背景

正式環境出現jar版本不匹配問題，不知道正式環境用的哪個jar版本。通過一下可以打印出類調用的jar

// 獲取 POIFSFileSystem 類的加載器并打印其來源路徑
ClassLoader classloaderPOIFS = org.apache.poi.poifs.filesystem.POIFSFileSystem.class.getClassLoader();
URL resPOIFS = classloaderPOIFS.getResource("org/apache/poi/poifs/filesystem/POIFSFileSystem.class");
String pathPOIFS = resPOIFS != null ? resPOIFS.getPath() : "Not found";
System.out.println("POIFSFileSystem came from " + pathPOIFS);// 獲取 WorkbookFactory 類的加載器并打印其來源路徑
ClassLoader classloaderWorkbook = org.apache.poi.ss.usermodel.WorkbookFactory.class.getClassLoader();
URL resWorkbook = classloaderWorkbook.getResource("org/apache/poi/ss/usermodel/WorkbookFactory.class");
String pathWorkbook = resWorkbook != null ? resWorkbook.getPath() : "Not found";
System.out.println("WorkbookFactory came from " + pathWorkbook);