feat:补充sqlnullstring的扫描方法

client/mysql.go

@@ -48,6 +48,23 @@ func StringHandler(results *sql.Rows) []string {
  return characters
 }
 
+// NullStringHandler 处理从数据库里查出来的字符串的信息
+func NullStringHandler(results *sql.Rows) []sql.NullString {
+ characters := make([]sql.NullString, 0)
+ for results.Next() {
+ character := sql.NullString{}
+ err := results.Scan(&character.String)
+ if err != nil {
+ log.Printf("Scan string err: [%+v]", err)
+ continue
+ }
+
+ characters = append(characters, character)
+ }
+
+ return characters
+}
+
 // NumberHandler 处理从数据库里查出来的数字的信息
 func NumberHandler(results *sql.Rows) []int {
  numbers := make([]int, 0)