java代码 数据较大的list 进行分页的一个方法,并且调用测试

以下是Java代码实现数据较大的List分页的方法：

import java.util.List;

public class ListPager<T> {
    private List<T> data;
    private int pageSize;

    public ListPager(List<T> data, int pageSize) {
        this.data = data;
        this.pageSize = pageSize;
    }

    public List<T> getPage(int pageNumber) {
        int fromIndex = (pageNumber - 1) * pageSize;
        if (fromIndex >= data.size()) {
            return null;
        }

        int toIndex = Math.min(fromIndex + pageSize, data.size());
        return data.subList(fromIndex, toIndex);
    }
}

使用示例：

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        // Mock data
        List<String> data = new ArrayList<>();
        for (int i = 1; i <= 100; i++) {
            data.add("Item " + i);
        }

        // Create pager
        ListPager<String> pager = new ListPager<>(data, 10);

        // Get page 1
        List<String> page1 = pager.getPage(1);
        System.out.println("Page 1: " + page1);

        // Get page 2
        List<String> page2 = pager.getPage(2);
        System.out.println("Page 2: " + page2);

        // Get page 3
        List<String> page3 = pager.getPage(3);
        System.out.println("Page 3: " + page3);
    }
}

输出结果：

Page 1: [Item 1, Item 2, Item 3, Item 4, Item 5, Item 6, Item 7, Item 8, Item 9, Item 10]
Page 2: [Item 11, Item 12, Item 13, Item 14, Item 15, Item 16, Item 17, Item 18, Item 19, Item 20]
Page 3: [Item 21, Item 22, Item 23, Item 24, Item 25, Item 26, Item 27, Item 28, Item 29, Item 30]