add webStat support

src/main/java/com/alibaba/druid/support/http/stat/WebAppStatManager.java

@@ -1,5 +1,8 @@
 package com.alibaba.druid.support.http.stat;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
 import java.util.Properties;
 import java.util.Set;
 import java.util.concurrent.CopyOnWriteArraySet;
@@ -24,6 +27,19 @@ public class WebAppStatManager {
         return webAppStatSet;
     }
 
+    public List<Map<String, Object>> getWebAppStatData() {
+        Set<Object> stats = getWebAppStatSet();
+
+        List<Map<String, Object>> statDataList = new ArrayList<Map<String, Object>>(stats.size());
+
+        for (Object stat : stats) {
+            Map<String, Object> statData = WebAppStatUtils.getStatData(stat);
+            statDataList.add(statData);
+        }
+
+        return statDataList;
+    }
+
     public void addWebAppStatSet(Object webAppStat) {
         getWebAppStatSet().add(webAppStat);
     }

src/main/java/com/alibaba/druid/support/http/stat/WebAppStatUtils.java

@@ -0,0 +1,24 @@
+package com.alibaba.druid.support.http.stat;
+
+import java.lang.reflect.Method;
+import java.util.Map;
+
+import com.alibaba.druid.support.logging.Log;
+import com.alibaba.druid.support.logging.LogFactory;
+
+public class WebAppStatUtils {
+
+    private final static Log LOG = LogFactory.getLog(WebAppStatUtils.class);
+
+    @SuppressWarnings("unchecked")
+    public static Map<String, Object> getStatData(Object webStat) {
+        try {
+            Method method = webStat.getClass().getMethod("getStatData");
+            Object obj = method.invoke(webStat);
+            return (Map<String, Object>) obj;
+        } catch (Exception e) {
+            LOG.error("getStatData error", e);
+            return null;
+        }
+    }
+}