[Java] Save and Load Settings with Properties (Properties를 이용해서 설정값 읽고 쓰기)

Settings.java

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import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.Properties; public class Settings { String propertyFileName = "config.properties"; String name; int age; public void Settings(String filename) { if( filename != null ) { propertyFileName = filename; } } public void save() { try { OutputStream output = new FileOutputStream(propertyFileName); Properties prop = new Properties(); prop.setProperty("name", name); prop.setProperty("age", String.valueOf(age)); prop.store(output, null); output.close(); } catch (IOException e1) { e1.printStackTrace(); } } public void load() { try { InputStream input = new FileInputStream(propertyFileName); Properties prop = new Properties(); prop.load(input); input.close(); name = prop.getProperty("name",""); age = Integer.valueOf(prop.getProperty("age","0")); } catch (IOException e) { e.printStackTrace(); } }

Main.java

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public static void main(String[] args) { Settings setting = new Settings(); setting.load(); setting.name = "Zdiv"; setting.age = 20; setting.save(); Settings setting2 = new Settings(); setting2.load(); System.out.println("name: " + setting2.name); System.out.println("age: " + setting2.age); }

Output:

name: Zdiv
age: 20