Solution to null JSON after serialization in golang

type animal struct {
    
	name string
	age int
}

func main(){
    
	ani := animal{
    
		name: "lcq",
		age:  23,
	}
	marshal, err := json.Marshal(ani)
	if err != nil {
    
		fmt.Println("err:", err)
		return
	}
	fmt.Println(string(marshal))
}

The serialized result is ：

{
    }

The main reason is that the attribute is lowercase , External packages cannot be accessed , Just change the field name to uppercase .

type animal struct {
    
	Name string
	Age int
}

func main(){
    
	ani := animal{
    
		Name: "lcq",
		Age:  23,
	}
	marshal, err := json.Marshal(ani)
	if err != nil {
    
		fmt.Println("err:", err)
		return
	}
	fmt.Println(string(marshal))
}