How to get all properties files in a package and update the key values using java?

Question

I tried a lot, but was unable to find a solution.

|
|--src/main/resouces
       |
       |-updatePropertiesFile.java
       |-xyz_en_US.properties
       |-xyz_e         


        

Answer 1

This code iterates over all files in a given directory and opens each .properties file. It then applies the changed values and stores the file again.

public void changePropertyFilesInFolder(File folder) {
    for(File file : folder.listFiles()) {
        if(file.isRegularFile() && file.getName().endsWith(".properties")) {
            Properties prop = new Properties();
            FileInputStream instream = new FileInputStream(file);
            prop.load(instream);
            instream.close();
            prop.setProperty("foo", "bar"); // change whatever you want here
            FileOutputStream outstream = new FileOutputStream(file);
            prop.store(outstream, "comments go here");
            outstream.close();
        }
    }
}