数据绑定的目的是前端提交过来的数据和后台数据进行映射

/*
@Author :   寒云
@Email  :   1355081829@qq.com
@Time : 2019/10/15 11:51
*/
package main

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

type User struct {
    Name     string `form:"user" binding:"required"`
    Password string `form:"password" binding:"required"`
}

func main() {
    r := gin.Default()
    r.POST("/login", func(c *gin.Context) {
        var user User
        _ = c.ShouldBind(&user)
        name := c.PostForm("name")
        age := c.PostForm("age")
        realAge, _ := strconv.Atoi(age)
        c.JSON(http.StatusOK, gin.H{"user": user, "name": name, "age": realAge})
    })

    _ = r.Run(":8089")
}

在这个例子中，我们定义了个名字为User的机构体,

type User struct {
    Name     string `form:"user" binding:"required"`
    Password string `form:"password" binding:"required"`
}

通过 ShouldBind将前台数据和我们的结构体进行了数据绑定

      _ = c.ShouldBind(&user)

用postman模拟接口请求，我们成功的将前台请求的数据和我们定义的结构体绑定

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