import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.util.Properties;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * 属性文件工具类 */public final class PropsUtil {    private static final Logger LOGGER = LoggerFactory.getLogger(PropsUtil.class);    /**     * 加载属性文件     */    public static Properties loadProps(String fileName) {        Properties props = null;        InputStream is = null;        try {            is = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);            if (is == null) {                throw new FileNotFoundException(fileName + " file is not found");            }            props = new Properties();            props.load(is);        } catch (IOException e) {            LOGGER.error("load properties file failure", e);        } finally {            if (is != null) {                try {                    is.close();                } catch (IOException e) {                    LOGGER.error("close input stream failure", e);                }            }        }        return props;    }    /**     * 获取字符型属性（默认值为空字符串）     */    public static String getString(Properties props, String key) {        return getString(props, key, "");    }    /**     * 获取字符型属性（可指定默认值）     */    public static String getString(Properties props, String key, String defaultValue) {        String value = defaultValue;        if (props.containsKey(key)) {            value = props.getProperty(key);        }        return value;    }    /**     * 获取数值型属性（默认值为 0）     */    public static int getInt(Properties props, String key) {        return getInt(props, key, 0);    }    // 获取数值型属性（可指定默认值）    public static int getInt(Properties props, String key, int defaultValue) {        int value = defaultValue;        if (props.containsKey(key)) {            value = CastUtil.castInt(props.getProperty(key));        }        return value;    }    /**     * 获取布尔型属性（默认值为 false）     */    public static boolean getBoolean(Properties props, String key) {        return getBoolean(props, key, false);    }    /**     * 获取布尔型属性（可指定默认值）     */    public static boolean getBoolean(Properties props, String key, boolean defaultValue) {        boolean value = defaultValue;        if (props.containsKey(key)) {            value = CastUtil.castBoolean(props.getProperty(key));        }        return value;    }}