讀取特定資料夾下的xls檔
String docPath = String.format("%s/docs", System.getProperty("user.dir"));
List<Path> xlsPaths = new ArrayList<>();
try (Stream<Path> paths = Files.walk(Paths.get(docPath))) {
paths.filter(Files::isRegularFile)
.filter(p -> p.toString().endsWith(".xls"))
.forEach(xlsPaths::add);
}
xlsPaths.forEach(xls -> System.out.println(xls.toString()));
https://stackoverflow.com/questions/1844688/how-to-read-all-files-in-a-folder-from-java
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