router := gin.Default()

router.GET("/topic/:topic_id", func(context *gin.Context) {

    context.String(http.StatusOK,"获取帖子Id为%s",context.Param("topic_id"))

})

router.Run()

package main

import (

    "github.com/gin-gonic/gin"

)

type Topic struct {

    TopicID int

}

func main() {

    router := gin.Default()

    router.GET("/topic/:topic_id", func(c *gin.Context) {

        if c.Query("username") == "" {

            c.String(200,"获取帖子列表")

        }else{

            c.String(200,"获取用户名=%s的帖子列表",c.Query("username"))

        }

    })

    router.GET("/v1/topics/:topic_id", func(c *gin.Context) {

        c.String(200,"获取topic=%s的帖子列表",c.Param("topic_id"))

    })

    router.Run()

}