SSM项目使用pageHelper分页插件

其他 2018-06-22 16:13:31 阅读次数: 3
1. 下载JAR包

分页插件pagehelper.jar：

https://oss.sonatype.org/content/repositories/releases/com/github/pagehelper/pagehelper/ 
http://repo1.maven.org/maven2/com/github/pagehelper/pagehelper/ 
由于使用了sql解析工具，你还需要下载jsqlparser.jar

4.1.0及以后版本需要0.9.4版本

http://repo1.maven.org/maven2/com/github/jsqlparser/jsqlparser/0.9.4/ 
4.1.0以前版本需要0.9.1版本

http://repo1.maven.org/maven2/com/github/jsqlparser/jsqlparser/0.9.1/

2.在spring-mybatis添加配置

    <!-- spring和MyBatis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:cxc/hotel/mapping/*.xml"></property>
        <!-- 引入分页插件 -->
       <property name="plugins">
    	<array>
     	 <bean class="com.github.pagehelper.PageInterceptor">
     	 	 <property name="properties">
          <!-- config params as the following -->
          <value>
            helperDialect=oracle
          </value>
        </property>
         </bean>
    	</array>
 	   </property> 
    </bean>

注意:不能少<value>，我写的时候少了，就一直报错，找了很久才发现是自己写掉了

3.建立所需要的类：

1）页面上查询信息封装的实体类：QueryRecord.java

package cxc.hotel.entity;

import java.io.Serializable;
import java.util.Date;

/*
 * 用于封装查询登录信息的实体类
 */
public class QueryRecord implements Serializable{//实体类中尽量使用包装类，如果返回字段值为null，int类型会报错，Integer不会报错
	private static final long serialVersionUID = 8460668120409851975L;
	private String username;//操作员用户名
	private Date startTime;
	private Date endTime;
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public Date getStartTime() {
		return startTime;
	}
	public void setStartTime(Date startTime) {
		this.startTime = startTime;
	}
	public Date getEndTime() {
		return endTime;
	}
	public void setEndTime(Date endTime) {
		this.endTime = endTime;
	}
	@Override
	public String toString() {
		return "QueryRecord [username=" + username + ", startTime=" + startTime
				+ ", endTime=" + endTime + "]";
	}
	
	
	
}

2）查询的每一条结果封装的实体类：

package cxc.hotel.entity;

import java.io.Serializable;
import java.util.Date;

/*
 * 操作员登录信息实体类
 */
public class LoginRecord implements Serializable{//实体类中尽量使用包装类，如果返回字段值为null，int类型会报错，Integer不会报错
	private static final long serialVersionUID = 8460668120409851985L;
	private Integer id;//操作员id
	private String username;//操作员用户名
	private String loginip;//登录ip
	private Date logintime;//登录的时间
	
	public LoginRecord(){
	}
	public LoginRecord(Integer id, String username, String loginip,Date logintime) {
		super();
		this.id = id;
		this.username = username;
		this.loginip = loginip;
		this.logintime = logintime;
	}
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getLoginip() {
		return loginip;
	}
	public void setLoginip(String loginip) {
		this.loginip = loginip;
	}
	public Date getLogintime() {
		return logintime;
	}
	public void setLogintime(Date logintime) {
		this.logintime = logintime;
	}
	@Override
	public String toString() {
		return "LoginRecord [id=" + id + ", username=" + username
				+ ", loginip=" + loginip + ", logintime=" + logintime + "]";
	}
	
}

3).持久层--->控制层

3.1)FindLoginRecordMapper.xml

<?xml version="1.0" encoding="UTF-8" ?> 
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 
<mapper namespace="cxc.hotel.dao.FindLoginRecordDao" >
<resultMap id="BaseResultMap" type="cxc.hotel.entity.LoginRecord" > 
<id property="id" column="id" jdbcType="INTEGER" /> <!-- 前面是实体类的字段，后面是数据库的字段，一一对应 -->
<result property="username" column="username" jdbcType="VARCHAR" /> 
<result property="loginip" column="loginip" jdbcType="VARCHAR" />  
<result property="logintime" column="logintime" jdbcType="DATE" /> 
</resultMap>
<!-- 将查询的结果分页处理 -->
<select id="LoginRecordPageInfo" resultMap="BaseResultMap" parameterType="cxc.hotel.entity.QueryRecord">
	select * from tb_loginrecored 
	where 1=1
	 <if test="username!='' and username!=null">
		AND username LIKE concat(concat('%',#{username}),'%')
	</if> 
	 <if test="startTime!='' and startTime!=null">
		AND logintime >=#{startTime}
	</if>
	<if test="endTime!='' and endTime!=null">
		AND logintime <=#{endTime}
	</if>
	order by logintime desc
		
</select>

</mapper>

注意：1）在mapper.xml中,>是&gt；，<是&lt;----------2）在oracle数据库中不支持concat的三个参数的拼接，故使用三个参数用上面的方式

3.2）FindLoginRecordDao.java

package cxc.hotel.dao;

import java.util.Date;
import java.util.List;

import org.apache.ibatis.annotations.Param;

import cxc.hotel.entity.LoginRecord;
import cxc.hotel.entity.QueryRecord;
public interface FindLoginRecordDao {
	/** 方法名 与  UserMapper.xml 文件中的 sql语句的 id 相同*/
	/**该方法用于查询登录记录*/
	List<LoginRecord> LoginRecordPageInfo(QueryRecord queryRecord);
}

3.3）LoginRecordService.java

package cxc.hotel.service;

import com.github.pagehelper.PageInfo;

import cxc.hotel.entity.LoginRecord;
import cxc.hotel.entity.QueryRecord;



public interface LoginRecordService {
	//得到登录记录的分页信息，查询信息封装成的一个对象，当前页数，每页多少条
	public PageInfo<LoginRecord> getLoginRecordPageInfo(QueryRecord queryRecord,Integer currentPage,Integer pageSize);
	
}

3.4）LoginRecordServiceImpl.java

package cxc.hotel.service.impl;

import java.util.Date;
import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;

import cxc.hotel.dao.FindLoginRecordDao;
import cxc.hotel.entity.LoginRecord;
import cxc.hotel.entity.QueryRecord;
import cxc.hotel.service.LoginRecordService;

@Service
public class LoginRecordServiceImpl implements LoginRecordService{
	//得到登录记录的分页信息，查询信息封装成的一个对象，当前页数，每页多少条
	@Resource
	private FindLoginRecordDao findLoginRecorddao;
	//传入的三个参数，查询的条件，第几页，每页多少条数据
	public PageInfo<LoginRecord> getLoginRecordPageInfo(QueryRecord queryRecord,Integer currentPage,Integer pageSize){
		//第几页，每页多少条数据
		PageHelper.startPage(currentPage,pageSize);
		//1.根据条件查询所有满足查询条件的结果集
		List<LoginRecord> list=findLoginRecorddao.LoginRecordPageInfo(queryRecord);
		PageInfo<LoginRecord> pageInfo=new PageInfo<LoginRecord>(list);
		//2.把查询出来的结果集封装成PageInfo对象
		return	pageInfo;
	}
	
}

3.5）LoginUserController.java

@Controller  
@RequestMapping("/user")
public class LoginUserController {
@Resource
	private LoginRecordService loginRecordService;
//该方法用于form表单提交 Date类型数据绑定 
	@InitBinder    
	public void initBinder(WebDataBinder binder) { 
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");    
		dateFormat.setLenient(false);    
		binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));    
	}
	
	//该方法用于管理员查询用户的登录记录
	@RequestMapping(value = "/userRecord")
	public String userRecord(HttpServletRequest request,Model model,QueryRecord queryRecord) throws Exception {
		String page = request.getParameter("currentPage");
		if (StringUtils.isEmpty(page)) {
			page = "1";
		}
		//LoginUser user = (LoginUser) SecurityUtils.getSubject().getSession().getAttribute("currentUser");
		PageInfo<LoginRecord> pageInfo = null;
		pageInfo = loginRecordService.getLoginRecordPageInfo(queryRecord,Integer.parseInt(page),SystemConstant.PageSize.PAGESIZE_10);
		model.addAttribute("queryRecord",queryRecord);
		//model.addAttribute("user", user);
		model.addAttribute("pageInfo", pageInfo);
		return "userRecord";
	}
}

4.userRecord.jsp

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ include file="/WEB-INF/jsp/taglib.jsp"%>
<%@ taglib prefix="p" uri="/WEB-INF/page.tld"%>
<script type="text/javascript"> var ctx = "${ctx}";</script><!-- 方便后面使用，直接使用ctx即可 -->
<script src="${ctx}/script/jquery-1.11.1.js"></script>
<script src="${ctx}/script/jquery.json-2.4.min.js"></script>
<script src="${ctx}/script/My97DatePicker/WdatePicker.js"></script><!-- 引入时间插件 -->
<!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>便捷酒店管理系统</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0"> 
        <link rel="stylesheet" type="text/css" href="${ctx}/style/middle.css" />
</head>
<body >
        <div class="container" >
            <div class="codrops-top">
                <a href="">
                    <strong>点击刷新当前页面 </strong>
                </a>
                <span class="right">
                    <a href="https://blog.csdn.net/qq_39986274/">
                        <strong>跳转到开发者博客</strong>
                    </a>
                </span>
                <div class="clr"></div>
            </div>
 			<form:form  modelAttribute="queryRecord" class="form" id="userForm" action="${ctx}/user/userRecord.do"  method="post"
 			style="height: 420px;width: 900px; color:#ffffff;">
          	<div>	用户名：
          			<form:input id="username" path="username" type="text" style="width: 120px;" />
          			起始日期：
					<!-- <input  type="text" class="Wdate" id="startTime" 
					onClick="WdatePicker({autoPickDate:true,dateFmt:'yyyy-MM-dd',maxDate:'#F{$dp.$D(\'endTime\')||\'new Date()\'}',readOnly:true})" style="width: 120px;"/> -->
					
					<form:input id="startTime" path="startTime" style="width: 120px;" class="Wdate" />
					截止日期：
					<!-- <input  type="text"  class="Wdate" id="endTime" 
					onClick="WdatePicker({autoPickDate:true,dateFmt:'yyyy-MM-dd',minDate:'#F{$dp.$D(\'startTime\')}',maxDate:new Date(),readOnly:true})" style="width: 120px;"/> -->
					
					<form:input id="endTime" path="endTime" style="width: 120px;" class="Wdate" /> 
					       
					<input type="button" class="btn"  id="queryButton" value="点击查询" />
			</div>
			<br/>
				<table class="welcometable" id="tb" width="850px" >
					<tr height="30px" >
						<td width="180px"  rowspan="12" align="center" >登录记录</td>
						<th width="200px"> 用户名</th>
						<th width="260px"> 登录时间</th>
						<th width="210px"> 登录IP</th>
						<th width="150px" > 登录次数</th>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[0].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[0].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[0].loginip}</td>
						<td rowspan="10" align="center">${pageInfo.getTotal()}次</td>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[1].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[1].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[1].loginip}</td>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[2].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[2].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[2].loginip}</td>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[3].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[3].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[3].loginip}</td>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[4].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[4].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[4].loginip}</td>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[5].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[5].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[5].loginip}</td>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[6].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[6].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[6].loginip}</td>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[7].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[7].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[7].loginip}</td>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[8].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[8].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[8].loginip}</td>
					</tr>
					<tr height="28px">
						<td> ${pageInfo.list[9].username}</td>
						<td> <fmt:formatDate value="${pageInfo.list[9].logintime}" pattern="yyyy-MM-dd HH:mm:ss" /></td>
						<td> ${pageInfo.list[9].loginip}</td>
					</tr>
					<tr height="50px" >
						<td colspan="4">
							<!-- 自定义p标签，用于分页 -->
							<div class="c m_t20">
								<p:cxc> </p:cxc>
							</div>
					</td>
					</tr>
				</table>	
			</form:form>​​
        </div>
    </body>
    <footer class="main-footer" >
    <strong height="10px">Copyright &copy; 2018-2020 <a href="https://blog.csdn.net/qq_39986274/">程绪才</a>.</strong>
    ------------------------------------------------
    All rights reserved.
    ------------------------------------------------------------
    <b height="10px">Version</b> 1.0
  </footer>
</html>

<script language="javascript" type="text/javascript">
$(function() {
	$("#startTime").bind("click", {
		'startId' : 'startTime',
		'endId' : 'endTime'
	}, dateStart);
	$("#endTime").bind("click", {
		'startId' : 'endTime',
		'endId' : 'startTime'
	}, dateEnd);
})
function dateStart(obj) {
		var sId = obj.data.startId;
		var eId = obj.data.endId;
		var maxda = "";
		if ($("#" + eId).val() == "") {
			maxda = '%y-%M-%d';
		} else {
			maxda = '#F{$dp.$D(\'' + eId + '\')}';
		}
		WdatePicker({
			el : sId,
			autoPickDate : true,
			minDate : '#F{$dp.$D(\'' + eId + '\',{d:-30});}',
			maxDate : maxda,
			dateFmt : 'yyyy-MM-dd'
		});
	}

	//结束时间
	function dateEnd(obj) {
		var Id = obj.data.startId;
		var eId = obj.data.endId;
		var maxda = "";

		if ($("#" + eId).val() != "" && DateDiff($("#" + eId).val())) {
			maxda = '#F{$dp.$D(\'' + eId + '\',{d:+30});}';
		} else {
			maxda = '%y-%M-%d';
		}
		WdatePicker({
			el : Id,
			autoPickDate : true,
			minDate : '#F{$dp.$D(\'' + eId + '\')}',
			maxDate : maxda,
			dateFmt : 'yyyy-MM-dd'
		});
	}
	function DateDiff(str1) {
		var date1 = str1.split("-");

		var strDate1 = new Date(date1[0], date1[1] - 1, date1[2]);
		var strDate2 = new Date();// 当前时间

		return (strDate2.getTime() - strDate1.getTime()) / 1000 / 60 / 60 / 24 > 30;
	}
$(function(){
	$("#queryButton").bind("click", query);
	})
function query() {
	$("#userForm").submit();
	}
function formSubmit() {
	query();
}
</script>

该处时间插件自行在网上下载

5.page.tld

<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
	version="2.0">
	<description>cxc page tag</description>
	<display-name>page tag</display-name>
	<tlib-version>1.0</tlib-version>
	<short-name>cxc</short-name>
	<tag>
		<name>cxc</name>
		<tag-class>cxc.hotel.entity.PageTag</tag-class>
		<body-content>JSP</body-content>
		<attribute>
			<name>formIndex</name>
			<required>false</required>
			<rtexprvalue>true</rtexprvalue>
		</attribute>
	</tag>
</taglib>

6.PageTag.java

package cxc.hotel.entity;

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;

import com.github.pagehelper.PageInfo;


public class PageTag extends TagSupport {
	private static final long serialVersionUID = 5678672299634741305L;

	private Long formIndex = 0L;// 表单索引

	@Override
	public int doAfterBody() throws JspException {
		return TagSupport.SKIP_BODY;
	}

	@Override
	public int doStartTag() throws JspException {
		try {
			PageInfo pageInfo = new PageInfo();

			Object page = pageContext.getRequest().getAttribute("pageInfo");

			if (page != null) {
				pageInfo = (PageInfo) page;
			}

			StringBuilder sb = new StringBuilder();
			sb.append("<div>");
			sb.append("<span class='page_left fl'>  有 <font color='red'>");
			sb.append(pageInfo.getTotal());//总记录数
			sb.append("</font> 条记录，当前第 <font color='red'>");

			if (pageInfo.getPages() > 0) {//总页数
				sb.append(pageInfo.getPageNum());//当前页
			} else {
				sb.append(0);
			}

			sb.append("</font>/<font color='red'>");
			sb.append(pageInfo.getPages());
			sb.append("</font> 页，每页记录数 <font color='red'>");
			sb.append(pageInfo.getPageSize());
			sb.append("</font> 条 <input type='hidden' id='currentPage' name='currentPage' value='1'></span>");
			sb.append("<span class='page_right fr'>");

			if (pageInfo.getPageNum() == 1
					|| pageInfo.getPageNum() == 0
					|| pageInfo.getPages() == 0) {
				sb.append("首页 | 上页 ");// 判断是否为首页
			} else {
				sb.append("<a href=\"javascript:page_doSubmint('frist');\">首页</a>");
				sb.append("| <a href=\"javascript:page_doSubmint('up');\">上页</a>");
			}

			if (pageInfo.getPageNum() == pageInfo.getPages()
					|| pageInfo.getPages() == 0) {
				sb.append("| 下页 | 末页 ");// 判断是否为末页
			} else {
				sb.append("| <a href=\"javascript:page_doSubmint('down');\">下页</a>");
				sb.append("| <a href=\"javascript:page_doSubmint('last');\">末页</a>");
			}

			sb.append(" 跳转到第 <input id='jump' value='"
					+ pageInfo.getPageNum()
					+ "' style='width:50px;text-align:center;'"
					+ " class='jump'  onkeyup='validate.clearNoInt(this)'/>");
			sb.append(" 页 ");

			if (pageInfo.getPages() < 2) {
				sb.append("跳转");
			} else {
				sb.append("<a href=\"javascript:page_jump();\">跳转</a>");
			}

			sb.append("  </span></div>");
			sb.append("<script type='text/javascript'>");
			sb.append("function page_doSubmint(opr){");

			sb.append("var currentPage=");
			sb.append(pageInfo.getPageNum());
			sb.append(";");
			sb.append("var currentPagehidden=document.getElementById('currentPage');");
			sb.append("if(opr=='frist'){");// 首页判断
			sb.append("currentPagehidden.value=1;");
			sb.append("}else if(opr=='up'){");// 上一页判断
			sb.append("currentPagehidden.value=currentPage-1;");
			sb.append("}else if(opr=='down'){");// 下一页判断
			sb.append("currentPagehidden.value=currentPage+1;");
			sb.append("}else if(opr=='last'){");// 最后一页判断
			sb.append("currentPagehidden.value=" + pageInfo.getPages()
					+ ";");
			sb.append("}else{");// 跳转处理
			sb.append("currentPagehidden.value=opr;");
			sb.append("}");

			sb.append("return formSubmit()");

			sb.append("}");
			sb.append("function page_jump(){");// 跳转函数
			sb.append("var jump=document.getElementById('jump').value;");
			sb.append("if(isNaN(jump)||jump==''){");// 非数字及为空验证(将其置空并直接返回不做处理)
			sb.append("document.getElementById('jump').value='';");
			sb.append("return;");
			sb.append("}");
			sb.append("page_doSubmint(jump);");
			sb.append("}");
			sb.append("</script>");

			pageContext.getOut().println(sb.toString());
		} catch (IOException e) {
			e.printStackTrace();
		}

		return EVAL_BODY_INCLUDE;
	}

	@Override
	public int doEndTag() throws JspException {
		return EVAL_PAGE;
	}

	public Long getFormIndex() {
		return formIndex;
	}

	public void setFormIndex(Long formIndex) {
		this.formIndex = formIndex;
	}
}


7.遇到的问题

7.1）spring-mybatis中添加pageHelper配置时，少添加<value>一直报错

7.2）在mapper.xml中，模糊查询oracle中不支持concat的三个参数的拼接，所以一直报Cause: java.sql.SQLSyntaxErrorException: ORA-00909: 参数个数无效

7.3）前台输入汉字的时候，后台接收的username一直乱码

解决办法：在web.xml中添加

<filter>  
        <filter-name>encodingFilter</filter-name>  
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
        <init-param>  
            <param-name>encoding</param-name>  
            <param-value>UTF-8</param-value>  
        </init-param>  
        <init-param>  
            <param-name>forceEncoding</param-name>  
            <param-value>true</param-value>  
        </init-param>  
    </filter>  
     <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

解决乱码相关链接：点击打开链接

7.4）form表单提交--包含时间类型的数据

解决方法相关链接：点击打开链接

8.运行程序的截图







Mybatis分页插件的使用

相关链接1：点击打开链接

相关链接2：点击打开链接

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