1.用来实现上一页下一页，我直接写到查询页面上
<%--page的分页--%>
<style type="text/css">
a {
color: #555555;
text-decoration: none;
cursor: pointer;
}
.pages a.p_pre:hover {
background-color: #eaeaea;
color: #555555;
border: 1px solid #cccccc;
}
.pages a {
height: 36px;
line-height: 36px;
overflow: hidden;
color: #666666;
font-size: 16px;
text-align: center;
display: inline-block;
padding: 0 12px;
margin: 0 4px;
border: 1px solid #cccccc;
-webkit-border-radius: 2px;
-moz-border-radius: 2px;
border-radius: 2px;
}
.pages a:hover, .pages a.cur {
color: #FFF;
background-color: #DD4E62;
border: 1px solid #DD4E62;
}
</style>
<div class="pages">
<c:if test="${pager.totalPage>=1}">
<a href="${pageContext.request.contextPath}${pager.url}&pageindex=1" class="p_pre">首页</a>
<c:if test="${pager.pageIndex>1}">
<a href="${pageContext.request.contextPath}${pager.url}&pageindex=${pager.pageIndex-1}" class="p_pre">上一页</a>
</c:if>
<c:forEach var="temp" begin="${pager.pageIndex>3?pager.pageIndex-3:1}" end="${pager.totalPage-pager.pageIndex>3?pager.pageIndex+3:pager.totalPage}" step="1">
<c:if test="${pager.pageIndex==temp}">
<a href="${pageContext.request.contextPath}${pager.url}&pageindex=${temp}" class="cur">${temp}</a>
</c:if>
<c:if test="${pager.pageIndex!=temp}">
<a href="${pageContext.request.contextPath}${pager.url}&pageindex=${temp}">${temp}</a>
</c:if>
</c:forEach>
<c:if test="${pager.pageIndex<pager.totalPage}">
<a href="${pageContext.request.contextPath}${pager.url}&pageindex=${pager.pageIndex+1}" class="p_pre">下一页</a>
</c:if>
<a href="${pageContext.request.contextPath}${pager.url}&pageindex=${pager.totalPage}" class="p_pre">尾页</a>
</c:if>
<c:if test="${pager.totalPage==0}">
<a href="#" class="cur">暂无记录</a>
</c:if>
</div>
2.遍历的方式
<c:forEach items="${pager.lists}" var="item">
<li class="w-280 m-l-13 m-r-13 bg-c-ffffff m-t-8 m-b-23 fl">
<a href="${pageContext.request.contextPath}/selectAllSys_videoByCid/${item.cid}" class="dsblock w-260 hg-140 ovhidden ">
<img src="${pageContext.request.contextPath}/jsp/front/videopic/${item.cimage}" alt=""/>
<div class="course-label">
<c:if test="${item.ctype==1}">
<label>精品视频</label>
</c:if>
<c:if test="${item.ctype!=1}">
<label>最新视频</label>
</c:if>
<%--<label>${item.ctype}</label>--%>
</div>
</a>
<div class="w-255 p-l-10 p-r-15 fl">
<div class="home_calsstxt w-200 fl">
<h3 class="w-all fs-16 ftc-000000 line-h32 one_hidden m-t-6 fl">${item.cname}</h3>
<span class="dsblock w-all fs-14 ftc-ff0000 line-h32 fl">¥${item.cprice}</span> </div>
</div>
</li>
</c:forEach>
3.工具类
package cn.dawn.util;
import java.util.List;
public class PagerInfo<T> {
private int totalPage;// 总页数
private int totalSize;// 总记录数
private int pageSize;//每页的记录数
private int pageIndex;//页码
private String url;//地址
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
private List<T> lists;
public int getTotalPage() {
//如果总记录数除以每页显示的记录数能整除，那么总页数等于商，否则商+1
int total=totalSize%pageSize==0?totalSize/pageSize:totalSize/pageSize+1;
return total;
}
public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}
public int getTotalSize() {
return totalSize;
}
public void setTotalSize(int totalSize) {
this.totalSize = totalSize;
}
public List<T> getLists() {
return lists;
}
public void setLists(List<T> lists) {
this.lists = lists;
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}
public int getPageIndex() {
return pageIndex;
}
public void setPageIndex(int pageIndex) {
this.pageIndex = pageIndex;
}
}
4.springmvc方法
/*根据搜索框查视频列表*/
@RequestMapping("/searchcourselisttocontroller")
public String searchcourselisttocontroller(Model model,Integer pageindex,String cname){
if(cname==null){
cname="";
}
try {
PagerInfo<Sys_course> pager = iCourseService.searchcourselisttocontroller(pageindex,cname);
pager.setUrl("/searchcourselisttocontroller?cname="+cname);
model.addAttribute("pager",pager);
} catch (Exception e) {
e.printStackTrace();
}
return "searchcourselist";
}
5.service层方法
@Override
public PagerInfo<Sys_course> selectAllTypeThreeSys_course(Integer pageindex) throws Exception {
int index2=pageindex==null?1:pageindex;
//分页的集合
PagerInfo<Sys_course> page=new PagerInfo<Sys_course>();
Map<String,Object> map=new HashMap<String,Object>();
map.put("pageIndex",(index2-1)*8);
map.put("pageSize",8);
List<Sys_course> lists = iCourseDAO.selectAllTypeThreeSys_course(map);
page.setLists(lists);
page.setTotalSize(iCourseDAO.selectAllTypeThreeSys_courseCount(map));
page.setPageSize(8);
page.setPageIndex(index2);
return page;
}
dao层俩个方法
<select id="selectAllTypeThreeSys_course" resultType="Sys_course">
SELECT * FROM sys_course WHERE cparent IN(SELECT c.cid AS ciddd FROM sys_course AS c WHERE cparent IN(SELECT cid FROM sys_course WHERE cparent=0)) ORDER BY ccreatetime DESC LIMIT #{pageIndex},#{pageSize}
</select>
<select id="selectAllTypeThreeSys_courseCount" resultType="int">
SELECT COUNT(1) FROM sys_course WHERE cparent IN(SELECT c.cid AS ciddd FROM sys_course AS c WHERE cparent IN(SELECT cid FROM sys_course WHERE cparent=0)) ORDER BY ccreatetime DESC
</select>
hibernate中分页怎么弄
@Test
/*
* 查询姓名中包含b的员工，并且按照薪水降序排序
* */
public void t12CriteriaPage(){
int count=((Long)session.createCriteria(Emp.class)
.add(Restrictions.ilike("name","b",MatchMode.ANYWHERE))
.setProjection(Projections.count("name")).uniqueResult()).intValue();
System.out.println(count);
//设置当前页和页大小
int pageIndex=2;
int pageSize=2;
//计算总页数
int totalPage=(count%pageSize==0)?(count/pageSize):(count/pageSize+1);
//根据薪水进行降序排序
Criteria criteria = session.createCriteria(Emp.class)
.add(Restrictions.ilike("name","b",MatchMode.ANYWHERE))
.addOrder(Order.desc("sal"));
//设置 起始页和页大小
List<Emp> emps=criteria.setFirstResult((pageIndex-1)*pageSize)
.setMaxResults(pageSize).list();
/*遍历*/
for (Emp emp:emps){
System.out.println(emp);
}
/*
Hibernate: select count(this_.name) as y0_ from Emp this_ where lower(this_.name) like ?
3
Hibernate: select this_.empId as empId1_1_0_, this_.name as name2_1_0_, this_.sal as sal3_1_0_, this_.job as job4_1_0_, this_.deptNo as deptNo5_1_0_ from Emp this_ where lower(this_.name) like ? order by this_.sal desc limit ?, ?
Hibernate: select dept0_.deptId as deptId1_0_0_, dept0_.name as name2_0_0_, dept0_.location as location3_0_0_ from Dept dept0_ where dept0_.deptId=?
Emp{empId=2, name=‘Ab‘, job=‘财务猿2‘, sal=5000.0, dept=Dept{deptId=1, name=‘xx部‘, location=‘1楼‘}}
* */
}
更简单的hibernate分页
@Test
/**
* 分页
*
* 01.查询总记录数
* 02.每页显示的数据
* 03.总页数
*/
public void t1Page(){
String hql="select count(*) from Teacher";//会返回Long类型
int counts=((Long)session.createQuery(hql).uniqueResult()).intValue();
/*页大小*/
int pageSize=2;
/*总页数*/
int totalPages=(counts%pageSize==0)?(counts/pageSize):(counts/pageSize+1);
/*显示第二页内容*/
int pageIndex=2;
hql="from Teacher";
Query query = session.createQuery(hql);;
/*从哪一条开始查*/
query.setFirstResult((pageIndex-1)*pageSize);
/*设置页大小*/
query.setMaxResults(pageSize);
List<Teacher> teachers = query.list();
for (Teacher t:teachers) {
System.out.println(t);
}
}
原文地址：https://www.cnblogs.com/DawnCHENXI/p/9236632.html
时间： 2024-08-13 01:27:38