读写Properties文件

public class PropertiesUtil {

    public static Properties loadPropertFile(String filePath) {
        Properties properties = new Properties();
        try {
            InputStream in = new BufferedInputStream(new FileInputStream(filePath));
            BufferedReader reader = new BufferedReader(new InputStreamReader(in, "utf-8"));
            properties.load(reader);
            in.close();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return properties;
    }

    /**
     * 对指定的属性文件的指定键的值进行读取
     *
     * @param filePath
     * @param key
     * @return
     */
    public static String readPropertByKey(String filePath, String key) {
        String value = "";
        Properties properties = loadPropertFile(filePath);
        value = properties.getProperty(key);
        return value;
    }

    /***
     * 将键值对追写进指定的属性文件中
     * @param filePath
     * @param map
     * @return
     */
    public static boolean appendPropert(String filePath, Map<String, String> map) {
        boolean flag = false;
        Properties properties = loadPropertFile(filePath);
        try {
            OutputStream outputStream = new FileOutputStream(filePath);
            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(outputStream, "utf-8"));
            for(String key : map.keySet()){
                properties.setProperty(key, map.get(key));
            }
            properties.store(bw, null);
            outputStream.close();
            flag = true;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return flag;
    }
}