Load a File From Classpath In Spring Boot

Load a File From Classpath In Spring Boot:-

In this post, we are going to check How to Load a File From Classpath In Spring Boot. Long back I was working on a very simple project.

I wanted to read a JSON file from the resources folder src/main/resources. Hence written a code something like this below .

Now, this code works completely fine once I run it using,mvn:spring-boot:run but as soon I’m building and packaging the application using maven and running it as simple executable jar I’m getting an exception . Let’s go ahead and find out the solution now.

1. Using InputStream:-

Let’s See How We can read the File.

We have seen How we can Load a File From Classpath In Spring Boot , If the file is inside a jar .

2.Reading as a File:-

There is another way to load resources in spring boot. We are now going to check how we can load a file from classpath in spring boot if the file is present in the filesystem not inside a jar.

3. Reading Resource as ResourceLoader :-

ResourceLoader is used to loads resources from classpath as well as file system.

Now we can use resource.getInputStream() or resource.getFile() as required.

4. Using ResourceUtils:-

Load a file from classpath in spring boot using ResourceUtils resolves the given resource location to a,java.io.File i.e. to a file in the file system.It doesn’t check if the file exists or not.

 

 

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