java properties 文件获取工具类 (how to read values from properties file in java)

properties 文件获取工具类

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * properties文件获取工具类
 */
public class PropertiesReader {
    private static Logger logger = LogManager.getLogger(DelFilesJob.class.getName());

    private static Properties props;

    static {
        loadProps();
    }

    private static void loadProps() {
        logger.info("开始加载properties文件内容……");

        props = new Properties();
        InputStream is = null;

        try {
            //通过类加载器进行获取properties文件流
            is = PropertiesReader.class.getClassLoader().getResourceAsStream("config.properties");

            props.load(is);
        } catch (FileNotFoundException e) {
            logger.info("properties文件未找到");
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != is) {
                    is.close();
                }
            } catch (IOException e) {
                logger.info("properties文件流关闭出现异常");
            }
        }

        logger.info("加载properties文件内容完成……");
    }

    /**
     * 获取指定的properties文件属性值
     *
     * @param key
     * @return
     */
    public static String getProperty(String key) {

        return props.getProperty(key);
    }

    /**
     * 获取指定的properties文件属性值（带默认值）
     *
     * @param key
     * @param defaultValue
     * @return
     */
    public static String getProperty(String key, String defaultValue) {

        return props.getProperty(key, defaultValue);
    }

}