package main

import "github.com/gin-gonic/gin"

type StructA struct {

	FieldA string `form:"field_a"`

}

type StructB struct {

	// 嵌套结构体

	NestedStruct StructA

	FieldB string `form:"field_b"`

}

type StructC struct {

	// 嵌套结构体指针

	NestedStructPointer *StructA

	FieldC string `form:"field_c"`

}

type StructD struct {

	// 嵌套匿名结构体

	NestedAnonymousStruct struct{

		FieldX string `form:"field_x"`

	}

	FieldD string `form:"field_d"`

}

func GetB(c *gin.Context) {

	// 绑定表单数据至自定义结构体

	var b StructB

	c.Bind(&b)

	c.JSON(200, gin.H{"field_a": b.NestedStruct, "field_b": b.FieldB})

}

func GetC(c *gin.Context) {

	var cc StructC

	c.Bind(&cc)

	c.JSON(200, map[string]interface{}{"field_a": cc.NestedStructPointer, "field_c": cc.FieldC})

}

func GetD(c *gin.Context) {

	var d StructD

	c.Bind(&d)

	c.JSON(200, gin.H{"field_x": d.NestedAnonymousStruct, "field_d": d.FieldD})

}

func main() {

	r := gin.Default()

	r.GET("/getb", GetB)

	r.GET("/getc", GetC)

	r.GET("/getd", GetD)

	r.Run()

}