diff --git a/book/README.md b/book/README.md
index 8816ed2..3178fcb 100644
--- a/book/README.md
+++ b/book/README.md
@@ -43,3 +43,99 @@ func setupDatabase() *gorm.DB {
 ### 剥离配置
 
 剥离程序配置，让程序可以通过外部加载配置: config 包:  用来管理程序的配置
+
+定义了程序配置:
+```go
+package config
+
+// 定义程序配置
+// dsn := "root:123456@tcp(127.0.0.1:3306)/test?charset=utf8mb4&parseTime=True&loc=Local"
+// 凡是可以提出出配置的
+
+// 程序的配置对象
+type Config struct {
+	App   `json:"app"`
+	MySQL `json:"mysql"`
+}
+
+// app:
+//
+//	host: 127.0.0.1
+//	port: 8080
+type App struct {
+	Host string `json:"host"`
+	Port int    `json:"port"`
+}
+
+// mysql:
+//
+//	host: 127.0.0.1
+//	port: 3306
+//	database: test
+//	username: "root"
+//	password: "123456"
+//	debug: true
+type MySQL struct {
+	Host     string `json:"host"`
+	Port     int    `json:"port"`
+	Database string `json:"database"`
+	Username string `json:"username"`
+	Password string `json:"password"`
+	Debug    bool   `json:"debug"`
+}
+```
+
+### 配置的加载和读取
+
+```go
+package config
+
+import (
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+// 程序的配置需要有默认值, 给一个最小的可以运行的配置:  本地开发配置就是默认配置
+// "root:123456@tcp(127.0.0.1:3306)/test?charset=utf8mb4&parseTime=True&loc=Local"
+var conf = &Config{
+	App: &App{
+		Host: "127.0.0.1",
+		Port: 8080,
+	},
+	MySQL: &MySQL{
+		Host:     "127.0.0.1",
+		Port:     3306,
+		Database: "test",
+		Username: "root",
+		Password: "123456",
+		Debug:    true,
+	},
+}
+
+func Get() *Config {
+	if conf != nil {
+		panic("配置未初始化")
+	}
+
+	return conf
+}
+
+// 配置的加载
+
+// 程序的其他的部分如何读写程序配置
+// Yaml File --->  Config
+func LoadConfigFromYaml(configFilePath string) error {
+	content, err := os.ReadFile(configFilePath)
+	if err != nil {
+		return err
+	}
+
+	// 默认值 defaultConfig
+	// 结合配置文件 传达进来的 参数
+	// defualt <-- user defile
+	return yaml.Unmarshal(content, conf)
+}
+```
+
+### 编写单元测试，验证模块的正确性
diff --git a/book/config/README.md b/book/config/README.md
new file mode 100644
index 0000000..d69a802
--- /dev/null
+++ b/book/config/README.md
@@ -0,0 +1,79 @@
+# 程序配置管理
+
+
+
+
+## 测试验证包
+
+要考虑测序的是否如预期运行
+
+## 如果定义单元测试
+
+1. 包的命名规范: pkg_test
+我想测试 LoadConfigFromYaml 这个函数能不能正常运行, Go里的每一个Package 都允许有2个包:
++ pkg: 目标包
++ pkg_test: 正对目标包的测试包
+
+2. 定义测试函数: TestLoadConfigFromYaml(t *testing.T)
++ TestXXXX
++ (t *testing.T)
+
+那么你的单元测试定义成功:
+![alt text](image.png)
+
+## 如何查看单测单元的信息
+
+在单元测试里: 是不是被显示
+```go
+t.Log(config.Get())
+```
+
+我Run时, vscode生成的 go test命令
+```sh
+Running tool: /usr/local/go/bin/go test -timeout 300s -run ^TestLoadConfigFromYaml$ gitlab.com/go-course-project/go17/book/config -v -count=1
+```
+
+怎么才能配置vscode 添加go test的 参数, 你需要对的vscode做配置
+![alt text](image-1.png)
+
+修改 TestFlag
+```json
+    "go.testFlags": [
+        "-v",
+        "-count=1"
+    ],
+```
++ -v 就是打印 debug信息， t.Log的信息
++ -count=1: 必须执行一次
+
+## 为你的对象实现Stringger 接口
+
+```go
+// &{0x102317ec0 0x10231c8a0}
+//
+//	String() string, fmt.Strigger接口
+//
+// fmt.
+func (c *Config) String() string {
+	v, _ := json.Marshal(c)
+	return string(v)
+}
+```
+
+```sh
+/Users/yumaojun/Projects/go-course/go17/book/config/load_test.go:17: {"app":{"host":"localhost","port":8090},"mysql":{"host":"127.0.0.1","port":3306,"database":"test","username":"root","password":"888888","debug":false}}
+```
+
+```go
+// Stringer is implemented by any value that has a String method,
+// which defines the “native” format for that value.
+// The String method is used to print values passed as an operand
+// to any format that accepts a string or to an unformatted printer
+// such as Print.
+type Stringer interface {
+	String() string
+}
+```
+
+## debug 测试
+
diff --git a/book/config/application.yaml b/book/config/application.yaml
new file mode 100644
index 0000000..de6ecff
--- /dev/null
+++ b/book/config/application.yaml
@@ -0,0 +1,10 @@
+app:
+    host: localhost
+    port: 8090
+mysql:
+    host: 127.0.0.1
+    port: 3306
+    database: test
+    username: "root"
+    password: "888888"
+    debug: false
diff --git a/book/config/config.go b/book/config/config.go
index 0342c6f..047f859 100644
--- a/book/config/config.go
+++ b/book/config/config.go
@@ -1,13 +1,25 @@
 package config
 
+import "encoding/json"
+
 // 定义程序配置
 // dsn := "root:123456@tcp(127.0.0.1:3306)/test?charset=utf8mb4&parseTime=True&loc=Local"
 // 凡是可以提出出配置的
 
 // 程序的配置对象
 type Config struct {
-	App   `json:"app"`
-	MySQL `json:"mysql"`
+	App   *App   `json:"app"`
+	MySQL *MySQL `json:"mysql"`
+}
+
+// &{0x102317ec0 0x10231c8a0}
+//
+//	String() string, fmt.Strigger接口
+//
+// fmt.
+func (c *Config) String() string {
+	v, _ := json.Marshal(c)
+	return string(v)
 }
 
 // app:
diff --git a/book/config/image-1.png b/book/config/image-1.png
new file mode 100644
index 0000000..c03f833
Binary files /dev/null and b/book/config/image-1.png differ
diff --git a/book/config/image.png b/book/config/image.png
new file mode 100644
index 0000000..0b96506
Binary files /dev/null and b/book/config/image.png differ
diff --git a/book/config/load.go b/book/config/load.go
index 2c022e3..15391b4 100644
--- a/book/config/load.go
+++ b/book/config/load.go
@@ -1,5 +1,48 @@
 package config
 
+import (
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+// 程序的配置需要有默认值, 给一个最小的可以运行的配置:  本地开发配置就是默认配置
+// "root:123456@tcp(127.0.0.1:3306)/test?charset=utf8mb4&parseTime=True&loc=Local"
+var conf = &Config{
+	App: &App{
+		Host: "127.0.0.1",
+		Port: 8080,
+	},
+	MySQL: &MySQL{
+		Host:     "127.0.0.1",
+		Port:     3306,
+		Database: "test",
+		Username: "root",
+		Password: "123456",
+		Debug:    true,
+	},
+}
+
+func Get() *Config {
+	if conf == nil {
+		panic("配置未初始化")
+	}
+
+	return conf
+}
+
 // 配置的加载
 
 // 程序的其他的部分如何读写程序配置
+// Yaml File --->  Config
+func LoadConfigFromYaml(configFilePath string) error {
+	content, err := os.ReadFile(configFilePath)
+	if err != nil {
+		return err
+	}
+
+	// 默认值 defaultConfig
+	// 结合配置文件 传达进来的 参数
+	// defualt <-- user defile
+	return yaml.Unmarshal(content, conf)
+}
diff --git a/book/config/load_test.go b/book/config/load_test.go
new file mode 100644
index 0000000..0cf70bf
--- /dev/null
+++ b/book/config/load_test.go
@@ -0,0 +1,18 @@
+package config_test
+
+import (
+	"testing"
+
+	"gitlab.com/go-course-project/go17/book/config"
+)
+
+// LoadConfigFromYaml
+func TestLoadConfigFromYaml(t *testing.T) {
+	if err := config.LoadConfigFromYaml("application.yaml"); err != nil {
+		// 报错测试失败，并且结束
+		t.Fatal(err)
+	}
+
+	// 加载成功
+	t.Log(config.Get())
+}
diff --git a/book/main.go b/book/main.go
new file mode 100644
index 0000000..2378180
--- /dev/null
+++ b/book/main.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"gitlab.com/go-course-project/go17/book/config"
+)
+
+func main() {
+	// 从配置文件中加载配置
+	// 加载配置
+	path := os.Getenv("CONFIG_PATH")
+	if path == "" {
+		path = "application.yaml"
+	}
+	config.LoadConfigFromYaml(path)
+
+	// 访问加载后的配置
+	conf := config.Get()
+	fmt.Println(conf)
+}
diff --git a/go.mod b/go.mod
index ed3e04d..8cf8cdb 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,7 @@ go 1.22.0
 
 require (
 	github.com/gin-gonic/gin v1.10.0
+	gopkg.in/yaml.v3 v3.0.1
 	gorm.io/driver/mysql v1.5.7
 	gorm.io/gorm v1.25.12
 )
@@ -37,5 +38,4 @@ require (
 	golang.org/x/sys v0.20.0 // indirect
 	golang.org/x/text v0.15.0 // indirect
 	google.golang.org/protobuf v1.34.1 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 )