如何在.properties文件中创建键值对的哈希表而不在文件中包含注释行

import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

public class PropertiesLoader {
    private Map<String, String> propertiesMap;

    public PropertiesLoader(String propertiesFilePath) {
        propertiesMap = loadProperties(propertiesFilePath);
    }

    private Map<String, String> loadProperties(String propertiesFilePath) {
        Properties properties = new Properties();
        Map<String, String> map = new HashMap<>();

        try (FileInputStream inputStream = new FileInputStream(propertiesFilePath)) {
            properties.load(inputStream);
            for (String key : properties.stringPropertyNames()) {
                String value = properties.getProperty(key);
                map.put(key, value);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        return map;
    }

    public String getValue(String key) {
        return propertiesMap.get(key);
    }
}

# 这是一个示例配置文件
# 注释行以井号(#)开头

database.url=jdbc:mysql://localhost:3306/mydatabase
database.username=admin
database.password=123456

public class MyApp {
    public static void main(String[] args) {
        PropertiesLoader propertiesLoader = new PropertiesLoader("config.properties");
        
        String databaseUrl = propertiesLoader.getValue("database.url");
        String username = propertiesLoader.getValue("database.username");
        String password = propertiesLoader.getValue("database.password");
        
        System.out.println("Database URL: " + databaseUrl);
        System.out.println("Username: " + username);
        System.out.println("Password: " + password);
    }
}

Database URL: jdbc:mysql://localhost:3306/mydatabase
Username: admin
Password: 123456