Go语言的Http包及冒泡排序解读

Http

一.Get

        package mainimport ("fmt""io/ioutil""net/http")func main() {response, err := http.Get("http://www.baidu.com")if err != nil {fmt.Println("Http Get request failed:", err)return}defer response.Body.Close()body, err := ioutil.ReadAll(response.Body)if err != nil {fmt.Println("Failed to read response body:", err)return}fmt.Println(string(body))}

二、Post

        package mainimport ("fmt""io/ioutil""net/http""strings")func main() {url := "http://example.com"payload := strings.NewReader("key1=value1&key2=value2")req, err := http.NewRequest("POST", url, payload)if err != nil {fmt.Println("Failed to create POST request:", err)return}req.Header.Set("Content-Type", "application/x-www-form-urlencoded")client := &http.Client{}resp, err := client.Do(req)if err != nil {fmt.Println("HTTP POST request failed:", err)return}defer resp.Body.Close()body, err := ioutil.ReadAll(resp.Body)if err != nil {fmt.Println("Failed to read response body:", err)return}fmt.Println(string(body))}

三、Http服务器

		package mainimport ("fmt""net/http")func main() {http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {fmt.Fprintf(w, "Hello, World!")})err := http.ListenAndServe(":8080", nil)if err != nil {fmt.Println("Failed to start HTTP server:", err)}}// 终端输入命令 go run main.go   当看见fmt中的内容意味着8080端口被占用// 在服务器成功启动后，你可以在浏览器中访问http://localhost:8080，应该会看到"Hello, World!"的输出。当你在浏览器中刷新页面时，服务器会再次响应相同的消息。要停止服务器，你可以在终端中按下Ctrl+C来中断运行。

BubbleSort冒泡排序

    package mainimport ("fmt")func BubbleSort(arr *[5]int) {fmt.Println("使用冒泡排序前arr=", (*arr))temp := 0 // 用于在排序过程中进行值的交换for i := 0; i < len(*arr)-1; i++ { //  i = 0, 1, 2, 3for j := 0; j < len(*arr)-1-i; j++ {if (*arr)[j] > (*arr)[j+1] { // 判断当前 是否与下一个值小temp = (*arr)[j]        // 小则temp记录当前数值(*arr)[j] = (*arr)[j+1] // 覆盖当前数值(*arr)[j+1] = temp      // 替换数值}}}}func main() {arr := [5]int{22, 55, 28, 77, 11}BubbleSort(&arr)fmt.Println("使用冒泡排序后arr=", arr)}// 使用冒泡排序前arr= [22 55 28 77 11]// 使用冒泡排序后arr= [11 22 28 55 77]