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FlyWeightFactory is responsible for creating and managing meta-units. When a client requests, the factory needs to check whether there are eligible objects in the current object pool. If so, it returns the existing object. If not, it creates a new object. FlyWeight is a superclass. When it comes to shared pools, It is easy to think of JDBC connection pooling in Java, Considering the characteristics of each connection, It is not difficult for us to sum up: Applies to several objects that are shared, They have some common attributes, Take the database connection pool as an example, url, driverClassName, username, password and dbname, these attributes are the same for each connection, so it is suitable to use the meta-sharing mode to process, build a factory class, take the above similar attributes as internal data and the others as external data, and pass them in as parameters when calling methods, thus saving space and reducing the number of instances.刘邦仍是久久的心潮澎拜，兴奋道：走吧。上海滩群雄逐鹿，江湖上风云突变！ 磅薄气势，动人心弦！ 二十年你的上海，一片繁华景象，但背后官商勾结，军阀割据，帮会分子更争名逐利，互相仇杀...... 此时，一个黄毛小子马永贞（何家劲）茫然踏进江湖路，冯着一身好武艺和一颗炽热的爱国心，与上海两大黑帮，展开一场翻天覆雨、风起云涌的龙争虎斗。与此同时，贞又遇上他生命中两个最重要的女子---京剧名伶柳菊池(俞小凡)和爱国分子段冷翠(李婉华),展开了他一生的传奇......主要讲述张氏叔侄两个好人，在高速公路上好心搭乘一名女子，第二天被公安机关以强奸杀人犯的罪名抓获。看守所关押将近一个月以后、二人无奈认罪，经过一审二审、法院最终判处二人无期徒刑。石河子检察官张红旗看出此案有疑点，并找到正义的北京律师朱智勇，经过几年的坚持、张氏叔侄终于沉冤得雪。吴必胜自小与母亲在釜山生活，母亲更在他读中学时死去，必胜唯有靠自己的能力生活。有一日，大集团的会长得知她的孙子在交通意外中死去，她唯有派秘书去找失散多年的孙子。吴必胜得知自己是会长的孙子后，便在奶奶的大卖场学习经营，并得到的辅助。必胜在那卖场与职员奉顺英相遇，并与她由冤家发展成恋人；另一方面，会长秘书的儿子，在大卖场当室长的尹哲雄亦对奉顺英有好感；而卢郁婷在教导必胜的同时，亦渐渐喜欢上必胜，四人由此展开一段复杂的四角关系……3. On the basis of satisfying 1 and 2, start to clarify the specific direction of SOC. Whether you pay attention to the security of the internal network, or worry about the attack of the external network, or care about information leakage, or asset control, or worry about the difficulty of preventing domestic thieves, etc., all need you to explore step by step. Generally speaking, with the source, what needs to be done is to implement it step by step.