1. 实现配置文件解析

2. 实现数据库连接

vendor/gorm.io/gorm/schema/pool.go

@@ -0,0 +1,19 @@
+package schema
+
+import (
+	"reflect"
+	"sync"
+)
+
+// sync pools
+var (
+	normalPool      sync.Map
+	poolInitializer = func(reflectType reflect.Type) FieldNewValuePool {
+		v, _ := normalPool.LoadOrStore(reflectType, &sync.Pool{
+			New: func() interface{} {
+				return reflect.New(reflectType).Interface()
+			},
+		})
+		return v.(FieldNewValuePool)
+	}
+)