Day2 websocket+ sort

Today's summary

1. use WebSocket It realizes the function of recording the mouse position of each online user
2. Quick sort and heap sort

WebSocket

WebSocket You can actively send or receive data to the other party , It's like Socket equally ; also WebSocket It needs to be similar TCP The client and server are connected by handshake , Only after the connection is successful can we communicate with each other , yes h5 Start by offering one in a single TCP Full duplex protocol on the connection . Consider real-time , Allow the server to send code to the client .
WebSocket The main solution is the problem of real-time communication , If http You can only use asynchronous polling . But it is inefficient and a waste of time , however WebSocket After the connection is established, it is particularly silky ,

The main method

@OnOpen： Operations during connection establishment
@OnMessage： Be able to use the received message
@OnClose： Operation when closing
At the same time, the whole process can also send information through the following code

RemoteEndpoint.Basic basicRemote = mouseMoveEndPoint.session.getBasicRemote();
basicRemote.sendText(s);

The front end I use is JQuery,

It feels very silky to accept .

The business process

First, I wrote a simple landing page （springboot Written ）, After logging in successfully, save the information session（http Of session） For the following simple judgment .
Then is WebSocket Part of , This part is actually crud, Just familiar with WebSocket Use .
Finally, the front end ,WebSocket The operation is almost the same as that of the back end , So it's still very silky ,JQeury I'm not very familiar with it .
The effect is to login in different browsers , Move the mouse to see the change of the mouse position of each browser . The video doesn't seem to play , Forget it .

Sort

I wrote fast sorting and heap sorting all night ... I'm crying , I hope I can finish all the sorting tomorrow , Then we'll sum up together .

reflection

1. The foundation is too poor , I have learned to write by dictation before fast sorting and heap sorting , As a result, I forgot it so clean after a long time … Next time you need to look at what it is before writing code , Don't read the concept again in the middle of writing , As a result, more time was wasted .
2. Today, because of writing sorting , I didn't have time to see jvm.
3. understand WebSocket after , Now I want to write a little game that you draw and I guess to practice my hand , Then I want to use socket+http Simulate a server .
4. Still too impetuous , Always can't walk, thinking of running directly , Today's sorting is … Write WebSocket Of demo It's also .
5. Linux Take it with you .