diff --git a/build.gradle b/build.gradle
index 645891b..fe3e73a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -36,7 +36,7 @@ repositories {
 }
 
 dependencies {
-    api 'com.google.code.gson:gson:2.8.6'
+    api 'com.google.code.gson:gson:2.8.7'
     api 'log4j:log4j:1.2.17'
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13.2'
 }
diff --git a/src/main/java/org/bdware/mockjava/JsonUtil.java b/src/main/java/org/bdware/mockjava/JsonUtil.java
index 724d4a8..4f4edcb 100644
--- a/src/main/java/org/bdware/mockjava/JsonUtil.java
+++ b/src/main/java/org/bdware/mockjava/JsonUtil.java
@@ -8,13 +8,14 @@ import java.util.Set;
 
 public class JsonUtil {
     private static Set<Object> recorded = null;
+
     public static JsonElement toJson(jdk.nashorn.api.scripting.ScriptObjectMirror res) {
         recorded = new HashSet<>();
         JsonElement jsonElement = copyInternal(res);
         recorded.clear();
-        ;
         return jsonElement;
     }
+
     private static JsonElement copyInternal(Object obj) {
         if (recorded.contains(obj)) return JsonNull.INSTANCE;
         if (obj == null) return JsonNull.INSTANCE;
diff --git a/src/main/java/org/bdware/mockjava/JsonVisitor.java b/src/main/java/org/bdware/mockjava/JsonVisitor.java
index e98ad29..652b8b6 100644
--- a/src/main/java/org/bdware/mockjava/JsonVisitor.java
+++ b/src/main/java/org/bdware/mockjava/JsonVisitor.java
@@ -6,8 +6,16 @@ import com.google.gson.JsonObject;
 import com.google.gson.JsonPrimitive;
 
 public abstract class JsonVisitor {
+    JsonElement result;
+
+    public JsonElement get() {
+        return result;
+    }
+
     public JsonVisitor visit(JsonElement ele) {
-        if (ele == null) return null;
+        if (null == ele) {
+            return null;
+        }
         if (ele.isJsonArray()) {
             return visitJsonArray((JsonArray) ele);
         } else if (ele.isJsonObject()) {
@@ -18,7 +26,20 @@ public abstract class JsonVisitor {
         }
     }
 
-    public abstract JsonVisitor visitObject(JsonObject asJsonObject);
+    public JsonVisitor visitObject(JsonObject jsonObject) {
+        JsonObject jo = new JsonObject();
+        for (String key : jsonObject.keySet()) {
+            JsonElement origin = jsonObject.get(key);
+            visit(origin);
+            JsonElement je = get();
+            if (origin.isJsonArray()) {
+                key += "|" + Math.min(((JsonArray) origin).size(), 20);
+            }
+            jo.add(key, je);
+        }
+        result = jo;
+        return this;
+    }
 
     public abstract JsonVisitor visitJsonArray(JsonArray ele);
 
diff --git a/src/main/java/org/bdware/mockjava/MockSchemaParser.java b/src/main/java/org/bdware/mockjava/MockSchemaParser.java
index 29e148d..82ae1c7 100644
--- a/src/main/java/org/bdware/mockjava/MockSchemaParser.java
+++ b/src/main/java/org/bdware/mockjava/MockSchemaParser.java
@@ -1,37 +1,14 @@
 package org.bdware.mockjava;
 
 import com.google.gson.JsonArray;
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
 import com.google.gson.JsonPrimitive;
 
 public class MockSchemaParser extends JsonVisitor {
     public static MockSchemaParser instance = new MockSchemaParser();
-    JsonElement result;
-
-    public JsonElement get() {
-        return result;
-    }
-
-    @Override
-    public JsonVisitor visitObject(JsonObject jsonObject) {
-        JsonObject jo = new JsonObject();
-        for (String key : jsonObject.keySet()) {
-            JsonElement origin = jsonObject.get(key);
-            visit(origin);
-            JsonElement je = get();
-            if (origin.isJsonArray()) {
-                key += "|" + Math.min(((JsonArray) origin).size(), 20);
-            }
-            jo.add(key, je);
-        }
-        result = jo;
-        return this;
-    }
 
     @Override
     public JsonVisitor visitJsonArray(JsonArray array) {
-         JsonArray ret = new JsonArray();
+        JsonArray ret = new JsonArray();
         if (array.size() > 0) {
             visit(array.get(0));
             ret.add(result);
@@ -46,8 +23,9 @@ public class MockSchemaParser extends JsonVisitor {
             result = new JsonPrimitive("@boolean");
         } else if (primitive.isNumber()) {
             result = new JsonPrimitive("@integer");
+        } else {
+            result = new JsonPrimitive("@string");
         }
-        result = new JsonPrimitive("@string");
         return this;
     }
 }
\ No newline at end of file
diff --git a/src/main/java/org/bdware/mockjava/MockUtil.java b/src/main/java/org/bdware/mockjava/MockUtil.java
index 210166c..68c52a6 100644
--- a/src/main/java/org/bdware/mockjava/MockUtil.java
+++ b/src/main/java/org/bdware/mockjava/MockUtil.java
@@ -19,8 +19,8 @@ public class MockUtil {
         MOCK_JS_ENGINE = new ScriptEngineManager().getEngineByName("JavaScript");
         // System.out.println(MOCK_JS_ENGINE);
         try (InputStream mockJs =
-                        MockUtil.class.getClassLoader().getResourceAsStream(MOCK_JS_PATH);
-                InputStreamReader reader = new InputStreamReader(mockJs); ) {
+                     MockUtil.class.getClassLoader().getResourceAsStream(MOCK_JS_PATH);
+             InputStreamReader reader = new InputStreamReader(mockJs)) {
             MOCK_JS_ENGINE.eval(reader);
         } catch (ScriptException | IOException e) {
             // log.error("执行MockJs错误", e);
@@ -31,7 +31,7 @@ public class MockUtil {
 
     private static boolean isJson(String str) {
         try {
-            JsonObject jsonStr = JsonParser.parseString(str).getAsJsonObject();
+            JsonParser.parseString(str).getAsJsonObject();
             return true;
         } catch (Exception e) {
             return false;
@@ -39,7 +39,7 @@ public class MockUtil {
     }
 
     public static Object mock(String template) {
-        Object result = (ScriptObjectMirror) ScriptObjectMirror.wrap(null, Context.getGlobal());
+        Object result = ScriptObjectMirror.wrap(null, Context.getGlobal());
         if (template.length() > 0) {
             try {
                 //