java:读/写配置文件

package jimmy;

import java.io.*;
import java.util.Properties;

public class Program {
    public static void main(String[] args) {

        String appTitle = "app_title";
        String appVersion = "app_version";
        String appProperties = "app.properties";

        Properties settings = new Properties();
        settings.put(appTitle, "应用程序标题");
        settings.put(appVersion, "1.0");

        try {
            
            //写入配置
            FileOutputStream out = new FileOutputStream(appProperties);
            settings.store(out, "AppConfig");

            //读取配置
            FileInputStream in = new FileInputStream(appProperties);
            settings.load(in);
            
            String title = settings.getProperty(appTitle);
            String version = settings.getProperty(appVersion);
            
            System.out.println(title + "\t" + version);
            
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}