Get path of file inside project src and pass it to fileoutputstream for overwriting

Question

Successfully accessed a property file via getResourcestream and read using fileinputstream. Now I need to overwrite the same file after appending a new property

Problem: stuck getting path of the same file which is required by fileoutputstream for overwriting.

property file is in src/main/resources. and trying to update from src/main/java/com/web/my.class

    Properties prop = new Properties();
    InputStream in = getClass().getClassLoader().getResourceAsStream("dme.properties");
    FileOutputStream out = null;
    try {
         prop.load(in);}  // load all old properties
    catch (IOException e) {}
    finally {try { in.close(); } catch (IOException e) {} }
    prop.setProperty("a", "b"); //new property
    try {
        out = new FileOutputStream("dme.properties");
        prop.store(out, null);} //overwrite
    catch (IOException e) {} 
    finally {try {out.close();} catch (IOException e) {} }
  }

Answer 1

Instead of getting the InputStream, you can get the resource URL and use that to read and write with your file from src/main/resources:

Properties properties = new Properties();
File file = new File(this.getClass().getResource("/dme.properties").toURI());
try (InputStream is = new FileInputStream(file)) {
    properties.load(is);
}
properties.setProperty("a", "b");
try (OutputStream os = new FileOutputStream(file)) {
    properties.store(os, null);
}