dao层代码
package com.hanqi.dao; import java.util.ArrayList; import java.util.List; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.boot.registry.StandardServiceRegistryBuilder; import org.hibernate.cfg.Configuration; import org.hibernate.service.ServiceRegistry; import com.hanqi.utility.USer; public class USerDAO { private Configuration cfg = null ; private ServiceRegistry sr = null ; private SessionFactory sf = null ; private Session se = null ; Transaction ts = null ; public USerDAO() { //初始化Hibernate cfg = new Configuration().configure() ; sr = new StandardServiceRegistryBuilder().applySettings(cfg.getProperties()).build() ; } public void init() { sf = cfg.buildSessionFactory(sr) ; se = sf.openSession() ; ts = se.beginTransaction() ; } public void destory() { ts.commit() ; se.close() ; sf.close() ; } //查询列表 public List<USer> getAll(int page) { List<USer> list = new ArrayList<>() ; init() ; //设置每页两行及起始页 list = se.createQuery("from USer").setMaxResults(2) .setFirstResult((page-1)*2).list() ; destory(); return list; } }
jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="addUSer">添加用户</a>
<br><br>
<a href="selectUSer?pages=1" >用户列表</a>
</body>
</html>
<%@page import="com.hanqi.utility.USer"%> <%@page import="java.util.List"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <% List<USer> list = (List<USer>)request.getAttribute("selectuser") ; for(USer us : list ) { out.print(us + "<a href='deleteuser?user_id="+us.getUser_id()+"'> 【删除】</a>" +"<a href='modify?userid="+us.getUser_id()+"'> 【修改】</a>" +"<br>") ; } int pages = Integer.parseInt(request.getParameter("pages")) ; %> <% if(list.size()==0){response.getWriter().write("页码超出范围") ; response.setHeader("refresh", "3;url=selectUSer?pages=1") ;}else{ %> <%%> <a href="selectUSer?pages=<%=pages-1%>">上一页</a> <a href="selectUSer?pages=<%=pages+1%>">下一页</a> <%} %> </body> </html>
Struts文件配置
<!-- 查询全部 -->
<action name="selectUSer" class="com.hanqi.action.USerAction" method="selectUSer">
<result name="fail">/WEB-INF/pages/fail.jsp</result>
<result name="success">/WEB-INF/pages/selectUSer.jsp</result>
</action>
service层方法
public String selectUSer() { String rtn = "fail" ; try {//得到原生request HttpServletRequest hsr = ServletActionContext.getRequest() ; int page = Integer.parseInt(hsr.getParameter("pages")) ; //page = Integer.parseInt(hsr.getParameter("pagess")) ; //调用查询的方法 List<USer> list = new UserService().getAll(page); hsr.setAttribute("pages", page+1); hsr.setAttribute("selectuser", list); rtn = "success" ; }catch(Exception e) { e.printStackTrace(); } return rtn; }