diff --git a/lib/oto/commands/util/json.dart b/lib/oto/commands/util/json.dart
index ac67a7c..eec3924 100644
--- a/lib/oto/commands/util/json.dart
+++ b/lib/oto/commands/util/json.dart
@@ -6,54 +6,48 @@ import 'package:oto_cli/cli/cli.dart';
 import 'package:oto_cli/oto/commands/command.dart';
 import 'package:oto_cli/oto/data/command_data.dart';
 
-class JsonReader extends Command {
-  @override
-  Future execute(DataCommand command) async {
-    var data = DataJsonReader.fromJson(getParam(command));
+class JsonBase extends Command {
+  Future setValues(dynamic content, List<DataPair> pair) async {
     try {
-      Map<String, dynamic> temp = data.json is String
-          ? jsonDecode(data.json)
-          : data.json as Map<String, dynamic>;
-      for (var item in data.pair) {
+      Map<String, dynamic> json = content is String
+          ? jsonDecode(content)
+          : content as Map<String, dynamic>;
+      var arrReg = RegExp(r'^([a-zA-Z_]+)\[(\d+)\]$');
+      for (var item in pair) {
+        var temp = json;
         var keys = item.from.split('.');
         for (var i = 0; i < keys.length; ++i) {
           var key = keys[i];
-          if (temp.containsKey(key)) {
-            if (i == keys.length - 1) {
-              await setProperty(item.setValue, temp[keys[i]].toString());
-              break;
+          if(arrReg.hasMatch(key)) {
+            //array case
+            var match = arrReg.firstMatch(key);
+            if(match != null && match.groupCount != 0) {
+              print(match.groupCount);
+              var arrKey = match.group(1);
+              var arrIndex = int.parse(match.group(2)!);
+              if (temp.containsKey(arrKey)) {
+                var arr = temp[arrKey] as List;
+                if(arr.length > arrIndex) {
+                  var value = arr[arrIndex];
+                  if (i == keys.length - 1) {
+                    await setProperty(item.setValue, value.toString());
+                    break;
+                  } else {
+                    temp = value;
+                  }  
+                } else {
+                  throw Exception('Out of range: "$key" in $item');
+                }
+              } else {
+                throw Exception('Not exist key: "$key" in $item');
+              }
             } else {
-              temp = temp[keys[i]];
+              throw Exception('Not exist key: "$key" in $item');
             }
           } else {
-            throw Exception('Not exist key: "$key" in $item');
-          }
-        }
-      }
-    } on Exception catch (e) {
-      throw Exception('Json parsing error: $e');
-    }
-  }
-}
-
-class JsonReaderFile extends Command {
-  @override
-  Future execute(DataCommand command) async {
-    var data = DataJsonReaderFile.fromJson(getParam(command));
-    var path = Command.getAbs(data.path);
-    var file = File(path);
-    if (file.existsSync()) {
-      var content = await file.readAsString();
-      try {
-        Map<String, dynamic> json = jsonDecode(content);
-        for (var item in data.pair) {
-          var temp = json;
-          var keys = item.from.split('.');
-          for (var i = 0; i < keys.length; ++i) {
-            var key = keys[i];
             if (temp.containsKey(key)) {
               if (i == keys.length - 1) {
-                await setProperty(item.setValue, temp[keys[i]].toString());
+                await setProperty(item.setValue, temp[key].toString());
                 break;
               } else {
                 temp = temp[keys[i]];
@@ -62,14 +56,38 @@ class JsonReaderFile extends Command {
               throw Exception('Not exist key: "$key" in $item');
             }
           }
+
+          
         }
-      } on Exception catch (e) {
-        throw Exception('Json parsing error: $e');
       }
+    } on Exception catch (e) {
+      throw Exception('Json parsing error: $e');
+    }
+  }
+}
+
+class JsonReader extends JsonBase {
+  @override
+  Future execute(DataCommand command) async {
+    var data = DataJsonReader.fromJson(getParam(command));
+    await setValues(data.json, data.pair);
+    return complete(0, command);
+  }
+}
+
+class JsonReaderFile extends JsonBase {
+  @override
+  Future execute(DataCommand command) async {
+    var data = DataJsonReaderFile.fromJson(getParam(command));
+    var path = Command.getAbs(data.path);
+    var file = File(path);
+    if (file.existsSync()) {
+      await setValues(await file.readAsString(), data.pair);
     } else {
       await CLI.println('Json "$path" file not exit. Return value to be null.',
           color: Color.red);
     }
+    return complete(0, command);
   }
 }
 
@@ -109,5 +127,6 @@ class JsonWriterFile extends Command {
       await CLI.println('Json "$path" file not exit. Return value to be null.',
           color: Color.red);
     }
+    return complete(0, command);
   }
 }