jsp - 在 Web 项目中创建文件夹？

Question

我的web项目是Tomcat+jsp。当我尝试在此项目中创建文件夹时，我的代码中没有异常，并且始终显示文件夹存在。但是，我无法从目录中找到该文件夹​​。

我的代码如下:

private static final String imagFolder="pictures";
private static final String Separator=java.io.File.separator;
String directory = request.getContextPath()+Separator+imagFolder;
CreateFileUtil.createDir(directory);

*****CreateFileUtil.createDir*************************************** *

public static  boolean createDir( String destDirName) {
    File dir = new File(destDirName);
    if (dir.exists()) {// in this line,there is not exception and return true however, when I check the direcotry ,there folder doesn't exists
        System.out.println("create directory" + destDirName + "Failure, it already exists");
        return false;
    }
    if (!destDirName.endsWith(File.separator)) {
        destDirName = destDirName + File.separator;
    }
    //create
    if (dir.mkdirs()) {
        System.out.println("create directory" + destDirName + "Success");
        return true;
    } else {
        System.out.println("create directory" + destDirName + "Failure");
        return false;
    }
}

Answer 1

终于问题解决了。

我只是更改代码:

String directory = request.getContextPath()+Separator+imagFolder;

进入

 String directory=  request.getServletContext().getRealPath("/")+Separator+imagFolder;

然后就成功了。