From 8af13f9163a1a72246b08b8d29beb43b84101a32 Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Thu, 18 Jul 2024 00:51:24 +0800
Subject: [PATCH] connect mysql over

---
 go.mod                      |  5 +++++
 go.sum                      |  4 ++++
 mysql/golangconnectmysql.go | 29 +++++++++++++++++++++++++++++
 mysql/mysql.log             | 10 +++++++++-
 4 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 go.sum
 create mode 100644 mysql/golangconnectmysql.go

diff --git a/go.mod b/go.mod
index 8eb04f1..5c55d37 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,8 @@
 module course
 
 go 1.22
+
+require (
+	filippo.io/edwards25519 v1.1.0 // indirect
+	github.com/go-sql-driver/mysql v1.8.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..19dbcec
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,4 @@
+filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
+filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+github.com/go-sql-driver/mysql v1.8.1 h1:LedoTUt/eveggdHS9qUFC1EFSa8bU2+1pZjSRpvNJ1Y=
+github.com/go-sql-driver/mysql v1.8.1/go.mod h1:wEBSXgmK//2ZFJyE+qWnIsVGmvmEKlqwuVSjsCm7DZg=
diff --git a/mysql/golangconnectmysql.go b/mysql/golangconnectmysql.go
new file mode 100644
index 0000000..3e1a33c
--- /dev/null
+++ b/mysql/golangconnectmysql.go
@@ -0,0 +1,29 @@
+package main
+
+import (
+	"database/sql"
+	_ "github.com/go-sql-driver/mysql" //自动执行init()
+	"log"
+)
+
+// go链接mysql示例
+func main() {
+	//数据库信息
+	dsn := "root:123456@tcp(43.143.245.135:3306)/wangaodev"
+	//连接数据库
+	db, err := sql.Open("mysql", dsn) //不会校验用户名和密码是否正确
+	if err != nil {
+		//dsn 格式不正确会报错
+		log.Fatalf("dsn:%s invalid ,err%v\n", dsn, err)
+		return
+	}
+	//校验用户名和密码是否正确
+	//尝试连接数据库
+	err = db.Ping()
+	if err != nil {
+		log.Fatalf("open %s failed,err%v\n", dsn, err)
+		return
+	}
+	log.Printf("connect %s success.\n", dsn)
+	defer db.Close()
+}
diff --git a/mysql/mysql.log b/mysql/mysql.log
index 31a5fac..65e3e93 100644
--- a/mysql/mysql.log
+++ b/mysql/mysql.log
@@ -31,4 +31,12 @@ SQL慢查询优化
 运维相关
 MYSQL主从
  binlog
-MYSQL读写分离
\ No newline at end of file
+MYSQL读写分离
+
+golang 的database/sql 原生支持链接池，是并发安全的
+这个标准库没有具体的实现，只是列出了一些第三方库需要实现的内容
+
+下载驱动
+go get -u github.com/go-sql-driver/mysql
+
+导入驱动