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First of all, the simple factory mode does not belong to the 23 design modes. Simple factories are generally divided into ordinary simple factories, multi-method simple factories and static method simple factories.If you want to have first-hand information, if you don't understand any problems, if no one takes you to mix groups, you can solve the problem of locking the penguin group below. Come in 55208583-Fen!但是现在，冥河教祖对战孙悟空，这一战实在让人大开眼界。Information Change: Contact the platform to modify the information in the system before changing the CA certificate information.TCP is connection-oriented, and a connection must be established between either side before sending data to the other. In TCP/IP protocol, TCP protocol provides reliable connection service, and the connection is initialized by three-way handshake. The purpose of the three-way handshake is to synchronize the serial numbers and acknowledgement numbers of both parties and exchange TCP window size information. The process of shaking hands can be represented by the following figure