diff --git a/src/main/java/com/alibaba/druid/support/http/WebStatFilter.java b/src/main/java/com/alibaba/druid/support/http/WebStatFilter.java
index d14b539e29..af419f5ee2 100644
--- a/src/main/java/com/alibaba/druid/support/http/WebStatFilter.java
+++ b/src/main/java/com/alibaba/druid/support/http/WebStatFilter.java
@@ -32,8 +32,16 @@ import com.alibaba.druid.util.DruidWebUtils;
 import com.alibaba.druid.util.PatternMatcher;
 import com.alibaba.druid.util.ServletPathMatcher;
 
+/**
+ * 用于配置Web和Druid数据源之间的管理关联监控统计
+ * 
+ * @author wenshao <szujobs@htomail.com>
+ * @author Zhangming Qi <qizhanming@gmail.com>
+ */
 public class WebStatFilter implements Filter {
 
+    private final static Log             LOG                               = LogFactory.getLog(WebStatFilter.class);
+
     public final static String           PARAM_NAME_SESSION_STAT_ENABLE    = "sessionStatEnable";
     public final static String           PARAM_NAME_SESSION_STAT_MAX_COUNT = "sessionStatMaxCount";
     public static final String           PARAM_NAME_EXCLUSIONS             = "exclusions";
@@ -42,8 +50,6 @@ public class WebStatFilter implements Filter {
 
     public final static int              DEFAULT_MAX_STAT_SESSION_COUNT    = 1000 * 100;
 
-    private final static Log             LOG                               = LogFactory.getLog(WebStatFilter.class);
-
     private WebAppStat                   webAppStat                        = null;
     private WebStatFilterContextListener statFilterContextListener         = new WebStatFilterContextListener();
     /**