Properties file Read/Write in Java

protected static Properties prop;

/**

* Method to load Property files

*

* @param filePath

* @return Properties

* @throws Exception

*/

public static Properties loadProperties(String filePath) throws Exception {

try {

prop = new Properties();

// Read object repository file

FileInputStream fis = new FileInputStream(new File(filePath));

// load all objects

prop.load(fis);

return prop;

} catch (Exception e) {

e.printStackTrace();;

}

return prop;

}

/**

* Method to get property valueF

*

* @param p

* -Properties

* @param name

* @return propValue

*/

public static String getProperties(Properties p, String name) {

String propValue = null;

try {

propValue = p.getProperty(name);

return propValue;

} catch (Exception e) {

e.printStackTrace();

}

return propValue;

}

 

/**
     * To set value into Property file
     *
     * @param prop
     * @param key
     * @param value
     */
    public void setProperty(Properties prop, String key, String value, String filePath) throws Exception {
        try {
            prop.setProperty(key, value);
            prop.store(new FileOutputStream(filePath), null);
        } catch (Exception e) {
          e.printStackTrace();
        }
    }
 

/**
     * Loading A Property File From The Classpath
     *
     * @param fileName
     *            - only file name without complete path
     * @throws Exception
     */
    public Properties loadPropertyFileFromClasspath(String fileName) throws Exception {
        try {
            if (fileName != null && !fileName.isEmpty()) {
                InputStream ins =  this.getClass().getClassLoader().getResourceAsStream(fileName);
                prop.load(ins);
            } else {
                throw new Exception("property file '" + fileName + "' not found in the classpath");
            }
        } catch (Exception e) {
            throw new Exception("Error while loadProperties: " + e.toString());
        }
        return prop;

    }