1.工具类-ConfigurationUtils

import org.apache.commons.configuration2.Configuration;
import org.apache.commons.configuration2.SystemConfiguration;
import org.apache.commons.configuration2.builder.fluent.Configurations;
import org.apache.commons.configuration2.ex.ConfigurationException;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.io.File;

/**
 * @Auther:BigData-weic
 * @ClassName:ConfigurationUtils
 * @Date:2021/8/6 12:43
 * @功能描述: 用于加载默认的config.properties文件，提供Configuration
 * @Version:1.0
 */
public class ConfigurationUtils {
    private static final Logger logger = LogManager.getLogger("ConfigurationUtils");
    private static Configuration config;

    static {
        load();
    }

    /* *
     * 功能描述：加载配置文件config.properties
     * @return: void
     * @date: 2021/8/6 12:49
     */
    private static void load() {
        try {
            SystemConfiguration systemConfig = new SystemConfiguration();
            String configFile = systemConfig.getString("config-file", "config.properties");
            logger.info("Loading config file from {}", configFile);
            config = new Configurations().properties(new File(configFile));
        } catch (ConfigurationException e) {
            logger.error(e.getMessage());
            System.exit(1);
        }
    }

    /* *
     * 功能描述：get config
     * @return: org.apache.commons.configuration2.Configuration
     * @date: 2021/8/6 13:02
     */
    public static Configuration getConfig() {
        return config;
    }
}

2.使用

ConfigurationUtils.getConfig().getInt("key", defaultValues);
ConfigurationUtils.getConfig().getString("key", defaultValues);