1、实体层
package com.eccap.es.model; import java.util.List; /** * 分页信息 * * @author chaohui.yan * @date 2019-06-10 * */ public class Pagefenye<T> { // 你页面需要展示的集合 private List<T> list; // 总页数 private int totalPage; // 当前页 private int currentPage; // 每页显示的数目 (为了防止硬编码可以写在配置文件中) private int pageSize; public Pagefenye(int totalNum, int currentPage, int pageSize, int pageNo) { this.currentPage = currentPage; this.pageSize = pageSize; /*this.pageNo = pageNo;*/ // 计算总页数 if (totalNum % this.pageSize == 0) this.totalPage = totalNum / this.pageSize; else this.totalPage = (totalNum / this.pageSize) + 1; } public List<T> getList() { return list; } public void setList(List<T> list) { this.list = list; } public int getTotalPage() { return totalPage; } public void setTotalPage(int totalPage) { this.totalPage = totalPage; } public int getCurrentPage() { return currentPage; } public void setCurrentPage(int currentPage) { this.currentPage = currentPage; } public int getPageSize() { return pageSize; } public void setPageSize(int pageSize) { this.pageSize = pageSize; } }
2、Dao层select * from 表名 查询
3、service层
@Autowired private EsEntPermitManager esEntPermitManager; public Pagefenye<T> findAllUsersByPage(int currentPage, int pageSize) { List<T> users =“调用查询方法”;//esEntPermitManager.fenye(); Pagefenye<T> pageInfo = new Pagefenye<>(users.size(), currentPage, pageSize, 5); //判断是否是最后一页,如果最后一页就显示最后一页的几条,不是最后一页就显示pageSize条 if(currentPage==pageInfo.getTotalPage()) pageInfo.setList(users.subList((currentPage-1)*pageSize, users.size())); else { pageInfo.setList(users.subList((currentPage-1)*pageSize, (currentPage-1)*pageSize+pageSize)); } return pageInfo; }
4、controller层
public String Pagefenye() { //接收当前页 String pageNo = this.getParameter("pageNo"); //String 转 int int isd = Integer.parseInt(pageNo); String stg = null; //调用业务层方法并传入当前页,每页展示多少条 Pagefenye<T> list = pagefenyeManager.findAllUsersByPage(isd,100); try { //获取查询结果转为json并展示空值 stg = JSON.toJSONString(list,SerializerFeature.PrettyFormat, SerializerFeature.WriteMapNullValue); System.out.println(stg); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return stg.toString(); }