Go 언어의 프로그래밍 기능과 응용 시나리오에 대한 심층 토론

package main

import (
    "fmt"
    "time"
)

func main() {
    for i := 0; i < 5; i++ {
        go func(num int) {
            fmt.Println("goroutine", num, "start")
            time.Sleep(time.Second)
            fmt.Println("goroutine", num, "end")
        }(i)
    }

    time.Sleep(2 * time.Second) // 等待所有goroutine执行完毕
    fmt.Println("Main Goroutine End")
}

package main

import (
    "fmt"
    "net/http"
)

func helloHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, World!")
}

func main() {
    http.HandleFunc("/hello", helloHandler)
    http.ListenAndServe(":8080", nil)
}

package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

func main() {
    data := []byte(`{"name":"Alice","age":25}`)
    var person Person
    if err := json.Unmarshal(data, &person); err != nil {
        fmt.Println("JSON Unmarshal Error:", err)
    }
    fmt.Println("Name:", person.Name)
    fmt.Println("Age:", person.Age)
}