java中對list分頁並顯示數據到頁面實例代碼

有時候需要根據條件查詢得出的數據較多，需要分頁顯示到頁面上。這時點擊下一頁就不方便每次帶查詢條件在數據庫中分頁。可以在list中進行分頁。

page的model類：

 public class Page { private Integer currentPage;//當前頁private int pageSize;//每頁顯示記錄條數private int totalPage;//總頁數private List<?> dataList;//每頁顯示的數據private int star;//開始數據public Integer getCurrentPage() { return currentPage; } public void setCurrentPage(Integer currentPage) { this.currentPage = currentPage; } public int getPageSize() { return pageSize; } public void setPageSize(int pageSize) { this.pageSize = pageSize; } public int getTotalPage() { return totalPage; } public void setTotalPage(int totalPage) { this.totalPage = totalPage; } public List<?> getDataList() { return dataList; } public void setDataList(List<?> dataList) { this.dataList = dataList; } public int getStar() { return star; } public void setStar(int star) { this.star = star; } }

控制層：

 @RequestMapping("fenye.do") public String fen(Page page,HttpServletRequest request){ try { //查詢出的list數據List<Data> showdata=loginService.selectyichall(); //剛開始的頁面為第一頁if (page.getCurrentPage() == null){ page.setCurrentPage(1); } else { page.setCurrentPage(page.getCurrentPage()); } //設置每頁數據為十條page.setPageSize(10); //每頁的開始數page.setStar((page.getCurrentPage() - 1) * page.getPageSize()); //list的大小int count = showdata.size(); //設置總頁數page.setTotalPage(count % 10 == 0 ? count / 10 : count / 10 + 1); //對list進行截取page.setDataList(showdata.subList(page.getStar(),count-page.getStar()>page.getPageSize()?page.getStar()+page.getPageSize():count)); //設置作用域request.setAttribute("paging", page); return "add/show.jsp"; } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); return "mistake.jsp"; } }

jsp頁面：

 <script type="text/javascript" language="javascript"> function goPage(page){ location.href="fenye.do?currentPage=" rel="external nofollow" +page; } </script> <div> <table align="center" cellspacing="1" > <c:forEach items="${paging.dataList }" var="upl"> <tr> <td align="center">${upl.name1 }</td> <td align="center">${upl.name2 }</td> <td align="center">${upl.name3 }</td> </tr> </c:forEach> </table> </div> <div style="text-align:center; margin-top:10px;color: white;" id="venderfen"> <c:if test="${paging.totalPage > 0}"> 當前第${paging.currentPage } 頁/共${paging.totalPage} 頁</c:if> <c:if test="${paging.totalPage > 1}"> <c:choose> <c:when test="${paging.currentPage==2 && paging.totalPage==2}"> <a onclick="goPage(1)">首頁</a> <a onclick="goPage(${paging.currentPage-1})">上一頁</a> </c:when> <c:when test="${paging.currentPage==1}"> <a onclick="goPage(${paging.currentPage+1})">下一頁</a> <a onclick="goPage(${paging.totalPage})">末頁</a> </c:when> <c:when test="${paging.currentPage==paging.totalPage}"> <a onclick="goPage(1)">首頁</a> <a onclick="goPage(${paging.currentPage-1})">上一頁</a> </c:when> <c:otherwise> <a onclick="goPage(1)">首頁</a> <a onclick="goPage(${paging.currentPage-1})">上一頁</a> <a onclick="goPage(${paging.currentPage+1})">下一頁</a> <a onclick="goPage(${paging.totalPage})">末頁</a> </c:otherwise> </c:choose> </c:if> 共${paging.total} 條</div>

 StringBuilder sb = new StringBuilder(); sb.append("SELECT distinct(m.time) "); sb.append(" from tbl_monitor m left join tbl_variable v on m.variable = v.id "); sb.append(" left join tbl_variable_group g on v.variable_group = g.id "); sb.append(" where v.active = true and g.active=true "); //sb.append(" AND m.variable in " + variableIds); sb.append(" AND exists ( select vtemp.id from tbl_variable vtemp where vtemp.selected=true and vtemp.id=m.variable)"); sb.append(" AND m.time between " + beginTime + " AND " + endTime ); sb.append(" order by m.time asc"); Query query = em.createNativeQuery(sb.toString()); //滿足搜索條件的所有的時間的條數int total = query.getResultList().size(); tableView.setTotal(total); tableView.setTotalPage(total % page.getPageSize() == 0 ? total / page.getPageSize() : (total / page.getPageSize()) + 1); query.setFirstResult(from); query.setMaxResults(offset); timeList = query.getResultList();

總結

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