Java 自定義 List 分頁工具

PS: T可修改为对应的实体

rt com.google.common.collect.Lists;import java.util.Arrays;
import java.util.Collections;
import java.util.List;/*** @ClassName: MyPageHelper* @Descripution: List<T>分頁工具**/
public class MyPageHelper<T> {public List<T> splitList(List<T> list, int page, int pageSize) {if (page <= 0) {throw new IllegalArgumentException("MyPageHelper error: page number cannot be less than or equal to zero");}if (pageSize <= 0) {throw new IllegalArgumentException("MyPageHelper error: page size cannot be less than or equal to zero");}int fromIndex = (page - 1) * pageSize;if (fromIndex >= list.size()) {return Collections.emptyList();}int toIndex = fromIndex + pageSize;if (toIndex > list.size()) {toIndex = list.size();}List<List<T>> partition = Lists.partition(list.subList(fromIndex, toIndex), pageSize);return partition.isEmpty() ? null : partition.get(0);}// 測試public static void main(String[] args) {// 使用方法MyPageHelper<Integer> paginationHelper = new MyPageHelper<>();List<Integer> fullList = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);int page = 3; // 第二頁int pageSize = 4; // 每頁3條記錄List<Integer> pages = paginationHelper.splitList(fullList, page, pageSize);System.out.println(pages);}

设置 显示第三页数据，数据条数为4

int page = 3; // 第3頁
int pageSize = 4; // 每頁4條記錄

执行结果：

[9, 10]

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