Unified toPath method (#2754)

apm-sniffer/apm-sdk-plugin/resteasy-plugin/resteasy-server-3.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/resteasy/v3/server/SynchronousDispatcherInterceptor.java

@@ -77,8 +77,9 @@ public class SynchronousDispatcherInterceptor implements InstanceMethodsAroundIn
     }
 
     private static String toPath(String uri) {
-        if (uri.contains("?")) {
-            return uri.substring(0, uri.indexOf("?"));
+        int index = uri.indexOf("?");
+        if (index > -1) {
+            return uri.substring(0, index);
         } else {
             return uri;
         }