Golang：发起http请求-GET带参数、POST发送Form和JSON数据

package main
 
import (
    "bytes"
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
    "net/url"
)
 
func main() {
    // GET请求带参数
    getURL, _ := url.Parse("http://example.com/api")
    getQuery := getURL.Query()
    getQuery.Add("key1", "value1")
    getQuery.Add("key2", "value2")
    getURL.RawQuery = getQuery.Encode()
    getResponse, err := http.Get(getURL.String())
    if err != nil {
        panic(err)
    }
    defer getResponse.Body.Close()
    getBody, err := ioutil.ReadAll(getResponse.Body)
    if err != nil {
        panic(err)
    }
    fmt.Println("GET Response:", string(getBody))
 
    // POST请求，发送Form数据
    postFormURL := "http://example.com/api"
    postFormData := url.Values{}
    postFormData.Add("key1", "value1")
    postFormData.Add("key2", "value2")
    postFormBody := bytes.NewBufferString(postFormData.Encode())
    postFormResponse, err := http.Post(postFormURL, "application/x-www-form-urlencoded", postFormBody)
    if err != nil {
        panic(err)
    }
    defer postFormResponse.Body.Close()
    postFormBodyContent, err := ioutil.ReadAll(postFormResponse.Body)
    if err != nil {
        panic(err)
    }
    fmt.Println("POST Form Response:", string(postFormBodyContent))
 
    // POST请求，发送JSON数据
    postJSONURL := "http://example.com/api"
    postJSONData := map[string]string{
        "key1": "value1",
        "key2": "value2",
    }
    postJSONBuffer := new(bytes.Buffer)
    json.NewEncoder(postJSONBuffer).Encode(postJSONData)
    postJSONResponse, err := http.Post(postJSONURL, "application/json", postJSONBuffer)
    if err != nil {
        panic(err)
    }
    defer postJSONResponse.Body.Close()
    postJSONBodyContent, err := ioutil.ReadAll(postJSONResponse.Body)
    if err != nil {
        panic(err)
    }
    fmt.Println("POST JSON Response:", string(postJSONBodyContent))
}

这段代码展示了如何在Go中发起GET请求，带参数；如何发起POST请求，发送application/x-www-form-urlencoded和application/json格式的数据。代码使用了标准库中的http包和url包，并对响应体内容进行了读取和打印。