go创建web服务

package main
 
import (
  "fmt"
  "net/http"
)
 
//定义接口处理
func hello(w http.ResponseWriter, r *http.Request) {
  fmt.Fprintln(w, "Hello Goland")
}
func main() {
  //创建/hello端口
  http.HandleFunc("/hello", hello)
  //启动监听服务端口
  http.ListenAndServe(":9090", nil)
 
}

http://localhost:9090/hello

go get -u github.com/gin-gonic/gin

package main
 
import "github.com/gin-gonic/gin"
 
func sayHello(c *gin.Context) {
  c.JSONP(200, gin.H{
    "message": "hello goland!",
  })
}
func main() {
  //返回默认的路由引擎
  r := gin.Default()
  //指定访问类型和地址
  r.GET("/hello", sayHello)
 
  r.Run(":8080")
}

http://localhost:8080/hello