get absolute path to apache webcontents folder from a java class file
Need to get absolute path in java class file, inside a dynamic web application...
Actually i need to get path of apache webapps folder... where the webapps are deployed
e.g. /apache-root/webapps/my-deployed-app/WebContent/images/imagetosave.jpg
Need to get this in a java class file, not on jsp page or any view page...
any ideas?
Answer
Actually i need to get path of apache webapps folder... where the webapps are deployed
e.g. /apache-root/webapps/my-deployed-app/WebContent/images/imagetosave.jpg
As mentioned by many other answers, you can just use ServletContext#getRealPath() to convert a relative web content path to an absolute disk file system path, so that you could use it further in File or FileInputStream. The ServletContext is in servlets available by the inherited getServletContext() method:
String relativeWebPath = "/images";
String absoluteDiskPath = getServletContext().getRealPath(relativeWebPath);
File file = new File(absoluteDiskPath, "imagetosave.jpg");
// ...
However, the filename "imagetosave.jpg" indicates that you're attempting to store an uploaded image by FileOutputStream. The public webcontent folder is the wrong place to store uploaded images! They will all get lost whenever the webapp get redeployed or even when the server get restarted with a cleanup. The simple reason is that the uploaded images are not contained in the to-be-deployed WAR file at all.
You should definitely look for another location outside the webapp deploy folder as a more permanent storage of uploaded images, so that it will remain intact across multiple deployments/restarts. Best way is to prepare a fixed local disk file system folder such as /var/webapp/uploads and provide this as some configuration setting. Finally just store the image in there.
String uploadsFolder = getItFromConfigurationFileSomehow(); // "/var/webapp/uploads"
File file = new File(uploadsFolder, "imagetosave.jpg");
// ...