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();
        }
    }
}

Answer 2

Every Java IDE out there has a replace-in-path function. Sublime Text, VS Code and Atom almost certainly have that as well. IntelliJ's particularly good. No reason to even write Java code to do this. Otherwise, it's as simple as:

File[] files = new File("src/main/resources").listFiles();
for (File file in files) {
    if (file.getName().endsWith("properties")) {
        //Load and change...
    }
}