Golang http.PostParam未在响应中显示所有Cookie

package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
	"net/url"
	"strings"
)

func main() {
	// 构造POST请求的参数
	params := url.Values{}
	params.Set("key1", "value1")
	params.Set("key2", "value2")

	// 发送POST请求
	resp, err := http.Post("http://example.com", "application/x-www-form-urlencoded", strings.NewReader(params.Encode()))
	if err != nil {
		fmt.Println("POST请求发送失败:", err)
		return
	}
	defer resp.Body.Close()

	// 读取响应内容
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println("读取响应内容失败:", err)
		return
	}

	// 解析响应头，获取Cookie信息
	cookies := resp.Cookies()
	for _, cookie := range cookies {
		fmt.Println("Cookie:", cookie.Name, "=", cookie.Value)
	}

	// 打印响应内容
	fmt.Println("响应内容:", string(body))
}