pageHelper分页

• 添加相关的依赖
• 在applicationContext中添加依赖

//服务层 serviceImpl
@Override
public List<Orders> findAll(Integer page,Integer size) throws Exception{
    PageHelper.startPage(page,size);
    return ordersDao.findAll();
}
//controller层
@Autowired
private IOrdersService iOrdersService;
@RequestMapping("/findAll.do")
public ModelAndView findAll(@RequestParam(name = "page") Integer page, @RequestParam(name = "size")Integer size) throws Exception{
    List<Orders> ordersList = iOrdersService.findAll(page,size);
    PageInfo pageInfo = new PageInfo(ordersList);
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject("pageInfo",pageInfo);
    modelAndView.setViewName("orders-list");
    return modelAndView;
}

<c:forEach items="${pageInfo.list}" var="orders">
  <tr>
    <td><input name="ids" type="checkbox"></td>
      <td>${orders.id }</td>
      <td>${orders.orderNum }</td>
      <td>${orders.product.productName }</td>
      <td>${orders.product.productPrice }</td>
      <td>${orders.orderTimeStr }</td>
      <td class="text-center">${orders.orderStatusStr }</td>
      <td class="text-center">
        <button type="button" class="btn bg-olive btn-xs">订单</button>
        <button type="button" class="btn bg-olive btn-xs" onclick="location.href='${pageContext.request.contextPath}/orders/findById.do?id=${orders.id}'">详情</button>
        <button type="button" class="btn bg-olive btn-xs">编辑</button>
      </td>
   </tr>
</c:forEach>
<div class="box-footer">
  <div class="pull-left">
    <div class="form-group form-inline">
      总共${pageInfo.pages}页，共${pageInfo.total}条数据。 每页
      <select class="form-control" id="changePageSize" onchange="changePageSize()">
        <option>1</option>
        <option>2</option>
        <option>3</option>
        <option>4</option>
        <option>5</option>
      </select> 条
    </div>
  </div>
  <div class="box-tools pull-right">
    <ul class="pagination">
      <li>
        <a href="${pageContext.request.contextPath}/orders/findAll.do?page=1&size=${pageInfo.pageSize}" aria-label="Previous">首页</a>
      </li>
      <li><a href="${pageContext.request.contextPath}/orders/findAll.do?page=${pageInfo.pageNum-1}&size=${pageInfo.pageSize}">上一页</a></li>
      <c:forEach begin="1" end="${pageInfo.pages}" var="pageNum">
        <li><a href="${pageContext.request.contextPath}/orders/findAll.do?page=${pageNum}&size=${pageInfo.pageSize}">${pageNum}</a></li>
      </c:forEach>
      <li><a href="${pageContext.request.contextPath}/orders/findAll.do?page=${pageInfo.pageNum+1}&size=${pageInfo.pageSize}">下一页</a></li>
      <li>
        <a href="${pageContext.request.contextPath}/orders/findAll.do?page=${pageInfo.pages}&size=${pageInfo.pageSize}" aria-label="Next">尾页</a>
      </li>
    </ul>
  </div>
  </div>
<!--脚本-->
<script>
  function changePageSize() {
            //获取下拉框的值
            var pageSize = $("#changePageSize").val();
            //向服务器发送请求，改变没页显示条数
            location.href = "${pageContext.request.contextPath}/orders/findAll.do?page=${pageInfo.pageNum}&size="+pageSize;
        }
<script>