PropertiesUtil,读取properties文件

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public class PropertiesUtil {    private static HashMap<String, String> configMap;    private static Logger logger = LoggerFactory.getLogger(PropertiesUtil.class);    public static void init(String path) {        // 把config.properties配置文件中的配置信息放入到Map中        configMap = new HashMap<String, String>();        Properties p = new Properties();        try {            //获取要加载的文件            p.load(new FileInputStream(new File(getClassPath()                    + path)));        } catch (IOException e) {            logger.error("init properties file excetion", e);        }        Set<Object> keySet = p.keySet();        for (Object key : keySet) {            configMap.put(key.toString(), p.getProperty(key.toString()));        }    }      /**     * 从ClassPath中的读取属性的名称     *      * @param fileName 系统文件名称，在classpath下"#.properties"     * @param propertyName 属性名称     * @return     */    public static String getPropertys(String fileName, String propertyName) {        String value = "";        try {            Properties props = PropertiesLoaderUtils.loadAllProperties(fileName);            value = props.getProperty(propertyName);        } catch (IOException e) {            logger.debug("file not found ", e);        }        return value;    }     /**     * 获取系统文件classpath路径     *      * @return     */    public static String getClassPath() {        return PropertiesUtil.class.getClassLoader().getResource("").getPath().replaceAll("%20", " ");    }    /**     * 设置系统配置文件值     *      * @param fileName     *            系统文件名称，在classpath下"#.properties"     * @param map     *            含有配置文件中属性的键值对儿     */    public static boolean setPropertyFile(String fileName,            Map<String, String> map) {        Properties props = new Properties();        InputStream in = null;        OutputStream out = null;        try {            in = new FileInputStream(getClassPath() + fileName);            props.load(in);            out = new FileOutputStream(getClassPath() + fileName);            Iterator<Entry<String, String>> iterator = map.entrySet()                    .iterator();            while (iterator.hasNext()) {                Entry<String, String> entry = iterator.next();                String key = entry.getKey().toString();                String value = entry.getValue().toString();                props.setProperty(key, value);            }            props.store(out,null);            return true;        } catch (FileNotFoundException e) {            logger.debug("file not found ", e);        } catch (IOException e) {            logger.debug("can't get stream", e);        } finally {            try {                if (null != in) {                    in.close();                }                if (null != out) {                    out.close();                }            } catch (IOException e) {                logger.debug("can't close stream", e);            }        }        return false;    }    /**     * 设置系统配置文件值     *      * @param dir     *            根据路径找到properties文件     * @param map     *            含有配置文件中属性的键值对儿     */    public static boolean setPropertyDirFile(String dir, Map<String, String> map) {        Properties props = new Properties();        InputStream in = null;        OutputStream out = null;        try {            in = new FileInputStream(dir);            props.load(in);            out = new FileOutputStream(dir);            Iterator<Entry<String, String>> iterator = map.entrySet()                    .iterator();            while (iterator.hasNext()) {                Entry<String, String> entry = iterator.next();                String key = entry.getKey().toString();                String value = entry.getValue().toString();                props.setProperty(key, value);            }            props.store(out, null);            return true;        } catch (FileNotFoundException e) {            logger.debug("file not found ", e);        } catch (IOException e) {            logger.debug("can't get stream", e);        } finally {            try {                if (null != in) {                    in.close();                }                if (null != out) {                    out.close();                }            } catch (IOException e) {                logger.debug("can't close stream", e);            }        }        return false;    }    /**     * 根据key得到配置项的值     *      * @param key     * @return     */    public static String getProperty(String path, String key) {        init(path);        return configMap.get(key);    }    /**     * 根据提供po文件 路径和key得到值     *      * @param path     * @param key     * @return     */    public static String getPropertyByPath(String path, String key) {        configMap = new HashMap<String, String>();        Properties p = new Properties();        try {            p.load(new FileInputStream(new File(path)));        } catch (IOException e) {            logger.error("init properties file excetion", e);        }        Set<Object> keySet = p.keySet();        for (Object key1 : keySet) {            configMap.put(key1.toString(), p.getProperty(key1.toString()));        }        return configMap.get(key);    }    /**     * 根据提供po文件 路径得到键值对     *      * @param path     * @param key     * @return     */    public static Map<String, String> getPropertyByPath(String path) {        configMap = new HashMap<String, String>();        Properties p = new Properties();        try {            p.load(new FileInputStream(new File(path)));        } catch (IOException e) {            logger.error("init properties file excetion", e);        }        Set<Object> keySet = p.keySet();        for (Object key1 : keySet) {            configMap.put(key1.toString(), p.getProperty(key1.toString()));        }        return configMap;    }}
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