BAEL-923 How to inject a value from properties to a class not managed by Spring? (#1878)

* adam.zawada@gmail.com - Different Types of Bean Injection in Spring

* adam.zawada@gmail.com - Different Types of Bean Injection in Spring
switch to Java based configuration

* BAEL-895 calculate the period/duration between two dates in Java 8

* clean old PR

* BAEL-923 How to inject a value from properties to a class not managed by Spring?

* clean PR

core-java/src/main/java/com/baeldung/util/PropertiesLoader.java

@@ -0,0 +1,19 @@
+package com.baeldung.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Properties;
+
+public class PropertiesLoader {
+
+    public static Properties loadProperties(String resourceFileName) throws IOException {
+        Properties configuration = new Properties();
+        InputStream inputStream = PropertiesLoader.class
+          .getClassLoader()
+          .getResourceAsStream(resourceFileName);
+        configuration.load(inputStream);
+        inputStream.close();
+        return configuration;
+    }
+
+}