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Java is a typical object-oriented programming language, so this tutorial is based on Java to explain these 23 design patterns. If you don't know Java, please hit the "Java Tutorial" to learn.B, start redis?该剧讲述三十年代彩云之南的崇山峻岭间，家道中落的男女主人公为光复祖业误入马帮的传奇经历。GET interface is too easy to be used for CSRF attacks. Look at the first example and you will know that as long as an IMG tag is constructed, and the IMG tag is data that cannot be filtered.As the name implies, iterator pattern is to access objects in an aggregation sequentially. Generally speaking, it is very common in collections. If you are familiar with collection classes, it will be very easy to understand this pattern. This sentence contains two meanings: one is the object that needs to be traversed, that is, the aggregated object, and the other is the iterator object, which is used to traverse the aggregated object. Let's look at the diagram:115. X.X.39The second hidden page (test2):