无法从浏览器访问 localhost:8080 公用文件夹（java spring 启动）

Question

i have a java spring boot application that have functionality to save files in "src/main/resources/public/myFiles" path. Now i want to access files and i tried to access the file by typing " http://localhost:8080/public/myFiles " and i'm getting an error saying below.

Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback.

There was an unexpected error (type=Not Found, status=404). No message available

Answer 1

I think you have to add the location to your static folder in the application.properties

spring.resources.static-locations=file:<location>

And also to access the file don't give the static-locations folder name. you can access it directly if it is not in a subfolder. like this

http://localhost:8080/filename.ext

Answer 2

You cannot access your file if it's not on your static folder location, otherwise you need to specify the exact path and file name to access it.

Answer 3

So I have been making a file sharing web app using Spring Boot and here is how I have facilitated getting files from the database. I will focus specifically on your problem because it is very similar to what I faced a few days ago.

Firstly, I make a POJO class Files which has details like filename , lastmodified , and some others which are not relevant to your problem here.

I get the files from the database using a DAO class, add the above mentioned attributes in an ArrayList and return the ArrayList back to the Controller class. In the Controller class, using request object I do the following: request.setAttribute("files", files);

Now in my jsp file, I use JSTL to get files like this:

<c:forEach var="j" items="${files}">
    <td>
        <a href="resources/files/${j.getFilename()}" target="_blank" rel="noopener noreferrer">${j.getFile()}</a>
    </td>
</c:forEach>

resources/files/ is the path where my files are stored after being uploaded and using target="_blank" rel="noopener noreferrer" enables me to open files (files which the browser allows to be opened such as pdf and text files) in a new tab and those which cannot be opened get automatically downloaded.