读取文件

    1. //方式1
    2. ClassPathResource classPathResource = new ClassPathResource("excelTemplate/test.xlsx");
    3. InputStream inputStream = classPathResource.getInputStream();
    5. //方式2
    6. InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("excelTemplate/test.xlsx");
    8. //方式3
    9. InputStream inputStream = this.getClass().getResourceAsStream("/excelTemplate/test.xlsx");
    11. //方式4
    12. File file = ResourceUtils.getFile("classpath:excelTemplate/test.xlsx");
    13. InputStream inputStream = new FileInputStream(file);

    方式1，2，3都可以，方式4打包成jar后无法读取。