利用java8 stream api 实现List集合分页获取工具

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package com.test.paging;import java.util.Arrays;import java.util.List;/** * @author kevin.chen *         Date 2017/11/9 *         Time 18:05 */public class ListPagingTest {    public static void main(String[] args) {        List<String> list = Arrays.asList("ab", "ce", "re", "asf", "saf", "abc", "111");        PagingList<String> paging = new PagingList<>(list, 2);        while (paging.hasNext()) {            paging.next().forEach(System.out::println);        }    }}

自己利用java8 stream api 实现的List集合分页获取工具分享给大家

package com.bestpay.account.core.common;import java.util.List;import java.util.stream.Collectors;/** * @author kevin.chen *         Date 2017/11/9 *         Time 18:11 *         对数据集合进分页获取 */public class PagingList<T> {    /**     * 总页数     */    private int totalPage = 0;    /**     * 当前是第几页     */    private int curPageNo = 0;    /**     * 每页的大小     */    private int pageSize = 0;    /**     * 每页默认大小     */    private static final int DEFAULT_PAGE_SIZE = 500;    private List<T> pageData = null;    public PagingList(List<T> pageResult, int pageSize) {        this.pageSize = pageSize;        this.pageData = pageResult;        init(pageResult, pageSize);    }    public PagingList(List<T> pageResult) {        this(pageResult, DEFAULT_PAGE_SIZE);    }    private void init(List<T> pageResult, int pageSize) {        if (pageSize <= 0) {            throw new IllegalArgumentException("Paging size must be greater than zero.");        }        if (null == pageResult) {            throw new NullPointerException("Paging resource list must be not null.");        }        if (pageResult.size() % pageSize > 0) {            this.totalPage = (pageResult.size() / pageSize) + 1;        } else {            this.totalPage = pageResult.size() / pageSize;        }    }    /**     * 返回当前剩余页数     *     * @return     */    private int getSurplusPage() {        if (pageData.size() % pageSize > 0) {            return (pageData.size() / pageSize) + 1;        } else {            return pageData.size() / pageSize;        }    }    /**     * 返回是否还有下一页数据     *     * @return     */    public boolean hasNext() {        return pageData.size() > 0;    }    /**     * 获取分页后，总的页数     *     * @return     */    public int getTotalPage() {        return totalPage;    }    public List<T> next() {        List<T> pagingData = pageData.stream().limit(pageSize).collect(Collectors.toList());        pageData = pageData.stream().skip(pageSize).collect(Collectors.toList());        return pagingData;    }    /**     * 返回当前页数     *     * @return     */    public int getCurPageNo() {        return totalPage - getSurplusPage();    }}

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