首先需要写一个PageBean对象，下面代码可直接复制。
PageBean.java
package com.hedong.page;
import java.util.List;
/**
* 分页实体类
* @author Peng
* @Date2020年2月3日 上午9:40:10
*/
public class PageBean<T> {
private int currPage;//当前页数
private int pageSize;//每页显示的记录数
private int totalCount;//总记录数
private int totalPage;//总页数
private List<T> lists;//每页的显示的数据
public PageBean() {
super();
}
public int getCurrPage() {
return currPage;
}
public void setCurrPage(int currPage) {
this.currPage = currPage;
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}
public int getTotalCount() {
return totalCount;
}
public void setTotalCount(int totalCount) {
this.totalCount = totalCount;
}
public int getTotalPage() {
return totalPage;
}
public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}
public List<T> getLists() {
return lists;
}
public void setLists(List<T> lists) {
this.lists = lists;
}
}
下面是一个将list转为pagebean对象的方法，参数为当前页数：currentPage，每页数据数目：pageSize，需要分页的list：list。
//将list转page
public static <T> PageBean<T> listTopage(int currentPage,int pageSize,List<T> list){
//页面对象
PageBean<T> pageBean = new PageBean<T>();
//封装当前页数
pageBean.setCurrPage(currentPage);
//每页显示的数据数目
pageBean.setPageSize(pageSize);
//封装总记录数
int totalCount = list.size();
pageBean.setTotalCount(totalCount);
//封装总页数
double tc = totalCount;
Double num=Math.ceil(tc/pageSize);//向上取整
pageBean.setTotalPage(num.intValue());
//封装该页list
int start=(currentPage-1)*pageSize;
if (start + pageSize > totalCount)
pageBean.setLists(list.subList(start, totalCount));
else
pageBean.setLists(list.subList(start, start + pageSize));
return pageBean;
}
然后就可以在条件查询需要的list之后调用该方法获得一个PageBean对象，该对象中就包含了这一页的所有信息，可传到前端进行展示
后端：
//留言翻页
@RequestMapping("/turnPage")
@ResponseBody
public String toturnPage(HttpServletRequest request,HttpServletResponse response,Model model) {
String successCode="1";
int currentPage=Integer.parseInt(request.getParameter("currentPage"));
int goodsid=Integer.parseInt(request.getParameter("goodsid"));
//获取评论
CommentExample commentExample=new CommentExample();
com.hedong.pojo.CommentExample.Criteria criteria=commentExample.createCriteria();
criteria.andGoodsidEqualTo(goodsid);
List<Comment> comments=commentService.selectComment(commentExample);
//将评论分页
PageBean<Comment> pagemsg=OperateController.listTopage(currentPage,1,comments);
request.getSession().setAttribute("pagemsg", pagemsg);
return successCode;
}
前端：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@page import="com.hedong.pojo.User"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>商品详情</title>
</head>
<body style="background-color: white;">
<div style="text-align: center;">
<table style="margin-top: 20px;border-collapse: collapse;" >
<c:forEach var="n" items="${pagemsg.lists}">
<tr style="text-align: center; border: 1px solid #e5e5e5;">
<td width="10%"><img src="${n.getHeadpath() }" height="50" width="50" style="margin-top: 10px;margin-bottom: 10px;"/></td>
<td width="70%">${n.getContent() }</td>
<td width="10%">${n.getUsername() }</td>
<td width="10%">${n.getCommenttime() }</td>
</tr>
</c:forEach>
</table>
<table border="0" cellspacing="0" cellpadding="0" width="900px">
<tr>
<td class="td2">
<span>第${pagemsg.currPage }/ ${pagemsg.totalPage}页</span>
<span>总记录数：${pagemsg.totalCount } 每页显示:${pagemsg.pageSize}</span>
<span>
<c:if test="${pagemsg.currPage != 1}">
<a οnclick="turnPage(1,'${specificGoods.getGoodsid() }')">[首页]</a>
<a οnclick="turnPage('${pagemsg.currPage-1}','${specificGoods.getGoodsid() }')" >[上一页]</a>
</c:if>
<c:if test="${pagemsg.currPage != pagemsg.totalPage}">
<a οnclick="turnPage('${pagemsg.currPage+1}','${specificGoods.getGoodsid() }')" >[下一页]</a>
<a οnclick="turnPage('${pagemsg.totalPage}','${specificGoods.getGoodsid() }')">[尾页]</a>
</c:if>
</span>
</td>
</tr>
</table>
</div>
</body>
</html>