CODEWITHSUNDEEP
javaspringspring-boot
María Cristina Fernández López
María Cristina Fernández López

Reputation: 437

How to set file location in application properties - Spring boot

I have a Spring Boot application. The code that needs to access a file is under the /resources/templates directory.

The property from my application.properties file that I'm trying to read is given below:

pont.email.template.location=templates/mailTemplate.html

The above property that I'm trying to access via @Value in one of the @Component class is given below:

@Value("${pont.email.template.location}") 
private String templateLocation;

Now, I have this code given below which takes the template location and tries to read it via BufferedReader.

BufferedReader reader = new BufferedReader(new FileReader(templateLocation));

Now, the value containing the file location is getting picked up properly by @Value from application.properties.

But the problem is that the application is not able to find templates/mailTemplate.html.

The error that I'm getting is given below:

java.io.FileNotFoundException: templates/mailTemplate.html (No such file or directory)

Note: I have checked that mailTemplate.html is present under the /resources/templates directory.

How to resolve this issue?

Upvotes: 5

Views: 50271

Answers (1)

M. Deinum
M. Deinum

Reputation: 124526

You cannot read a File from inside a JAR. This fails due to the fact that the File has to point to an actual file resource on the file system and not something inside a JAR.

Let Spring do the heavy lifting and use the Resource abstraction to hide the nasty internals. So instead of using a String use a Resource and prefix the value of the property with classpath: to make sure it is loaded from the classpath. Then use an InputStreamReader instead of FileReader to obtain the information you need. 

@Value("${pont.email.template.location}") 
private Resource templateLocation;
----------------
BufferedReader reader = new BufferedReader(new InputStreamReader(templateLocation.getInputStream()));

In your application.properties prefix with classpath:.

pont.email.template.location=classpath:templates/mailTemplate.html

Now it should work regardless of the environment you are running in.

Upvotes: 11

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