Invalid header reading xls file

Question

I am reading one excel file on my local system. I am using POI jar Version 3.7, but getting error Invalid header signature; read -2300849302551019537 or in Hex 0xE011BDBFEF

Answer 1

If your project is maven project, the following code may help:

/**
 * Get input stream of excel.
 * 

 *     Get excel from src dir instead of target dir to avoid causing POI header exception.
 * 
 * @param fileName file in dir PROJECT_PATH/src/test/resources/excel/ , proceeding '/' is not needed.
 * @return
 */
private static InputStream getExcelInputStream(String fileName){
    InputStream inputStream = null;
    try{
        inputStream = new FileInputStream(getProjectPath() + "/src/test/resources/excel/" + fileName);
    }catch (URISyntaxException uriE){
        uriE.printStackTrace();
    }catch (FileNotFoundException fileE){
        fileE.printStackTrace();
    }
    return inputStream;
}

private static String getProjectPath() throws URISyntaxException{
    URL url = YourServiceImplTest.class.getResource("/");
    Path path = Paths.get(url.toURI());
    Path subPath = path.subpath(0, path.getNameCount() -2);
    return "/" + subPath.toString();
}