func httpGet() {
    resp, err := http.Get("http://www.01happy.com/demo/accept.php?id=1")
    if err != nil {
        // handle error
    }
 
    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        // handle error
    }
 
    fmt.Println(string(body))
}

func httpPost() {
    resp, err := http.Post("http://www.01happy.com/demo/accept.php",
        "application/x-www-form-urlencoded",
        strings.NewReader("name=cjb"))
    if err != nil {
        fmt.Println(err)
    }
 
    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        // handle error
    }
 
    fmt.Println(string(body))
}

书写客户端
package main

import (
	"fmt"
	"net/http"
	"net/url"
)

func main() {
	//这里添加post的body内容
	data := make(url.Values)
	data["key"] = []string{"this is key"}
	data["value"] = []string{"this is value"}

	//把post表单发送给目标服务器
	res, err := http.PostForm("http://127.0.0.1/postpage", data)
	if err != nil {
		fmt.Println(err.Error())
		return
	}
	defer res.Body.Close()

	fmt.Println("post send success")
}

func httpPostForm() {
    resp, err := http.PostForm("http://www.01happy.com/demo/accept.php",
        url.Values{"key": {"Value"}, "id": {"123"}})
 
    if err != nil {
        // handle error
    }
 
    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        // handle error
    }
 
    fmt.Println(string(body))
 
}