PageHelper插件实现服务器端分页功能

时间：2021-05-20

本文实例为大家分享了PageHelper插件实现服务器端分页功能，供大家参考，具体内容如下

一、添加依赖

在.pom文件中添加

<dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>3.5.1</version></dependency>

二、添加配置/strong>

在spring-mybaits.xml文件中添加插件

<!-- mybatis和spring完美整合，不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!-- 自动扫描mapping.xml文件 --> <property name="mapperLocations" value="classpath:mapping/*.xml"></property> <!--分页插件--> <property name="plugins"> <array> <bean class="com.github.pagehelper.PageHelper"> <property name="properties"> <value> dialect=mysql reasonable=true </value> </property> </bean> </array> </property> <!--分页--></bean>

三、controller代码

//分页展示用户 @RequestMapping(value = "/user.do") public ModelAndView test1(HttpServletRequest request, HttpServletResponse response, ModelMap mode) throws Exception { ModelAndView modelAndView = new ModelAndView(); int pageNumber = 1; try{ if(request.getParameter("pageNow").equals(null)){ System.out.println("参数空"); }else { pageNumber = Integer.parseInt(request.getParameter("pageNow")); } }catch (Exception e){ //处理空针错误 } System.out.println("请求参数"+request.getParameter("pageNow")); PageInfo<user> pageInfo = userService.selectUserByPage(pageNumber,5);// Map<String, Object> map = new HashMap<String, Object>();// List<Object> data = new ArrayList<Object>();// for(user admin : pageInfo.getList()){// Map<String, Object> obj = new HashMap<String, Object>();// obj.put("id", admin.getId());// obj.put("username", admin.getUsername());// obj.put("password", admin.getPassword());// obj.put("enable", admin.getEnable());// obj.put("id_card", admin.getIdCard());// obj.put("phone", admin.getPhone());// obj.put("address", admin.getAddress());// obj.put("nick_name", admin.getAddress());// data.add(obj);// } modelAndView.addObject("pageInfo",pageInfo); //jsp 根据users来传递信息 System.out.println("成功啦"); modelAndView.setViewName("/test/user"); return modelAndView; }

四、Service方法

//分页获取用户信息public PageInfo<User> selectUserByPage(Integer pageNum, Integer pageSize) { PageHelper.startPage(pageNum, pageSize); // 所有用户信息 List<User> authAdmins = userMapper.selectUsers(); if(authAdmins == null){ return null; } PageInfo<User> pageInfo = new PageInfo<User>(authAdmins); return pageInfo;}

五、jsp显示

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><%-- Created by IntelliJ IDEA. User: Administrator Date: 2017/12/2 0002 Time: 11:10 To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>user</title></head><body><h1>User</h1><table> <c:forEach items="${pageInfo.list}" var="u"> <%--属性值映射mapper 中的property--%> <tr> <td>${u.id}</td> <td>${u.username}</td> <td>${u.password}</td> <td>${u.enable}</td> <td>${u.idCard}</td> <td>${u.phone}</td> <td>${u.address}</td> <td>${u.nickName}</td> </tr> </c:forEach> <tr> <td colspan="6"> <!-- 分页功能 start --> <div align="center"> <font size="2">共 ${pageInfo.pageSize} 页</font> <font size="2">第 ${pageInfo.pageNum} 页</font> <a href="${pageContext.request.contextPath}/user.do?pageNow=1" rel="external nofollow" rel="external nofollow" >首页</a> <c:choose> <c:when test="${pageInfo.pageNum - 1 > 0}"> <a href="${pageContext.request.contextPath}/user.do?pageNow=${pageInfo.pageNum - 1}" rel="external nofollow" >上一页</a> </c:when> <c:when test="${pageInfo.pageNum - 1 <= 0}"> <a href="${pageContext.request.contextPath}/user.do?pageNow=1" rel="external nofollow" rel="external nofollow" >上一页</a> </c:when> </c:choose> <%--pageSize共 页--%> <%--pageNum 第 页--%> <%--pagetotal 共 条--%> <c:choose> <c:when test="${pageInfo.pageSize==0}"> <a href="${pageContext.request.contextPath}/user.do?pageNow=${pageInfo.pageNum}" rel="external nofollow" >下一页</a> </c:when> <c:when test="${pageInfo.pageNum + 1 < pageInfo.pageSize}"> <a href="${pageContext.request.contextPath}/user.do?pageNow=${pageInfo.pageNum + 1}" rel="external nofollow" >下一页</a> </c:when> <c:when test="${pageInfo.pageNum + 1 >= pageInfo.pageSize}"> <a href="${pageContext.request.contextPath}/user.do?pageNow=${pageInfo.pageSize}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a> </c:when> </c:choose> <c:choose> <c:when test="${pageInfo.pageSize==0}"> <a href="${pageContext.request.contextPath}/user.do?pageNow=${pageInfo.pageSize}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a> </c:when> <c:otherwise> <a href="${pageContext.request.contextPath}/user.do?pageNow=${pageInfo.pageSize}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a> </c:otherwise> </c:choose> </div> <!-- 分页功能 End --> </td> </tr> <%--<tr>--%> <%--<td>${data.username}</td>--%> <%--<td>${data.password}</td>--%> <%--</tr>--%></table></body></html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

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