classpath下excel文件读取

ClassPathResource classPathResource = new ClassPathResource("excle/template.xlsx");
InputStream inputStream =classPathResource.getInputStream();

InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("excle/template.xlsx");

InputStream inputStream = this.getClass().getResourceAsStream("excle/template.xlsx");

File file = ResourceUtils.getFile("classpath:excle/template.xlsx");
InputStream inputStream = new FileInputStream(file);

以上四种方式中，第4种仅在开发阶段可用，打包部署在linux服务器时不可用