package main import ( "database/sql" "fmt" _ "github.com/go-sql-driver/mysql" "log" ) var dataB *sql.DB func initDataB() (err error) { dataB, err = sql.Open("mysql", "root:123456@tcp(43.143.245.135:3306)/wangaodev") if err != nil { log.Println(err) return err } err = dataB.Ping() if err != nil { log.Println(err) return err } log.Println("Successfully connected to mysql") dataB.SetMaxOpenConns(10) dataB.SetMaxIdleConns(5) return nil } type newUser struct { name string level string status int } // 预处理方式插入多条数据 func prepareInsert() { sqlStr := `insert into user (name,level,status) values (?,?,?)` stmt, err := dataB.Prepare(sqlStr) if err != nil { log.Fatal("prepare failed:", err) } defer stmt.Close() //后续只需要拿到stmt去执行一些操作 userData := []newUser{ {name: "Alice", level: "中级", status: 1}, {name: "Bob", level: "高级", status: 2}, {name: "Charlie", level: "初级", status: 0}, } //循环结构体切片执行 var sum = 0 for _, v := range userData { ret, err := stmt.Exec(v.name, v.level, v.status) if err != nil { return } n, _ := ret.RowsAffected() sum = sum + int(n) } fmt.Printf("%v rows has been affected", sum) } func main() { err := initDataB() if err != nil { return } prepareInsert() }