Golang语言学习从入门到实战----Go操作Mysql实现增删改查

建库建表

新建person表

create table person(
user_id int primary key auto_increment,
username varchar(260),
sex varchar(260),
email varchar(260)
);

Golang操作Mysql数据库

安装sqlx

go get github.com/jmoiron/sqlx,

sqlx是一个go语言包，在内置database／sql包之上增加了很多扩展，简化数据库操作代码的书写

代码

定义初始化mysql函数:

func init() {
	database, err := sqlx.Open("mysql", "root:123456@tcp(192.168.0.131:3306)/goTest")
	if err != nil {
		fmt.Println("open mysql failed,", err)
		return
	}
	Db = database
}

注意: MySQL ERROR 1130 (HY000): Host 'XXXX' is not allowed to connect to this MySQL server要Mysql开启远程连接

use mysql;
update user set host = '%' where user = 'root';
flush privileges;

重启mysql

Insert

package main

import (
	"fmt"
	_ "github.com/go-sql-driver/mysql"
	"github.com/jmoiron/sqlx"
)

type Person struct {
	UserId   int    `db:"user_id"`
	Username string `db:"username"`
	Sex      string `db:"sex"`
	Email    string `db:"email"`
}


var Db *sqlx.DB

func init() {
	database, err := sqlx.Open("mysql", "root:123456@tcp(192.168.0.131:3306)/goTest")
	if err != nil {
		fmt.Println("open mysql failed,", err)
		return
	}
	Db = database
}

func main() {
	r, err := Db.Exec("insert into person(username, sex, email)values(?, ?, ?)", "stu001", "man", "[email protected]")
	if err != nil {
		fmt.Println("exec failed, ", err)
		return
	}
	id, err := r.LastInsertId()
	if err != nil {
		fmt.Println("exec failed, ", err)
		return
	}
	fmt.Println("insert succ:", id)

}

mysql> select * from person;
+---------+----------+------+--------------+
| user_id | username | sex  | email        |
+---------+----------+------+--------------+
|       1 | stu001   | man  | stu01@qq.com |
+---------+----------+------+--------------+
1 row in set (0.00 sec)

mysql> 

插入数据成功!

Update

package main

import (
	"fmt"

	_ "github.com/go-sql-driver/mysql"
	"github.com/jmoiron/sqlx"
)

type Person struct {
	UserId   int    `db:"user_id"`
	Username string `db:"username"`
	Sex      string `db:"sex"`
	Email    string `db:"email"`
}


var Db *sqlx.DB

func init() {
	database, err := sqlx.Open("mysql", "root:123456@tcp(192.168.0.131:3306)/goTest")
	if err != nil {
		fmt.Println("open mysql failed,", err)
		return
	}
	Db = database
}

func main() {

	_, err := Db.Exec("update person set username=? where user_id=?", "stu003", 1)
	if err != nil {
		fmt.Println("exec failed, ", err)
		return
	}

	fmt.Println("修改成功")
}

mysql> select * from person;
+---------+----------+------+--------------+
| user_id | username | sex  | email        |
+---------+----------+------+--------------+
|       1 | stu003   | man  | stu01@qq.com |
+---------+----------+------+--------------+
1 row in set (0.00 sec)

mysql> 

Select

package main

import (
	"fmt"

	_ "github.com/go-sql-driver/mysql"
	"github.com/jmoiron/sqlx"
)

type Person struct {
	UserId   int    `db:"user_id"`
	Username string `db:"username"`
	Sex      string `db:"sex"`
	Email    string `db:"email"`
}


var Db *sqlx.DB

func init() {
	database, err := sqlx.Open("mysql", "root:123456@tcp(192.168.0.131:3306)/goTest")
	if err != nil {
		fmt.Println("open mysql failed,", err)
		return
	}
	Db = database
}

func main() {

	var person []Person
	err := Db.Select(&person, "select user_id, username, sex, email from person where user_id=?", 1)
	if err != nil {
		fmt.Println("exec failed, ", err)
		return
	}

	fmt.Println("select succ:", person)
}

输出:

select succ: [{1 stu003 man stu01@qq.com}]

Delete

package main

import (
	"fmt"

	_ "github.com/go-sql-driver/mysql"
	"github.com/jmoiron/sqlx"
)

type Person struct {
	UserId   int    `db:"user_id"`
	Username string `db:"username"`
	Sex      string `db:"sex"`
	Email    string `db:"email"`
}


var Db *sqlx.DB

func init() {
	database, err := sqlx.Open("mysql", "root:123456@tcp(192.168.0.131:3306)/goTest")
	if err != nil {
		fmt.Println("open mysql failed,", err)
		return
	}
	Db = database
}

func main() {

	_, err := Db.Exec("delete from person where user_id=?", 1)
	if err != nil {
		fmt.Println("exec failed, ", err)
		return
	}

	fmt.Println("delete succ")
}

mysql> select * from person;
Empty set (0.00 sec)

mysql> 

删除成功!