Merge pull request #470 from ascrutae/fix/spring-annotation-issue

fix the operation name of spring mvc span is incorrect

apm-sniffer/apm-sdk-plugin/spring-plugins/mvc-annotation-4.x-plugin/src/main/java/org/skywalking/apm/plugin/spring/mvc/ControllerConstructorInterceptor.java

@@ -24,7 +24,11 @@ public class ControllerConstructorInterceptor implements InstanceConstructorInte
         String basePath = "";
         RequestMapping basePathRequestMapping = objInst.getClass().getAnnotation(RequestMapping.class);
         if (basePathRequestMapping != null) {
-            basePath = basePathRequestMapping.value()[0];
+            if (basePathRequestMapping.value().length > 0) {
+                basePath = basePathRequestMapping.value()[0];
+            } else if (basePathRequestMapping.path().length > 0) {
+                basePath = basePathRequestMapping.path()[0];
+            }
         }
         PathMappingCache pathMappingCache = new PathMappingCache(basePath);
         objInst.setSkyWalkingDynamicField(pathMappingCache);