How to maintain, update application properties dynamically in Spring? [duplicate]

Question

I would like to maintain a list of application properties like service endpoints, application variables, etc. in a Spring application. These properties should be able to updated dynamically (possibly through an web page by system administrator).

Does spring has an inbuilt feature to accomplish this requirement?

Answer 1

I am not sure spring has an implementation for updating the properties file dynamically.

You can do something like reading the properties file using FileInputStream into a Properties object. Then you will be able to update the properties. Later you can write back the properties to the same file using the FileOutputStream.

// reading the existing properties
FileInputStream in = new FileInputStream("propertiesFile");
Properties props = new Properties();
props.load(in);
in.close();
// writing back the properties after updation
FileOutputStream out = new FileOutputStream("propertiesFile");
props.setProperty("property", "value");
props.store(out, null);
out.close();