準備工作：創建數據庫

Go語言連接mysql

安裝包

go get "gethub.com/go-sql-driver/mysql" go get "gethub.com/jmoiron/sqlx"

Exec增刪改

//連接數據庫信息 var (userName string = "root"passWord string = "123456"idAddress string = "127.0.0.1"port string = "3306"dbName string = "go_text"charset string = "utf8" )// 連接數據庫這里用*來保證連接的是同一個對象 //root:123456@tcp(127.0.0.1:3306)/go_text?charset=utf8 func connectMySQL() *sqlx.DB {dbstr := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=%s", userName, passWord, idAddress, port, dbName, charset)DB, err := sqlx.Open("mysql", dbstr)fmt.Println(err)ping(DB)return DB} func ping(DB *sqlx.DB) {err := DB.Ping()if err != nil {fmt.Println("ping failed")} else {fmt.Println("ping success")} } func textExec(mysqlDB *sqlx.DB) {//Exec 指行sql語句insertSQL := "insert into user(userid,username,password,avatar,create_time,update_time)values(?,?,?,?,?,?)"result, err := mysqlDB.Exec(insertSQL, 10000, "周南", "123456", "ks.png", "2022-11-11 11:11:11", "2022-11-11 11:11:11")if err != nil {fmt.Println("數據插入失敗", err)return}id, _ := result.LastInsertId()fmt.Println(id)//修改updateSQL := "update user set username='打阿偉'where id =1"result2, err := mysqlDB.Exec(updateSQL)rowNum, _ := result2.RowsAffected() //受到印象的行數fmt.Println("更新成功，affected rows", rowNum)//刪除deleteSQL := "delete from user where id =2"result3, err := mysqlDB.Exec(deleteSQL)rowNum1, _ := result3.RowsAffected() //受到印象的行數fmt.Println("刪除成功，affected rows", rowNum1) }

查詢

Query查詢

unc textQuery(mysqlDB *sqlx.DB) {querySql := "select *from user"rows, err := mysqlDB.Query(querySql)if err != nil {fmt.Println("數據查詢失敗", err)return}fmt.Println(rows)//返回一個結果集rows//next來獲取結果//要關閉結果集for rows.Next() {var id, userid intvar username, password, avatar, create_time, update_time stringrows.Scan(&id, &userid, &username, &password, &avatar, &create_time, &update_time)fmt.Println(id, userid, username, password, avatar, create_time, update_time)}rows.Close() }

Get和Select查詢

mysqlDB := connectMySQL()defer mysqlDB.Close()type user struct {Id int `db:"id"`UserId int `db:"userid"`UserName string `db:"username"`Password string `db:"password"`Avatar string `db:"avatar"`CreateTime string `db:"create_time"`UpdateTime string `db:"update_time"`}userData := new(user)mysqlDB.Get(userData, "select * from user where id =1")fmt.Println(*userData)var userSlice []usererr := mysqlDB.Select(&userSlice, "select*from user")if err != nil {fmt.Println(err)}for i := range userSlice {fmt.Println(userSlice[i])}}

總結

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