62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package main
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import (
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"time"
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)
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// User 结构体，用于返回 JSON 数据
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type User struct {
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ID int `json:"id"`
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Name string `json:"name"`
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}
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// 根路径处理器
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func homeHandler(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintf(w, "Hello, World! 👋")
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}
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// /time 路径处理器，返回当前服务器时间
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func timeHandler(w http.ResponseWriter, r *http.Request) {
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currentTime := time.Now().Format("2006-01-02 15:04:05")
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fmt.Fprintf(w, "当前服务器时间: %s", currentTime)
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}
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// /api/user 路径处理器，返回 JSON 数据
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func userHandler(w http.ResponseWriter, r *http.Request) {
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user := User{
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ID: 1,
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Name: "张三",
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}
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(user)
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}
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// 带请求参数处理的处理器
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func helloHandler(w http.ResponseWriter, r *http.Request) {
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name := r.URL.Query().Get("name")
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if name == "" {
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name = "World"
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}
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fmt.Fprintf(w, "Hello, %s!", name)
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}
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func main() {
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// 注册路由
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mux := http.NewServeMux()
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mux.HandleFunc("/", homeHandler)
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mux.HandleFunc("/time", timeHandler)
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mux.HandleFunc("/api/user", userHandler)
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mux.HandleFunc("/hello", helloHandler)
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// 启动 HTTP 服务
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addr := ":8080"
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log.Printf("启动 HTTP 服务，监听端口 %s\n", addr)
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if err := http.ListenAndServe(addr, mux); err != nil {
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log.Fatalf("服务器启动失败: %v", err)
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}
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}
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