package mainimport ("fmt""io""log""net/http"
)func main() {http.HandleFunc("/test", doRequest)      //   设置访问路由err := http.ListenAndServe(":8000", nil) //设置监听的端口if err != nil {log.Fatal("ListenAndServe: ", err)}
}func doRequest(w http.ResponseWriter, r *http.Request) {r.ParseForm()       //解析url传递的参数，对于POST则解析响应包的主体（request body）//fmt.Println(r.Form) //这些信息是输出到服务器端的打印信息//fmt.Println("path", r.URL.Path)//fmt.Println("scheme", r.URL.Scheme)//for k, v := range r.Form {//    fmt.Println("key:", k)//    fmt.Println("value:", strings.Join(v, ""))//}fmt.Fprintf(w, "service start...") //这个写入到w的是输出到客户端的 也可以用下面的 io.WriteString对象//注意:如果没有调用ParseForm方法，下面无法获取表单的数据//query := r.URL.Query()var uid string // 初始化定义变量if r.Method == "GET" {uid = r.FormValue("uid")} else if r.Method == "POST" {uid = r.PostFormValue("uid")}io.WriteString(w, "uid = "+uid)
}

func main() {mux := http.NewServeMux()mux.HandleFunc("/test", doRequest)err :=  http.ListenAndServe(":8000", mux) //设置监听的端口if err != nil {log.Fatal("ListenAndServe: ", err)}
}

package mainimport ("fmt""io""log""net/http"
)var mux map[string]func(http.ResponseWriter, *http.Request)func main() {server := http.Server{Addr:    ":8000",Handler: &doHandler{},}mux = make(map[string]func(http.ResponseWriter, *http.Request))mux["/test"] = doRequesterr := server.ListenAndServe()if err != nil {log.Fatal("ListenAndServe: ", err)}
}type doHandler struct{}func (*doHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {if res, ok := mux[r.URL.String()]; ok {res(w, r)return}io.WriteString(w, "url params: "+r.URL.String())
}
func doRequest(w http.ResponseWriter, r *http.Request) {r.ParseForm()                      //解析url传递的参数，对于POST则解析响应包的主体（request body）fmt.Fprintf(w, "service start...") //这个写入到w的是输出到客户端的 也可以用下面的 io.WriteString对象
}