Today all lists of my sharepoint all site are suddenly disappeared.I do not know what happened in the end. Now all the list can not display it.When I click on the list will be displayed some error. like this:

This result is not only this list displayed. All of site, All of list ,All displayed on this page. Even in the event of this thing, and then create a new list will be displayed on this page.
When I go to the root directory of sharepoint site to find the file, I found that even folders are GONE!!!!!!!!!!!! They were abducted by aliens.
I suspect this is I broke it. I made a webpart deployed on the site. The function of the webpart is extract the current list of information and saved to a file. After deployment, it shows not find the file path. The path is web site root directory \lists\wordtest\test\just for test.docx Then I found out there is no root directory folder called list. So I follow the prompts to create a new folder named list and the subfolder.
AFTER THAT ALL LISTS ARE GONE!!!!!!! I know it still exists, but I do not see it. I can see it in the sharepoint designer and I can edit all of the pages inside. But the result is always wrong to get on the page.
I need your help very much. I will be very grateful to you.