diff --git a/README.md b/README.md
index 09518b8..8b99400 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,39 @@
 # grconfig
 
-111
\ No newline at end of file
+使用方法直接看 `grconfig_test.go`
+
+```go
+import "golib.gaore.com/GaoreGo/grconfig"
+```
+
+```go
+type Dsn struct {
+    User   string `yaml:"user"`
+    Pass   string `yaml:"pass"`
+    Host   string `yaml:"host"`
+    Port   int    `yaml:"port"`
+    Name   string `yaml:"name"`
+    Driver string `yaml:"driver"`
+    Prefix string `yaml:"prefix"`
+}
+
+var items = make(map[string]*Dsn)
+
+// 一级
+gr := New("conf/")
+fmt.Println(gr.Item("db", &items))
+fmt.Printf("%+v\n", items["default"])
+
+// 二级
+a := new(Dsn)
+gr.Item("db.default", &a)
+fmt.Printf("%+v\n", a)
+
+// 解释字符串
+fmt.Println("直接解释字符串", gr.String("db.default.host"))
+
+// item形式解释符串
+var s string
+gr.Item("db.default.host", &s)
+fmt.Println("item形式解释符串:", s)
+```
\ No newline at end of file
diff --git a/conf/db.yaml b/conf/db.yaml
new file mode 100644
index 0000000..048cf61
--- /dev/null
+++ b/conf/db.yaml
@@ -0,0 +1,8 @@
+default:
+  user: "jenkins"
+  pass: "123412412"
+  host: "rm-w23232z93xv4dds00rl.mysql.rds.aliyuncs.com"
+  port: 3306
+  name: "gr_jenkins"
+  driver: "mysql"
+  prefix: "gr_"
\ No newline at end of file
diff --git a/conf/dev/db.yaml b/conf/dev/db.yaml
new file mode 100644
index 0000000..048cf61
--- /dev/null
+++ b/conf/dev/db.yaml
@@ -0,0 +1,8 @@
+default:
+  user: "jenkins"
+  pass: "123412412"
+  host: "rm-w23232z93xv4dds00rl.mysql.rds.aliyuncs.com"
+  port: 3306
+  name: "gr_jenkins"
+  driver: "mysql"
+  prefix: "gr_"
\ No newline at end of file
diff --git a/conf/test.yaml b/conf/test.yaml
deleted file mode 100644
index 1e6c2cc..0000000
--- a/conf/test.yaml
+++ /dev/null
@@ -1 +0,0 @@
-Aa: "hello world"
\ No newline at end of file
diff --git a/grconfig.go b/grconfig.go
index 14fdc4f..091dfcb 100644
--- a/grconfig.go
+++ b/grconfig.go
@@ -29,8 +29,8 @@ func (conf *Configer) getData(item string) (ch ConfigerChannelInterface, err err
 	env := os.Getenv("CENTER_RUNMODE")
 	chunks := strings.SplitN(item, ".", 2)
 
-	if len(chunks) < 2 {
-		panic("Item string error")
+	if len(chunks) < 1 {
+		panic("Item string error chunk len must more than 1")
 	}
 
 	if strings.TrimSpace(env) == "" {
@@ -82,6 +82,10 @@ func (conf *Configer) String(item string) string {
 
 func recursiveParse(item string, v interface{}) interface{} {
 
+	if item == "" {
+		return v
+	}
+
 	chunks := strings.SplitN(item, ".", 2)
 
 	if n, err := strconv.Atoi(chunks[0]); err == nil {
@@ -90,7 +94,6 @@ func recursiveParse(item string, v interface{}) interface{} {
 			v = tmp[n]
 		}
 	} else {
-
 		if tmp, ok := v.(map[interface{}]interface{}); reflect.TypeOf(v).Kind() == reflect.Map && ok {
 			v = tmp[chunks[0]]
 		}
diff --git a/grconfig_test.go b/grconfig_test.go
index 2b6c240..5d172ba 100644
--- a/grconfig_test.go
+++ b/grconfig_test.go
@@ -1,12 +1,39 @@
 package grconfig
 
 import (
-	"log"
-	"lot.gaore.com/library/grconfig"
+	"fmt"
 	"testing"
 )
 
 func TestNew(t *testing.T) {
-	gr := grconfig.New("conf/")
-	log.Println(gr.String("test.a"))
+
+	type Dsn struct {
+		User   string `yaml:"user"`
+		Pass   string `yaml:"pass"`
+		Host   string `yaml:"host"`
+		Port   int    `yaml:"port"`
+		Name   string `yaml:"name"`
+		Driver string `yaml:"driver"`
+		Prefix string `yaml:"prefix"`
+	}
+
+	var items = make(map[string]*Dsn)
+
+	// 一级
+	gr := New("conf/")
+	fmt.Println(gr.Item("db", &items))
+	fmt.Printf("%+v\n", items["default"])
+
+	// 二级
+	a := new(Dsn)
+	gr.Item("db.default", &a)
+	fmt.Printf("%+v\n", a)
+
+	// 解释字符串
+	fmt.Println("直接解释字符串", gr.String("db.default.host"))
+
+	// item形式解释符串
+	var s string
+	gr.Item("db.default.host", &s)
+	fmt.Println("item形式解释符串:", s)
 }
diff --git a/yaml.go b/yaml.go
index 0ba931f..1db79b9 100644
--- a/yaml.go
+++ b/yaml.go
@@ -25,6 +25,11 @@ func (conf *ConfigerChannelYAML) String(item string) string {
 
 func (conf *ConfigerChannelYAML) Item(item string, t interface{}) (err error) {
 	chunks := strings.SplitN(item, ".", 2)
+
+	if len(chunks) == 1 {
+		chunks = append(chunks, "")
+	}
+
 	target := recursiveParse(chunks[1], conf.tmp)
 	if target == nil {
 		err = errors.New("item doesn't exists")