golang 匿名字段解析和序列化问题

golang 匿名字段解析和序列化问题

说明：

golang中包含匿名字段的结构体在解析和序列化(json.Unmarshal和json.Marshal)的时候：

如果对匿名字段指定了解析说明`json:""`，就会变成带层级的字符数组。

如果没指定解析说明，则会平铺。

例子：

匿名字段不加解析说明`json""`，就是和平铺的字符串相互转化 

和平铺的字符串互相转化成功：

package mainimport ("encoding/json""fmt"
)func main()  {initStr := []byte(`{"father_str":"i am father","son_int":3,"son_str":"i am son"}`)father := &Father{}err := json.Unmarshal(initStr, father)if err != nil {fmt.Println(err)return}fmt.Println(father)newStr, err := json.Marshal(father)if err != nil {fmt.Println(err)return}fmt.Println(string(newStr))
}type Father struct {SonFatherStr	string `json:"Father_str"`
}type Son struct {SonStr	string 		`json:"son_str"`SonStrInt	int		`json:"son_int"`
}

&{{i am son 3} i am father}
{"son_str":"i am son","son_int":3,"Father_str":"i am father"}

带层级的字符串转化失败

package mainimport ("encoding/json""fmt"
)func main()  {//initStr := []byte(`{"father_str":"i am father","son_int":3,"son_str":"i am son"}`)initStr := []byte(`{"son":{"son_int":3,"son_str":"i am son"},"father_str":"i am father"}`)father := &Father{}err := json.Unmarshal(initStr, father)if err != nil {fmt.Println(err)return}fmt.Println(father)newStr, err := json.Marshal(father)if err != nil {fmt.Println(err)return}fmt.Println(string(newStr))
}type Father struct {SonFatherStr	string `json:"Father_str"`
}type Son struct {SonStr	string 		`json:"son_str"`SonStrInt	int		`json:"son_int"`
}

&{{ 0} i am father}
{"son_str":"","son_int":0,"Father_str":"i am father"}

二、匿名字段加解析说明`json""`，就必须和带层级的字符串相互转化 

平铺的字符串转化失败

package mainimport ("encoding/json""fmt"
)func main()  {initStr := []byte(`{"father_str":"i am father","son_int":3,"son_str":"i am son"}`)father := &Father{}err := json.Unmarshal(initStr, father)if err != nil {fmt.Println(err)return}fmt.Println(father)newStr, err := json.Marshal(father)if err != nil {fmt.Println(err)return}fmt.Println(string(newStr))
}type Father struct {Son	`json:"son"`FatherStr	string `json:"Father_str"`
}type Son struct {SonStr	string 		`json:"son_str"`SonStrInt	int		`json:"son_int"`
}

&{{ 0} i am father}
{"son":{"son_str":"","son_int":0},"Father_str":"i am father"}

 和带层级的结构体互相转化成功

package mainimport ("encoding/json""fmt"
)func main()  {initStr := []byte(`{"son":{"son_int":3,"son_str":"i am son"},"father_str":"i am father"}`)father := &Father{}err := json.Unmarshal(initStr, father)if err != nil {fmt.Println(err)return}fmt.Println(father)newStr, err := json.Marshal(father)if err != nil {fmt.Println(err)return}fmt.Println(string(newStr))
}type Father struct {Son	`json:"son"`FatherStr	string `json:"Father_str"`
}type Son struct {SonStr	string 		`json:"son_str"`SonStrInt	int		`json:"son_int"`
}

&{{i am son 3} i am father}
{"son":{"son_str":"i am son","son_int":3},"Father_str":"i am father"}