UnaryOperator汇总

Posted 2023-05-05 郭慕荣博客园

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 package com.example.springstudy.test.functions;
 
 import cn.hutool.core.util.ReflectUtil;
 import com.example.springstudy.test.User;
 import com.google.common.collect.Lists;
 
 import java.lang.reflect.Field;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
 import java.util.function.UnaryOperator;
 
 /**
  * @Author: guodong
  * @CreateTime: 2023-05-05  16:57
  * @Description: TODO
  * @Version: 1.0
  */
 public class UnaryOperatorTest 
 
 
     // 提供数据
     public <T> void supplyData(Class<T> tClass, UnaryOperator<List<T>> unaryOperator) throws Exception 
         List<T> userList = Lists.newArrayList();
         for (int i = 1; i <= 10; i++) 
             T entityNew = (T) ReflectUtil.newInstance(tClass);
             Field[] entityNewFields = ReflectUtil.getFields(entityNew.getClass());
             for (Field field : entityNewFields) 
                 field.setAccessible(true);
                 if (field.getName().equals("id")) 
                     field.set(entityNew, Long.valueOf(i));
                  else if (field.getName().equals("age")) 
                     field.set(entityNew, i);
                  else if (field.getName().equals("name")) 
                     field.set(entityNew, UUID.randomUUID().toString());
                 
             
             userList.add(entityNew);
         
         unaryOperator.apply(userList);
     
 
 
     // 处理逻辑
     public void handleData() throws Exception 
         Optional<User> optionalUser = Optional.of(new User());
         supplyData(User.class, list -> 
             saveUserInfo(list);
             return null;
         );
     
 
     // 保存数据
     public void saveUserInfo(List<User> userList) 
         userList.stream().forEach(data -> System.out.println(data));
     
 
 
     public static void main(String[] args) throws Exception 
         UnaryOperatorTest unaryOperatorTest = new UnaryOperatorTest();
         unaryOperatorTest.handleData();