golang gin ShouldBind的介绍和使用示例详解

package main
import (
    "github.com/gin-gonic/gin"
    "net/http"
)
// 定义一个结构体用于绑定请求数据
type User struct {
    Name  string `json:"name" binding:"required"`
    Email string `json:"email" binding:"required,email"`
}
func main() {
    router := gin.Default()
    router.POST("/user", func(c *gin.Context) {
        var user User
        // 使用 ShouldBind 绑定请求数据
        if err := c.ShouldBindJSON(&user); err != nil {
            // 如果绑定失败，返回错误信息
            c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
            return
        }
        // 绑定成功，返回成功响应
        c.JSON(http.StatusOK, gin.H{"message": "用户创建成功", "user": user})
    })
    // 启动服务器
    router.Run(":8080")
}

{
    "name": "John Doe",
    "email": "john@example.com"
}

{
    "message": "用户创建成功",
    "user": {
        "name": "John Doe",
        "email": "john@example.com"
    }
}

package main
import (
    "github.com/gin-gonic/gin"
    "net/http"
)
type User struct {
    ID    string `uri:"id" binding:"required"`
    Name  string `json:"name" binding:"required"`
    Email string `json:"email" binding:"required,email"`
}
func main() {
    router := gin.Default()
    // 绑定 URI
    router.GET("/user/:id", func(c *gin.Context) {
        var user User
        if err := c.ShouldBindUri(&user); err != nil {
            c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
            return
        }
        c.JSON(http.StatusOK, gin.H{"user_id": user.ID})
    })
    // 绑定 JSON
    router.POST("/user", func(c *gin.Context) {
        var user User
        if err := c.ShouldBindJSON(&user); err != nil {
            c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
            return
        }
        c.JSON(http.StatusOK, gin.H{"message": "用户创建成功", "user": user})
    })
    // 绑定查询参数
    router.GET("/users", func(c *gin.Context) {
        var user User
        if err := c.ShouldBindQuery(&user); err != nil {
            c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
            return
        }
        c.JSON(http.StatusOK, gin.H{"message": "获取用户成功", "user": user})
    })
    router.Run(":8080")
}