Best practice to save temp files on tomcat? [duplicate]

Answer 1

You can use this method to get temp file location according to your Operating System

public static String getSystemFileLocation()
{
    File tmpFile = null;
    String fileLocation="/tmp/";
    if (System.getProperty("os.name").toUpperCase().indexOf("WINDOWS") == 0) {
        tmpFile=new File("c:\\temp");
        if(tmpFile.exists()) {
            fileLocation="c:\\temp\\";
        }
        else {
            tmpFile.mkdir();
            fileLocation="c:\\temp\\";
        }
    }
    else if (System.getProperty("os.name").toUpperCase().indexOf("WINDOWS") == -1) {
        fileLocation="/tmp/";   
    }
    return fileLocation;
}

Answer 2

Use the property java.io.tmpdir to get the tomcat temp folder and save your files there. That will be a good place to temporarily keep them in. So you can define it as follows:

public static final String TMP_DIR = System.getProperty("java.io.tmpdir")

Answer 3

Either use the property java.io.tmpdir as indicated or use the servlet context attribute javax.servlet.context.tempdir defined in the specification. For tomcat that attribute can be changed by the workDir attribute on the context.

You can use that attribute by a call to servletContext.getAttribute("javax.servlet.context.tempdir")

See tomcat documentation for detail.

Answer 4

Old question, but if there is for creating temp file why not use File.createTempFile function?

Example:

File temp = File.createTempFile("real",".howto");
temp.deleteOnExit();