import org.springframework.core.io.ClassPathResource;

public byte[] getCertStream(String path) {

          try {

            ClassPathResource classPathResource = new ClassPathResource(path);

            //获取文件流

            InputStream stream = classPathResource.getInputStream();

            byte[] content = IOUtils.toByteArray(stream);

            stream.read(content);

            stream.close();
　　　　　　　return content;

        } catch (IOException e) {

            e.printStackTrace();

        }

   }