分页查询功能

Posted 2021-09-29 江湖@小小白

前端页面遍历数据

 <div>
        <nav aria-label="Page navigation">
            <ul class="pagination">
                <c:if test="${pb.currentPage == 1}">
                <li class="disabled">
                    </c:if>

                    <c:if test="${pb.currentPage != 1}">
                <li>
                    </c:if>
                    <a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage - 1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Previous">
                        <span aria-hidden="true">&laquo;</span>
                    </a>
                </li>

                <c:forEach begin="1" end="${pb.totalPage}" var="i" >

                    <c:if test="${pb.currentPage == i}">
                        <li class="active"><a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${i}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}">${i}</a></li>
                    </c:if>
                    <c:if test="${pb.currentPage != i}">
                        <li><a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${i}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}">${i}</a></li>
                    </c:if>

                </c:forEach>

                <li>
                    <a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage + 1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Next">
                        <span aria-hidden="true">&raquo;</span>
                    </a>
                </li>
                <span style="font-size: 25px;margin-left: 5px;">
                    共${pb.totalCount}条记录，共${pb.totalPage}页
                </span>
            </ul>
        </nav>
    </div>

1. 创建分页对象_zfyTest\\src\\com\\zfy\\domain\\PageBean.java

2. FindUserByPageServlet.java

1. 接收请求参数：currentPage，rows
2. 调用 Service 查询 PageBean
3. 将 PageBean 存入 request
4. 转发 list.jsp

3. UserService.java

1. 创建空的 PageBean 对象
2. 设置当前页面属性和 rows 属性
3. 调用 dao 查询 totalCount 总记录数——dao.findTotalCount();
4. start = (currentPage - 1) * rows;
5. 调用 dao 查询 list 集合——dao.findByPage(int start,int rows);
6. 计算总页码
7. 返回这个 PageBean 对象

4. UserDao.java

源代码上传中…