package main

import (
	"fmt"
	"github.com/gin-gonic/gin"
	"net/http"
)

func getJson(ctx *gin.Context) {
	type user struct {
		Username string `json:"username"`
		Password string `json:"password"`
	}

	jsondata := user{}
	err := ctx.BindJSON(&jsondata)
	if err != nil {
		panic(err)
	}

	ctx.JSON(http.StatusOK, gin.H{
		"username": jsondata.Username,
		"password": jsondata.Password,
	})
}

func main() {
	router := gin.Default()

	router.GET("/JSON", getJson)

	err := router.Run(":8080")
	if err != nil {
		fmt.Println(err)
		return
	}
}

Gin获取json数据