PageHelper插件实现服务器端分页功能
人气:0一、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>
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