Various simple implementation programs for obtaining the current directory in jsp

1. Use the System. getProperty () function to obtain the current path:

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System. out. println (System. getProperty ("user. dir"); // user. dir specifies the current path.

2. Use the function provided by File to obtain the current path:

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File directory = new File (""); // Set it to the current folder Try { System. out. println (directory. getCanonicalPath (); // Obtain the standard path. System. out. println (directory. getAbsolutePath (); // Obtain the absolute path. } Catch (shorttin e ){}

File. getCanonicalPath () and File. getAbsolutePath () are only different for new File (".") and new File.

# For the getCanonicalPath () function, "." indicates the current folder, and ".." indicates the upper-level folder of the current folder.
# For the getAbsolutePath () function, no matter "." or ".", the current path is returned and the path you set when new File () is added.
# As for the getPath () function, all you get is the path you set in new File ().

For example, the current path is C: test:

The code is as follows:

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File directory = new File ("abc "); Directory. getCanonicalPath (); // C: testabc Directory. getAbsolutePath (); // C: testabc Direcotry. getPath (); // abc is returned. File directory = new File ("."); Directory. getCanonicalPath (); // C: test Directory. getAbsolutePath (); // The C: test. Direcotry. getPath (); // The result is. File directory = new File (".."); Directory. getCanonicalPath (); // C: Directory. getAbsolutePath (); // The C: test .. Direcotry. getPath (); // The result is ..

Obtains the current working directory of the JAVA program.

File file = new File ("t. tmp ");
String fullpath = file. getAbsolutePath ();

1. request. getRealPath

Method: request. getRealPath ("/")
Path: C: Program FilesApache Software FoundationTomcat 5.5 webjavasstrutstest

Method: request. getRealPath (".")
Path: C: Program FilesApache Software FoundationTomcat 5.5web+strutstest.

Method: request. getRealPath ("")
Path: C: Program FilesApache Software FoundationTomcat 5.5 webjavasstrutstest

Request. getRealPath ("web. xml ")
C: Program FilesApache Software FoundationTomcat 5.5web#strutstestweb.xml

2. request. getParameter ("");
ActionForm. getMyFile ();

Method: String filepath = request. getParameter ("myFile ");
Path: D: vssinstallation directory users.txt

Method: String filepath = ActionForm. getMyFile ();
Path: D: vssinstallation directory users.txt