前提新建数据库test，新建脚本
DROP TABLE IF EXISTS `userinfo`;
CREATE TABLE `userinfo` (
`autid` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(255) DEFAULT NULL,
`departname` varchar(255) DEFAULT NULL,
`password` varchar(255) DEFAULT NULL,
`uid` varchar(255) DEFAULT NULL,
`created` varchar(255) DEFAULT NULL,
PRIMARY KEY (`autid`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
新建工程项目Test-demo
在src下面新建文件mysql.go
下载驱动
前提是配置好GOPATH，在cmd执行
go get github.com/go-sql-driver/mysql
引入包
import (
"crypto/md5" //md5加解密
"database/sql" //数据库操作
"encoding/hex" //转码
"fmt" //输出
"strconv" //格式化
"time" //时间
_ "github.com/go-sql-driver/mysql" //mysql驱动
)
新建数据库连接
driver的格式为
user:password@tcp(localhost:5555)/dbname?charset=utf8
const (
db_driver = "root:r123456@tcp(127.0.0.1:3306)/test?charset=utf8"
)
func OpenDB() (success bool, db *sql.DB) {
var isOpen bool
db, err := sql.Open("mysql", db_driver)
if err != nil {
isOpen = false
} else {
isOpen = true
}
checkErr(err)
return isOpen, db
}
操作数据库
新增
func insertToDB(db *sql.DB) {
uid := GetNowtimeMD5()
nowTimeStr := GetTime()
stmt, err := db.Prepare("insert userinfo set username=?,departname=?,created=?,password=?,uid=?")
checkErr(err)
res, err := stmt.Exec("zhang", "研发中心", nowTimeStr, "123456", uid)
checkErr(err)
id, err := res.LastInsertId()
checkErr(err)
if err != nil {
fmt.Println("插入数据失败")
} else {
fmt.Println("插入数据成功：", id)
}
}
查询
func QueryFromDB(db *sql.DB) {
rows, err := db.Query("SELECT * FROM userinfo")
checkErr(err)
if err != nil {
fmt.Println("error:", err)
} else {
}
for rows.Next() {
var uid string
var username string
var departmentname string
var created string
var password string
var autid string
checkErr(err)
err = rows.Scan(&uid, &username, &departmentname, &created, &password, &autid)
fmt.Println(autid)
fmt.Println(username)
fmt.Println(departmentname)
fmt.Println(created)
fmt.Println(password)
fmt.Println(uid)
}
}
修改
func UpdateDB(db *sql.DB, uid string) {
stmt, err := db.Prepare("update userinfo set username=? where uid=?")
checkErr(err)
res, err := stmt.Exec("zhangqi", uid)
affect, err := res.RowsAffected()
fmt.Println("更新数据：", affect)
checkErr(err)
}
删除
func DeleteFromDB(db *sql.DB, autid int) {
stmt, err := db.Prepare("delete from userinfo where autid=?")
checkErr(err)
res, err := stmt.Exec(autid)
affect, err := res.RowsAffected()
fmt.Println("删除数据：", affect)
}
其它定义方法
func GetTime() string {
const shortForm = "2006-01-02 15:04:05"
t := time.Now()
temp := time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), time.Local)
str := temp.Format(shortForm)
fmt.Println(t)
return str
}
func GetMD5Hash(text string) string {
haser := md5.New()
haser.Write([]byte(text))
return hex.EncodeToString(haser.Sum(nil))
}
func GetNowtimeMD5() string {
t := time.Now()
timestamp := strconv.FormatInt(t.UTC().UnixNano(), 10)
return GetMD5Hash(timestamp)
}
func checkErr(errMasg error) {
if errMasg != nil {
panic(errMasg)
}
}
调用
func main() {
opend, db := OpenDB()
if opend {
fmt.Println("open success")
} else {
fmt.Println("open faile:")
}
//DeleteFromDB(db, 10)
//DeleteFromDB(db, 1)
//UpdateDB(db, 5)
insertToDB(db)
QueryFromDB(db)
//UpdateUID(db, 5)
//UpdateTime(db, 4)
db.Close()
}
输出结果
完整代码
package main
import (
"crypto/md5"
"database/sql"
"encoding/hex"
"fmt"
"strconv"
"time"
_ "github.com/go-sql-driver/mysql"
)
const (
db_driver = "root:r123456@tcp(127.0.0.1:3306)/test?charset=utf8"
)
func main() {
opend, db := OpenDB()
if opend {
fmt.Println("open success")
} else {
fmt.Println("open faile:")
}
//DeleteFromDB(db, 10)
//DeleteFromDB(db, 1)
//UpdateDB(db, 5)
insertToDB(db)
QueryFromDB(db)
//UpdateUID(db, 5)
//UpdateTime(db, 4)
db.Close()
}
func OpenDB() (success bool, db *sql.DB) {
var isOpen bool
db, err := sql.Open("mysql", db_driver)
if err != nil {
isOpen = false
} else {
isOpen = true
}
checkErr(err)
return isOpen, db
}
func insertToDB(db *sql.DB) {
uid := GetNowtimeMD5()
nowTimeStr := GetTime()
stmt, err := db.Prepare("insert userinfo set username=?,departname=?,created=?,password=?,uid=?")
checkErr(err)
res, err := stmt.Exec("zhang", "研发中心", nowTimeStr, "123456", uid)
checkErr(err)
id, err := res.LastInsertId()
checkErr(err)
if err != nil {
fmt.Println("插入数据失败")
} else {
fmt.Println("插入数据成功：", id)
}
}
func QueryFromDB(db *sql.DB) {
rows, err := db.Query("SELECT * FROM userinfo")
checkErr(err)
if err != nil {
fmt.Println("error:", err)
} else {
}
for rows.Next() {
var uid string
var username string
var departmentname string
var created string
var password string
var autid string
checkErr(err)
err = rows.Scan(&uid, &username, &departmentname, &created, &password, &autid)
fmt.Println(autid)
fmt.Println(username)
fmt.Println(departmentname)
fmt.Println(created)
fmt.Println(password)
fmt.Println(uid)
}
}
func UpdateDB(db *sql.DB, uid string) {
stmt, err := db.Prepare("update userinfo set username=? where uid=?")
checkErr(err)
res, err := stmt.Exec("zhangqi", uid)
affect, err := res.RowsAffected()
fmt.Println("更新数据：", affect)
checkErr(err)
}
func DeleteFromDB(db *sql.DB, autid int) {
stmt, err := db.Prepare("delete from userinfo where autid=?")
checkErr(err)
res, err := stmt.Exec(autid)
affect, err := res.RowsAffected()
fmt.Println("删除数据：", affect)
}
func GetTime() string {
const shortForm = "2006-01-02 15:04:05"
t := time.Now()
temp := time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), time.Local)
str := temp.Format(shortForm)
fmt.Println(t)
return str
}
func GetMD5Hash(text string) string {
haser := md5.New()
haser.Write([]byte(text))
return hex.EncodeToString(haser.Sum(nil))
}
func GetNowtimeMD5() string {
t := time.Now()
timestamp := strconv.FormatInt(t.UTC().UnixNano(), 10)
return GetMD5Hash(timestamp)
}
func checkErr(errMasg error) {
if errMasg != nil {
panic(errMasg)
}
}
