Read file from resources folder in Spring Boot

Try this:

In application.properties

app.jsonSchema=classpath:jsonschema.json

On your Properties pojo:

**NOTE**: You can use any prefered way of reading configs from application.properties.

@Configuration
@ConfigurationProperties(prefix = "app")
public class ConfigProperties {
private Resource jsonSchema;

// standard getters and setters
}

In your class, read the resource from the Properties Pojo:

//Read the Resource and get the Input Stream
try (InputStream inStream = configProperties.getJsonSchema().getInputStream()) {
//From here you can manipulate the Input Stream as desired....
//Map the Input Stream to a Map
ObjectMapper mapper = new ObjectMapper();
Map <String, Object> jsonMap = mapper.readValue(inStream, Map.class);
//Convert the Map to a JSON obj
JSONObject json = new JSONObject(jsonMap);
} catch (Exception e) {
e.printStackTrace();
}