To dream that you are trying to find something in your locker means that you are trying to fill the gap in your waking life, because there is something missing in it. If you are unable to find the thing you are looking for in this locker, it means that you have some troubles that are hard to be solved, however you will find solution to it shortly. If you are getting rid of the stuff that is in this locker, it means that you are changing your life completely. If you are unable to unlock your locker because the lock is broken, or you cant find the key, then it means that you lost control of your own life.
Dream dictionary: Locker dream meanings
If you are in locker room in a dream, then such dream offers you to take some time and relax. Perhaps there is a lot of tension that is happening in your waking life. The dream could also show your desire to move on the things that are done properly instead of being in this chaos. Maybe there is someone in your life that gives you much of the stress? The dream could also denote to the desire for freedom and independency.
The safe in dreams is interpreted as your desire to protect the things that are very dear to you. If you open the safe and find it being completely empty, it means that something you will reveal will not make you satisfied.