java根据配置文件读取值

<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.4</version>
</dependency>

/**.
     * @param filename 配置文件路径
     * @param stringk 配置文件的K值 
     * @return 返回V值
     */
    public static String getSfpt(String filename,String stringk) {
        Properties p = new Properties();
        try {
        InputStream is=   readParperties.class.getResourceAsStream(filename);
        //需要专门的工具类来讲流中的数据
            p.load(is);
        } catch (IOException e) {
            System.err.println("文件找不着");
        }
        String property = p.getProperty(stringk);
        return property;
    }