后端 分页组件实例

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本文链接： https://blog.csdn.net/hebtu666/article/details/102613854

/**
 * 分页相关信息
 */
public class Page {
    //当前页码
    private int current=1;
    //显示的上限
    private int limit=10;
    //数据总数
    //用于计算页数
    private int rows;
    //路径
    private String path;

    public int getCurrent() {
        return current;
    }

    public void setCurrent(int current) {
        if (current >= 1) {
            this.current = current;
        }
    }
    public int getLimit() {
        return limit;
    }

    public void setLimit(int limit) {
        if (limit >= 1 && limit<=100) {
            this.limit = limit;
        }
    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        if(rows>=0){
            this.rows = rows;
        }
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    /**
     * 获取起始行
     * @return
     */
    public int getOffset(){
        return (current-1)*limit;
    }

    /**
     * 获取起始页码
     *
     * @return
     */
    public int getFrom() {
        int from = current - 2;
        return from < 1 ? 1 : from;
    }

    /**
     * 获取结束页码
     *
     * @return
     */
    public int getTo() {
        int to = current + 2;
        int total = getTotal();
        return to > total ? total : to;
    }
    /**
     * 获取总页数
     *
     * @return
     */
    public int getTotal() {
        // rows / limit [+1]
        if (rows % limit == 0) {
            return rows / limit;
        } else {
            return rows / limit + 1;
        }
    }
}

    @RequestMapping(path = "/index", method = RequestMethod.GET)
    public String getIndexPage(Model model, Page page) {
        // 方法调用钱,SpringMVC会自动实例化Model和Page,并将Page注入Model.
        // 所以,在thymeleaf中可以直接访问Page对象中的数据.
        page.setRows(discussPostService.findDiscussPostRows(0));
        page.setPath("/index?orderMode=" + orderMode);

        return "/index";
    }

				<!-- 分页 -->
				<nav class="mt-5" th:if="${page.rows>0}" th:fragment="pagination">
					<ul class="pagination justify-content-center">
						<li class="page-item">
							<a class="page-link" th:href="@{${page.path}(current=1)}">首页</a>
						</li>
						<li th:class="|page-item ${page.current==1?'disabled':''}|">
							<a class="page-link" th:href="@{${page.path}(current=${page.current-1})}">上一页</a></li>
						<li th:class="|page-item ${i==page.current?'active':''}|" th:each="i:${#numbers.sequence(page.from,page.to)}">
							<a class="page-link" th:href="@{${page.path}(current=${i})}" th:text="${i}">1</a>
						</li>
						<li th:class="|page-item ${page.current==page.total?'disabled':''}|">
							<a class="page-link" th:href="@{${page.path}(current=${page.current+1})}">下一页</a>
						</li>
						<li class="page-item">
							<a class="page-link" th:href="@{${page.path}(current=${page.total})}">末页</a>
						</li>
					</ul>
				</nav>