diff --git a/encoding/json/json.go b/encoding/json/json.go
new file mode 100644
index 0000000..a5b981c
--- /dev/null
+++ b/encoding/json/json.go
@@ -0,0 +1 @@
+package json
diff --git a/encoding/json/number.go b/encoding/json/number.go
new file mode 100644
index 0000000..5cddf22
--- /dev/null
+++ b/encoding/json/number.go
@@ -0,0 +1,11 @@
+package json
+
+import "encoding/json"
+
+func NumberToInt(n json.Number) (int, error) {
+	n64, err := n.Int64()
+	if nil != err {
+		return 0, err
+	}
+	return int(n64), nil
+}