Java redis Blur Delete key

@RunWith (springrunner.class)
@SpringBootTest public
class Redistest {
     @Autowired
    private Stringredistemplate stringredistemplate;

    @Autowired
    private redistemplate redistemplate;

    
    /**
     * Use Redis blur clear cache
    /@Test public
    void Testrediscache () {
        String keys= "Test:";
        Redistemplate.opsforvalue (). Set (Keys+1, "This is a test content!", 1000,timeunit.seconds);
        String Content=redistemplate.opsforvalue (). Get (Keys+1). toString ();
        System.out.println ("---------" gets the contents of the cache: "+content);
        " Redistemplate.delete (Redistemplate.keys (keys+ "*"));
        Object Msg=redistemplate.opsforvalue (). get (keys+1);
        if (msg==null) {
            msg= "no";
        }
        System.out.println ("---------" after the removal of the content is: "+msg);
    }

Note: The prefix to be removed should be the nearest level  eg:  key=test:aa:bb:12345 then his prefix should be test:aa:bb:*        so you can delete it.