fix bugs

kgraph-graph/src/main/java/com/kgraph/graph/neo4j/controller/Neo4jRelationController.java

@@ -21,8 +21,8 @@ public class Neo4jRelationController extends BaseController {
     }
 
     @GetMapping("/{id}")
-    public Neo4jRelation findById(@PathVariable("id") Long id) {
-        return service.findById(id);
+    public AjaxResult findById(@PathVariable("id") Long id) {
+        return success(service.findById(id));
     }
 
     @PostMapping()