diff --git a/json/build.go b/json/build.go
index e85aafb..c888656 100644
--- a/json/build.go
+++ b/json/build.go
@@ -8,6 +8,7 @@
 package json
 
 import (
+	"fmt"
 	"strings"
 
 	"github.com/go-developer/gopkg/easylock"
@@ -25,10 +26,11 @@ const (
 //
 // Date : 10:33 下午 2021/3/10
 type JSONode struct {
-	Key    string      // json key
-	Value  interface{} // 对应的值
-	Child  []*JSONode  // 子节点
-	IsRoot bool        // 是否根节点
+	Key              string      // json key
+	Value            interface{} // 对应的值
+	Child            []*JSONode  // 子节点
+	IsRoot           bool        // 是否根节点
+	IsHasLastBrother bool        // 在此之后是否有其他兄弟节点
 }
 
 // NewDynamicJSON 获取JSON实例
@@ -72,6 +74,7 @@ func (dj *DynamicJSON) SetValue(path string, value interface{}) {
 	for keyIndex, key := range pathList {
 		searchRoot = dj.search(searchRoot, key)
 		if nil != searchRoot {
+			searchRoot.Value = value // 查询到结果,更新值
 			parent = searchRoot
 		} else {
 			var val interface{}
@@ -79,12 +82,66 @@ func (dj *DynamicJSON) SetValue(path string, value interface{}) {
 				val = value
 			}
 			_ = dj.createNode(parent, key, val)
-			searchRoot = parent.Child[0]
-			parent = parent.Child[0]
+			searchRoot = parent.Child[len(parent.Child)-1]
+			parent = parent.Child[len(parent.Child)-1]
 		}
 	}
 }
 
+// String 获取字符串的格式JSON
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 2:16 下午 2021/3/11
+func (dj *DynamicJSON) String() string {
+	tplList := make([]string, 0)
+	valList := make([]interface{}, 0)
+	tplListResult, valListResult := dj.buildTpl(dj.root, &tplList, &valList)
+	return fmt.Sprintf(strings.Join(*tplListResult, ""), *valListResult...)
+}
+
+// buildTpl 构建json模版与绑定数据
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 4:38 下午 2021/3/11
+func (dj *DynamicJSON) buildTpl(root *JSONode, tplList *[]string, valList *[]interface{}) (*[]string, *[]interface{}) {
+	if nil == root {
+		*tplList = append(*tplList, "}")
+		return tplList, valList
+	}
+	key := "\"" + root.Key + "\""
+	if len(root.Child) > 0 {
+		if root.IsRoot {
+			*tplList = append(*tplList, "{")
+		} else {
+			*tplList = append(*tplList, key+":{")
+		}
+	} else {
+		if root.IsHasLastBrother {
+			*tplList = append(*tplList, key+":%v,")
+		} else {
+			*tplList = append(*tplList, key+":%v")
+		}
+		switch val := root.Value.(type) {
+		case string:
+			*valList = append(*valList, "\""+val+"\"")
+		default:
+			*valList = append(*valList, root.Value)
+		}
+		return tplList, valList
+	}
+	for _, node := range root.Child {
+		dj.buildTpl(node, tplList, valList)
+	}
+	if root.IsHasLastBrother {
+		*tplList = append(*tplList, "},")
+	} else {
+		*tplList = append(*tplList, "}")
+	}
+	return tplList, valList
+}
+
 // Search 搜索一个key TODO : 优化
 //
 // Author : go_developer@163.com<张德满>
@@ -118,11 +175,16 @@ func (dj *DynamicJSON) createNode(parent *JSONode, key string, value interface{}
 	if parent.Child == nil {
 		parent.Child = make([]*JSONode, 0)
 	}
+	if len(parent.Child) > 0 {
+		// 存在子节点，设置当前子节点还有其他兄弟节点
+		parent.Child[len(parent.Child)-1].IsHasLastBrother = true
+	}
 	parent.Child = append(parent.Child, &JSONode{
-		Key:    key,
-		Value:  value,
-		Child:  make([]*JSONode, 0),
-		IsRoot: false,
+		Key:              key,
+		Value:            value,
+		Child:            make([]*JSONode, 0),
+		IsRoot:           false,
+		IsHasLastBrother: false,
 	})
 	dj.nodeCnt++
 	_ = dj.lock.Unlock("")
diff --git a/json/json_test.go b/json/json_test.go
index b7b6f88..da4960b 100644
--- a/json/json_test.go
+++ b/json/json_test.go
@@ -15,6 +15,12 @@ import (
 func TestJSON(t *testing.T) {
 	tree := NewDynamicJSON()
 	tree.SetValue("extra.height.value", 180)
-	tree.SetValue("extra.height.unit", "cm")
-	fmt.Println(tree.root)
+	tree.SetValue("extra.height.unit.use", "cm")
+	tree.SetValue("extra.height.unit.open", "1")
+	tree.SetValue("name", "zhangdeman")
+	tree.SetValue("good.name", "good")
+	tree.SetValue("work", "111")
+	tree.SetValue("good.price", "180")
+	tree.SetValue("good.unit", "$")
+	fmt.Println(tree.String())
 }