java读取文件、配置文件

    private static final String PATH_PREFIX = System.getProperty("user.dir") + File.separator + "config/json/";

    private JsonLoadUtils() {
    }

    /**
     * 根据config/json中的文件名称加载文件
     *
     * @param fileName 文件名称
     * @return
     */
    public static String load(String fileName) throws IOException {
        try {
            File file = ResourceUtils.getFile(String.format("%s%s", PATH_PREFIX, fileName));
            return FileUtils.readFileToString(file, "UTF-8");
        } catch (Exception e) {
            log.error("文件[{}]加载失败。", fileName, e.getMessage());
            throw e;
        }

    }

/**
     * 文件路径
     * @param path
     * @return
     */
    public static Properties getProperty(String path) {
        Properties properties = new Properties();
        try {
            properties.load(new InputStreamReader(new FileInputStream(path), "UTF-8"));
        } catch (Exception e) {
            log.error("read properties file Exception", e);
        }
        return properties;
    }

    /**
     *
     *@param filePath 读取文件路径
     *@return: java.lang.String
     */
    public static String readFile(String filePath) {
        String fileContent = "";
        try {
            File f = new File(filePath);
            if (f.isFile() && f.exists()) {
                InputStreamReader read = new InputStreamReader(new FileInputStream(f), "UTF-8");
                BufferedReader reader = new BufferedReader(read);
                StringBuffer buffer = new StringBuffer();
                String line;
                while ((line = reader.readLine()) != null) {
                    buffer.append(line);
                }
                fileContent= buffer.toString();
                read.close();
            }
        } catch (Exception e) {
            System.out.println("读取文件内容操作出错");
            e.printStackTrace();
        }
        return fileContent;
    }