File 读取本地文件转化成字符串

第一种File file =new File(path);if(!file.exists()||!file.isFile())return "file is not exists";FileInputStream inputStream =null;try {inputStream=new FileInputStream(file);    ByteBuffer buffer=ByteBuffer.allocate((int)file.length());    inputStream.getChannel().read(buffer);        String strPnr=new String(buffer.array());第二种：URL url=ReceiveXmlCommand.class.getClassLoader().getResource(path);        String strPnr = IOUtils.toString(url.openStream());    IOUtils.closeQuietly(inputStream);

path 路径看需求是怎么获得了