如何在Golang中实现简单的JSON格式校验_Golang JSON格式校验项目实战汇总

type UserRequest struct {
    Name     string  `json:"name"`
    Email    string  `json:"email"`
    Age      int     `json:"age"`
    IsActive bool    `json:"is_active"`
}

var req UserRequest
err := json.Unmarshal([]byte(jsonStr), &req)
if err != nil {
    log.Fatal("JSON格式错误:", err)
}

go get github.com/go-playground/validator/v10

import "github.com/go-playground/validator/v10"

type UserRequest struct {
    Name     string `json:"name" validate:"required,min=2,max=50"`
    Email    string `json:"email" validate:"required,email"`
    Age      int    `json:"age" validate:"gte=0,lte=150"`
    IsActive bool   `json:"is_active"`
}

var req UserRequest
if err := json.Unmarshal([]byte(jsonStr), &req); err != nil {
    log.Fatal("JSON解析失败:", err)
}

validate := validator.New()
if err := validate.Struct(req); err != nil {
    for _, e := range err.(validator.ValidationErrors) {
        log.Printf("字段 %s 错误: %s", e.Field(), e.Tag())
    }
    return
}

type UserRequest struct {
    Name  string `json:"name" validate:"required"`
    Role  string `json:"role" validate:"oneof=admin user"`
}

validate.RegisterValidation("notadmin", func(fl validator.FieldLevel) bool {
    return fl.Field().String() != "admin"
})