场景return true
- * 
+ *
  * </pre>
- * 
+ *
  * @author maijunsheng
  * @version 创建时间：2013-6-7
- * 
  */
 public class ProviderProtectedMessageRouter extends ProviderMessageRouter {
     protected ConcurrentMap<String, AtomicInteger> requestCounters = new ConcurrentHashMap<String, AtomicInteger>();
     protected AtomicInteger totalCounter = new AtomicInteger(0);
 
 
-
     public ProviderProtectedMessageRouter() {
         super();
     }
diff --git a/motan-registry-zookeeper/src/main/java/com/weibo/api/motan/registry/zookeeper/ZkNodeType.java b/motan-registry-zookeeper/src/main/java/com/weibo/api/motan/registry/zookeeper/ZkNodeType.java
index 8dfe8793b..c259623da 100644
--- a/motan-registry-zookeeper/src/main/java/com/weibo/api/motan/registry/zookeeper/ZkNodeType.java
+++ b/motan-registry-zookeeper/src/main/java/com/weibo/api/motan/registry/zookeeper/ZkNodeType.java
@@ -1,7 +1,17 @@
 package com.weibo.api.motan.registry.zookeeper;
 
 public enum ZkNodeType {
-    AVAILABLE_SERVER,
-    UNAVAILABLE_SERVER,
-    CLIENT
+    AVAILABLE_SERVER("server"),
+    UNAVAILABLE_SERVER("unavailableServer"),
+    CLIENT("client");
+
+    private String value;
+
+    private ZkNodeType(String value) {
+        this.value = value;
+    }
+
+    public String getValue() {
+        return value;
+    }
 }
diff --git a/motan-registry-zookeeper/src/main/java/com/weibo/api/motan/registry/zookeeper/ZkUtils.java b/motan-registry-zookeeper/src/main/java/com/weibo/api/motan/registry/zookeeper/ZkUtils.java
index 4e97389f1..94f78c6e0 100644
--- a/motan-registry-zookeeper/src/main/java/com/weibo/api/motan/registry/zookeeper/ZkUtils.java
+++ b/motan-registry-zookeeper/src/main/java/com/weibo/api/motan/registry/zookeeper/ZkUtils.java
@@ -1,7 +1,6 @@
 package com.weibo.api.motan.registry.zookeeper;
 
 import com.weibo.api.motan.common.MotanConstants;
-import com.weibo.api.motan.exception.MotanFrameworkException;
 import com.weibo.api.motan.rpc.URL;
 
 public class ZkUtils {
@@ -19,17 +18,7 @@ public static String toCommandPath(URL url) {
     }
 
     public static String toNodeTypePath(URL url, ZkNodeType nodeType) {
-        String type;
-        if (nodeType == ZkNodeType.AVAILABLE_SERVER) {
-            type = "server";
-        } else if (nodeType == ZkNodeType.UNAVAILABLE_SERVER) {
-            type = "unavailableServer";
-        } else if (nodeType == ZkNodeType.CLIENT) {
-            type = "client";
-        } else {
-            throw new MotanFrameworkException(String.format("Failed to get nodeTypePath, url: %s type: %s", url, nodeType.toString()));
-        }
-        return toServicePath(url) + MotanConstants.PATH_SEPARATOR + type;
+        return toServicePath(url) + MotanConstants.PATH_SEPARATOR + nodeType.getValue();
     }
 
     public static String toNodePath(URL url, ZkNodeType nodeType) {
diff --git a/motan-springsupport/src/main/java/com/weibo/api/motan/config/springsupport/ServiceConfigBean.java b/motan-springsupport/src/main/java/com/weibo/api/motan/config/springsupport/ServiceConfigBean.java
index a1ce09259..bdb0ba639 100644
--- a/motan-springsupport/src/main/java/com/weibo/api/motan/config/springsupport/ServiceConfigBean.java
+++ b/motan-springsupport/src/main/java/com/weibo/api/motan/config/springsupport/ServiceConfigBean.java
@@ -16,33 +16,23 @@
 
 package com.weibo.api.motan.config.springsupport;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-import java.util.Map;
-
+import com.weibo.api.motan.common.MotanConstants;
+import com.weibo.api.motan.config.*;
+import com.weibo.api.motan.exception.MotanErrorMsgConstant;
+import com.weibo.api.motan.exception.MotanFrameworkException;
+import com.weibo.api.motan.util.CollectionUtil;
+import com.weibo.api.motan.util.MotanFrameworkUtil;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.BeansException;
-import org.springframework.beans.factory.BeanFactory;
-import org.springframework.beans.factory.BeanFactoryAware;
-import org.springframework.beans.factory.DisposableBean;
-import org.springframework.beans.factory.InitializingBean;
-import org.springframework.beans.factory.ListableBeanFactory;
-import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.*;
 import org.springframework.beans.factory.config.BeanPostProcessor;
 import org.springframework.context.ApplicationListener;
 import org.springframework.context.event.ContextRefreshedEvent;
 
-import com.weibo.api.motan.common.MotanConstants;
-import com.weibo.api.motan.config.BasicServiceInterfaceConfig;
-import com.weibo.api.motan.config.ConfigUtil;
-import com.weibo.api.motan.config.ProtocolConfig;
-import com.weibo.api.motan.config.RegistryConfig;
-import com.weibo.api.motan.config.ServiceConfig;
-import com.weibo.api.motan.exception.MotanErrorMsgConstant;
-import com.weibo.api.motan.exception.MotanFrameworkException;
-import com.weibo.api.motan.util.CollectionUtil;
-import com.weibo.api.motan.util.MotanFrameworkUtil;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
 
 public class ServiceConfigBean<T> extends ServiceConfig<T>
         implements
@@ -117,7 +107,7 @@ private void checkAndConfigBasicConfig() {
                 }
                 if (MotanNamespaceHandler.basicServiceConfigDefineNames.size() == 1) {
                     setBasicServiceConfig(biConfig);
-                } else if (biConfig.isDefault() != null && biConfig.isDefault().booleanValue()) {
+                } else if (biConfig.isDefault() != null && biConfig.isDefault()) {
                     setBasicServiceConfig(biConfig);
                 }
             }