golang 多个struct 转换融合为一个json，平级融合或者多级融合

1. 平级融合，就是下面例子，虽然A在B里面，但是A在struct B里面没有名字，输出结果就是A 和B在同一级的json下面。

package main

import (
	"encoding/json"
	"fmt"
)

type A struct {
	Name        string `json:"name"`
	Description string `json:"description"`
	URL         string `json:"url"`
}

type B struct {
	Name string `json:"name"`
	*A
}

func main() {
	a := A{Name: "test", Description: "desc", URL: "https://example.com"}
	b := B{Name: "new name"}

	b.A = &a

	data, _ := json.Marshal(b)

	fmt.Println(string(data))
}

输出：{"name":"new name","description":"desc","url":"https://example.com"}

2. 两级json，

package main

import (
	"encoding/json"
	"fmt"
)

type A struct {
	Name        string `json:"name"`
	Description string `json:"description"`
	URL         string `json:"url"`
}

type B struct {
	Name string `json:"name"`
	Adata *A
}

func main() {
	a := A{Name: "test", Description: "desc", URL: "https://example.com"}
	b := B{Name: "new name"}

	b.Adata = &a

	data, _ := json.Marshal(b)

	fmt.Println(string(data))
}

输出：{"name":"new name","Adata":{"name":"test","description":"desc","url":"https://example.com"}}