os: wsl ubuntu18.04
mysql
sudo apt-get install mysql-server
首先需要改變MySQL的配置,執行sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf
將找到 bind-address = 127.0.0.1 並註釋掉 → # bind-address = 127.0.0.1 (如下圖)
service mysql restart
mysql
create database go_db;
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';
go
1、開啓GO111MODULE並修改Go代理(用下面兩個命令把下圖中標出的兩個地方修改成跟我一樣的配置)
go env -w GO111MODULE=on
go env -w GOPROXY=https://goproxy.cn,direct(修改這個是因爲原有的谷歌代理在國內不行)
2、安裝Gin(在GoLand工具命令行下執行以下命令)
go get -u github.com/gin-gonic/gin
【注意:這一步執行完後,它會自動在go.mod文件中引入響應的依賴】
3、安裝Gorm
go get -u gorm.io/gorm
4、安裝mysql數據庫驅動
go get -u gorm.io/driver/mysql
main.go
package main
import (
"fmt"
"log"
"math/rand"
"net/http"
"time"
"github.com/gin-gonic/gin"
"gorm.io/driver/mysql"
"gorm.io/gorm"
)
type User struct {
gorm.Model
//'gorm:"type:varchar(20);not null"'
Name string
Phone string
Password string
}
func main() {
db := InitDB()
//傳統的Web服務寫法
//http.HandleFunc("/hello", sayHello)
//err := http.ListenAndServe(":9090", nil)
//if err != nil {
// fmt.Printf("http server faile,err:%v\n", err)
// return
//}
//fmt.Println("項目啓動成功")
//利用Gin框架的web寫法,來源於gin官網
r := gin.Default()
r.POST("/api/auth/register", func(c *gin.Context) {
//獲取參數
name := c.PostForm("name")
phone := c.PostForm("phone")
password := c.PostForm("password")
//數據驗證
if len(phone) != 11 {
c.JSON(http.StatusUnprocessableEntity, gin.H{"code": 422, "msg": "手機號格式不正確"})
return
}
if len(password) < 6 {
c.JSON(http.StatusUnprocessableEntity, gin.H{"code": 422, "msg": "密碼不能少於6位"})
return
}
if len(name) == 0 {
name = RandomString(10)
return
}
log.Print(name, phone, password)
//判斷手機號是否存在
if isPhoneExist(db, phone) {
c.JSON(http.StatusUnprocessableEntity, gin.H{"code": 422, "msg": "用戶已存在,不能註冊"})
return
}
//創建新用戶 //第一步把傳過來的數據變成類
newUser := User{
Name: name,
Phone: phone,
Password: password,
}
db.Create(&newUser) // 交給gnorm來運行.
//返回結果
c.JSON(200, gin.H{
"message": "註冊成功",
})
})
_ = r.Run() // listen and serve on 0.0.0.0:8080
panic(r.Run())
}
func isPhoneExist(db *gorm.DB, phone string) bool {
var user User
db.Where("phone = ?", phone).First(&user)
if user.ID != 0 {
return true
}
return false
}
// 隨機產生英文字符,可設定長度
func RandomString(n int) string {
var letters = []byte("asdfghjklzxcvbnmqwertyuiopASDFGHJKLZXCVBNMQWERTYUIOP")
result := make([]byte, n)
rand.Seed(time.Now().Unix())
for i := range result {
result[i] = letters[rand.Intn(len(letters))]
}
return string(result)
}
func InitDB() *gorm.DB { //前提是你要先在本機用Navicat創建一個名爲go_db的數據庫
host := "localhost"
port := "3306"
database := "go_db"
username := "root"
password := "123456"
charset := "utf8"
dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=%s&parseTime=true",
username,
password,
host,
port,
database,
charset) //這裏 gorm.Open()函數與之前版本的不一樣,大家注意查看官方最新gorm版本的用法
db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
if err != nil {
panic("Error to Db connection, err: " + err.Error())
}
//這個是gorm自動創建數據表的函數。它會自動在數據庫中創建一個名爲users的數據表
_ = db.AutoMigrate(&User{}) //這個地方也非常方便, 直接給類即可.
return db
}