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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ~~~ // 創建對象的方式 // 1.直接new Person p=new Person(); // 2.匿名對象 new Person(); // 3.全路徑 cn.li.lesson1.Person p=new cn.li.lesson1.Person(); // 4.反射 Class.forName("cn.li.lesson1.Person").newInstance(); // 通過springIOC容器來創建對象 //ApplicationContext是一個接口 //SpringIOC容器來裝對象的,管理對象的生命周期 ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml"); //使用java反射來實現。并且默認是單例模式來幫我們創建對象的。 //1.通過id Person p1 = (Person) ac.getBean("p1"); System.out.println(p1); Person p2 = (Person) ac.getBean("p1"); System.out.println(p2); //2.通過反射(xml文件中不能有兩個Person對象) // Person bean = ac.getBean(Person.class); // System.out.println(bean); ~~~
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