无法通过Java Web应用程序在Wildfly服务器中创建目录

Question

I want to create a directory structure inside the wild-fly server at the run time of my web java web application. Here is the sample code inside my controller.

        String directoryName = null;
        try {
            directoryName = "/parent_folder/subfolder/";
            File directory = new File(directoryName);
            if (! directory.exists()){
                directory.mkdirs();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

This code not firing any exceptions. But it doesn't create the folders too. I debugg with this code. It shows code running successfully without having any exceptions. Additionally my wild-fly server is running on a Ubuntu machine.

---

I changed my code as follows . but the problem is same.

   String directoryName = null;
            try {
                directoryName = "/parent_folder/sub-folder/";
                String filePath = new File("").getAbsolutePath();
                filePath.concat(directoryName);
                File directory = new File(filePath);
                if (! directory.exists()){
                    directory.mkdirs();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }

Answer 1

Have a look at the API docs for Java SE . mkdirs returns a boolean if creation was successful.

Hence, you must change it to:

String directoryName = null;
            try {
                directoryName = "/parent_folder/sub-folder/";
                String filePath = new File("").getAbsolutePath();
                filePath.concat(directoryName);
                File directory = new File(filePath);
                if (! directory.exists()){
                    boolean created = directory.mkdirs();
                    if (!created) {
                      //TODO: add your code here
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
            }