最病 A Behavioral Patterns a Chain of responsibility 口 Command 口 Interpreter 口| terator 口 Mediator 口 Memento 口○ oserver a State 口 Strategy 口 Template Method 口 Visitor Institute of Computer Software 2021/215 Nanjing UniversityBehavioral Patterns  Chain of Responsibility  Command  Interpreter  Iterator  Mediator  Memento  Observer  State  Strategy  Template Method  Visitor 2021/2/5 Institute of Computer Software Nanjing University 4