package main
import (
"database/sql"
"fmt"
"log"
"net/http"
"reflect"
"strings"
_ "github.com/go-sql-driver/mysql"
)
func sayhelloName(w http.ResponseWriter, r *http.Request) {
r.ParseForm() //Parse parameters, the default is not parsed
fmt.Println(r.Form) //These information are the print information output to the server
fmt.Println("path", r.URL.Path)
fmt.Println("scheme", r.URL.Scheme)
fmt.Println(r.Form["url_long"])
fmt.Println("type:", reflect.TypeOf(r))
printData(r)
fmt.Fprintf(w, "Hello astaxie!") //This write to w is output to the client
was pretty int
ret = max(1, 2)
fmt.Printf("Maximum value is: %d\n", ret)
dbFun()
}
func main() {
http.HandleFunc("/hello", sayhelloName) //Set the route for access
err := http.ListenAndServe(":9091", nil) //Set the listening port
if err != nil {
log.Fatal("ListenAndServe: ", err)
}
}
func max(num1, num2 int) int {
/* define local variables */
var result int
if num1 > num2 {
result = num1
} else {
result = num2
}
return result
}
func printData(a *http.Request) {
// fmt.Println("num", a)
for k, v := range a.Form {
fmt.Println("key:", k)
fmt.Println("val:", strings.Join(v, ""))
}
}
func dbFun () {
fmt.Println("===database===")
//Initialize database information, this time is a database connection pool
db, err := sql.Open("mysql", "root:root@tcp(127.0.0.1:3306)/test?charset=utf8")
IsErr(err)
//Encapsulate SQL instructions
stmt, err := db.Prepare("INSERT hello SET name=?,age=?")
IsErr(err)
//Execute the affecting instruction
result, err := stmt.Exec("jhon", "18")
IsErr(err)
fmt.Print(result.RowsAffected())
}
func IsErr(err error) {
if err != nil {
fmt.Println("Cheng Han error: %s", err)
}
}
Then the browser accesses http://localhost:9091/hello, and the data can be inserted.
refer to:
https://studygolang.com/articles/5269
https://www.cnblogs.com/zhja/p/5604553.html