SVN working copy 'XXX' locked

Phenomenon:
When using svn, the following problems occur:
update D:/Workspaces/gfcl/iTreasuryEjb/src/com/iss -r HEAD --force
    Attempted to lock an already-locked dir
svn: Working copy 'D:\Workspaces\ gfcl\iTreasuryEjb\src\com' locked.
svn: 'D:\Workspaces\gfcl\iTreasuryEjb' is already locked.

Reason:
It may be automatically locked because the last update command failed to execute.

Solution:
(1) Execute: find the project, right-click ->svn->clean up
, be careful not to open the file under the svn project at this time, otherwise the "clean up" may not be successful.
(2) If the cleanup has no effect, you have to manually delete the lock file.
Execute: "Run" -> "cmd" -> cd to the root directory of the svn project, and then execute the following command
del lock /q/s
to update again.