打字猴:1.7004838e+09
1700483800 public static void main(String[]args){
1700483801
1700483802 //首先初始化一批用户
1700483803
1700483804 ArrayList<User>userList=new ArrayList<User>();
1700483805
1700483806 userList.add(new User(“苏大”,3));
1700483807
1700483808 userList.add(new User(“牛二”,8));
1700483809
1700483810 userList.add(new User(“张三”,10));
1700483811
1700483812 userList.add(new User(“李四”,15));
1700483813
1700483814 userList.add(new User(“王五”,18));
1700483815
1700483816 userList.add(new User(“赵六”,20));
1700483817
1700483818 userList.add(new User(“马七”,25));
1700483819
1700483820 userList.add(new User(“杨八”,30));
1700483821
1700483822 userList.add(new User(“侯九”,35));
1700483823
1700483824 userList.add(new User(“布十”,40));
1700483825
1700483826 //定义一个用户查询类
1700483827
1700483828 IUserProvider userProvider=new UserProvider(userList);
1700483829
1700483830 //打印出年龄大于20岁的用户
1700483831
1700483832 System.out.println(”===年龄大于20岁的用户===”);
1700483833
1700483834 //定义一个规格书
1700483835
1700483836 IUserSpecification userSpec=new UserByAgeThan(20);
1700483837
1700483838 for(User u:userProvider.findUser(userSpec)){
1700483839
1700483840 System.out.println(u);
1700483841
1700483842 }
1700483843
1700483844 }
1700483845
1700483846 }
1700483847
1700483848 在场景类中定义了一个规格书,然后把规格书提交给UserProvider就可以查找到自己需要的用户了,运行结果相同,不再赘述。
1700483849
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