gin的控制器：

type ExampleService struct {
    UserName String
    Password   String
}


func (example *ExampleService) LoginCheck(c *gin.Context) bool {
    c.Bind(&example)
    ............
}

前端应该写：

this.axios.post("login.html",  {
    UserName: this.username,  //这里对应struct的成员名
    Password: this.password

})

还有一种更轻量灵活的写法:

func LoginCheck(c *gin.Context) bool {
    var param struct {
        Username string `json:"username" binding:"required"`
        Password string  `json:"password" binding:"required"`
    }
    c.Bind(&param)
    ............................

前端照旧

划重点: 结构体成员变量名首字母必须大写!!!

补充:

当绑定的成员为int或者int32,int64类型时,前端如果传入的值为0,会报如下错误:

[GIN-debug] [WARNING] Headers were already written. Wanted to override status code 400 with 200

且前端会报错误:Failed to load resource: the server responded with a status of 400 (Bad Request)

导致不正常.

解决办法1: 避免设计0值;

解决办法2: 去掉以下结构体的 binding:"required"