增加综窗接口文件预览功能

sst-manager/src/main/java/com/mortals/xhx/module/sst/web/SyntheticalController.java

@@ -459,8 +459,8 @@ public class SyntheticalController extends BaseJsonBodyController {
                     String filePath = rootPath + "temp/" + fileName;
                     OutputStream outputStream = null;
                     File file = new File(filePath);
-                    if (file.exists()) {
-                        file.delete();
+                    if (!file.exists() && !file.isDirectory()) {
+                        file.mkdirs();
                     }
                     outputStream = new FileOutputStream(file);
                     outputStream.write(data);