linux部署出现java文件操作报错:java.io.FileNotFoundException解决办法

            ClassPathResource resource = new ClassPathResource("ip2region.xdb");
            //获取真实文件路径
            String path = resource.getURL().getPath();
            byte[] cBuff = Searcher.loadContentFromFile(path);

            ClassPathResource resource = new ClassPathResource("ip2region.xdb");
            InputStream inputStream = resource.getInputStream();
            byte[] bytes = IOUtils.toByteArray(inputStream);

File file = new File("/usr/webapps/MP/ip2region.xdb");
            if (file.exists()) {
                System.out.println("文件存在");
            } else {
                System.out.println("文件不存在");
            }
            if (file.isFile()) {
                System.out.println("是一个文件");
            } else {
                System.out.println("不是一个文件");
            }
            if (file.canRead()) {
                System.out.println("可读");
            } else {
                System.out.println("不可读");
            }
            if (file.canWrite()) {
                System.out.println("可写");
            } else {
                System.out.println("不可写");
            }