mysql prepare us finished

.idea/sqldialects.xml

@@ -1,7 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="SqlDialectMappings">
-    <file url="file://$PROJECT_DIR$/mysql/mysql_insert.go" dialect="GenericSQL" />
+    <file url="file://$PROJECT_DIR$/mysql/mysql_insert_update_delete.go" dialect="GenericSQL" />
     <file url="file://$PROJECT_DIR$/mysql/mysql_rowquery.go" dialect="GenericSQL" />
+    <file url="file://$PROJECT_DIR$/mysql/sql_prepare.go" dialect="GenericSQL" />
+    <file url="PROJECT" dialect="GenericSQL" />
   </component>
 </project>

mysql/sql_prepare.go

@@ -0,0 +1,77 @@
+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
+}
+
+func generateNewUser(name, level string, status int) *newUser {
+	return &newUser{
+		name:   name,
+		level:  level,
+		status: status,
+	}
+}
+
+// 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()
+}