diff --git a/example/cast/Cast_test.go b/example/cast/CastBasic_test.go
similarity index 96%
rename from example/cast/Cast_test.go
rename to example/cast/CastBasic_test.go
index d194e7f..62c348b 100644
--- a/example/cast/Cast_test.go
+++ b/example/cast/CastBasic_test.go
@@ -12,7 +12,7 @@ import (
 	"testing"
 )
 
-func TestCast(t *testing.T) {
+func TestCastBasic(t *testing.T) {
 	// ToString
 	fmt.Println(cast.ToString("leedarjun"))        // leedarjun
 	fmt.Println(cast.ToString(8))                  // 8
diff --git a/example/cast/CastMap_test.go b/example/cast/CastMap_test.go
new file mode 100644
index 0000000..10cf75c
--- /dev/null
+++ b/example/cast/CastMap_test.go
@@ -0,0 +1,43 @@
+/*
+ *  @Author : huangzj
+ *  @Time : 2020/12/28 9:51
+ *  @Description：
+ */
+
+package cast
+
+import (
+	"fmt"
+	"github.com/spf13/cast"
+	"testing"
+)
+
+func TestCastMap(t *testing.T) {
+	m1 := map[string]string{
+		"name": "darjun",
+		"job":  "developer",
+	}
+
+	m2 := map[string]interface{}{
+		"name": "jingwen",
+		"age":  18,
+	}
+
+	m3 := map[interface{}]string{
+		"name": "pipi",
+		"job":  "designer",
+	}
+
+	m4 := map[interface{}]interface{}{
+		"name": "did",
+		"age":  29,
+	}
+
+	jsonStr := `{"name":"bibi", "job":"manager"}`
+
+	fmt.Println(cast.ToStringMapString(m1))      // map[job:developer name:darjun]
+	fmt.Println(cast.ToStringMapString(m2))      // map[age:18 name:jingwen]
+	fmt.Println(cast.ToStringMapString(m3))      // map[job:designer name:pipi]
+	fmt.Println(cast.ToStringMapString(m4))      // map[job:designer name:pipi]
+	fmt.Println(cast.ToStringMapString(jsonStr)) // map[job:manager name:bibi]
+}
diff --git a/example/cast/CastPoint_test.go b/example/cast/CastPoint_test.go
new file mode 100644
index 0000000..aedfc02
--- /dev/null
+++ b/example/cast/CastPoint_test.go
@@ -0,0 +1,22 @@
+/*
+ *  @Author : huangzj
+ *  @Time : 2020/12/28 9:52
+ *  @Description：
+ */
+
+package cast
+
+import (
+	"fmt"
+	"github.com/spf13/cast"
+	"testing"
+)
+
+func TestCastPoint(t *testing.T) {
+	p := new(int)
+	*p = 8
+	fmt.Println(cast.ToInt(p)) // 8
+
+	pp := &p
+	fmt.Println(cast.ToInt(pp)) // 8
+}
diff --git a/example/cast/CastSlice_test.go b/example/cast/CastSlice_test.go
new file mode 100644
index 0000000..c53cfdc
--- /dev/null
+++ b/example/cast/CastSlice_test.go
@@ -0,0 +1,31 @@
+/*
+ *  @Author : huangzj
+ *  @Time : 2020/12/28 9:52
+ *  @Description：
+ */
+
+package cast
+
+import (
+	"fmt"
+	"github.com/spf13/cast"
+	"testing"
+)
+
+func TestSlice(t *testing.T) {
+	sliceOfInt := []int{1, 3, 7}
+	arrayOfInt := [3]int{8, 12}
+	// ToIntSlice
+	fmt.Println(cast.ToIntSlice(sliceOfInt)) // [1 3 7]
+	fmt.Println(cast.ToIntSlice(arrayOfInt)) // [8 12 0]
+
+	sliceOfInterface := []interface{}{1, 2.0, "darjun"}
+	sliceOfString := []string{"abc", "dj", "pipi"}
+	stringFields := " abc  def hij   "
+	any := interface{}(37)
+	// ToStringSliceE
+	fmt.Println(cast.ToStringSlice(sliceOfInterface)) // [1 2 darjun]
+	fmt.Println(cast.ToStringSlice(sliceOfString))    // [abc dj pipi]
+	fmt.Println(cast.ToStringSlice(stringFields))     // [abc def hij]
+	fmt.Println(cast.ToStringSlice(any))              // [37]
+}
diff --git a/example/cast/CastTimeDuration_test.go b/example/cast/CastTimeDuration_test.go
new file mode 100644
index 0000000..b41c525
--- /dev/null
+++ b/example/cast/CastTimeDuration_test.go
@@ -0,0 +1,34 @@
+/*
+ *  @Author : huangzj
+ *  @Time : 2020/12/28 9:52
+ *  @Description：
+ */
+
+package cast
+
+import (
+	"fmt"
+	"github.com/spf13/cast"
+	"testing"
+	"time"
+)
+
+func TestTimeDuration(t *testing.T) {
+	now := time.Now()
+	timestamp := 1579615973
+	timeStr := "2020-01-21 22:13:48"
+
+	fmt.Println(cast.ToTime(now))       // 2020-01-22 06:31:50.5068465 +0800 CST m=+0.000997701(时间是当前时间，格式如此)
+	fmt.Println(cast.ToTime(timestamp)) // 2020-01-21 22:12:53 +0800 CST
+	fmt.Println(cast.ToTime(timeStr))   // 2020-01-21 22:13:48 +0000 UTC
+
+	d, _ := time.ParseDuration("1m30s")
+	ns := 30000
+	strWithUnit := "130s"
+	strWithoutUnit := "130"
+
+	fmt.Println(cast.ToDuration(d))              // 1m30s
+	fmt.Println(cast.ToDuration(ns))             // 30µs
+	fmt.Println(cast.ToDuration(strWithUnit))    // 2m10s
+	fmt.Println(cast.ToDuration(strWithoutUnit)) // 130ns
+}
diff --git a/example/cast/readme.md b/example/cast/readme.md
index c5a0038..f1bb134 100644
--- a/example/cast/readme.md
+++ b/example/cast/readme.md
@@ -2,4 +2,6 @@
 
 To..方法直接返回转换后的类型
 
-To..E方法，返回转换后的类型和报错信息
\ No newline at end of file
+To..E方法，返回转换后的类型和报错信息
+
+参考 go每日一库：https://github.com/darjun/go-daily-lib
\ No newline at end of file