情景引入:

小白:起床起床,,,快起床!!!

我:怎麼怎麼了,小白你到底又怎麼了。。

小白:我發現在Web系統中,分頁是一種很常見的功能,可是,我之前寫的方法都比較麻煩,移植性不是很高,有沒有什麼好辦法可以快速實現分頁的呢?

我:確實是的,分頁功能幾乎在每個系統中都是存在的,它的實現也是有很多種方式的。

小白:對呀,有沒有什麼好方法呢?

我:這個嘛,對於分頁來說的話,其實我們在複雜的系統中,有很多特別的處理,這些都是需要我們進行自定義的編寫處理的。但是,如果你就想實現一種分頁效果的話,我可以給你提提建議。

小白:好喲,趕緊說趕緊說!!

我:害我又沒有懶覺睡,真是的。那接下來,我跟你說說用一種分頁外掛如何進行快速實現分頁效果吧。

情景分析:

    我們在任何的系統中,分頁功能是必不可少的。然而,對於這個功能如果有一種快速開發的實現方式,當然可以節省我們很多的時間了。接下來,我就給大家基於不同的環境來說說如何使用一個分頁外掛:pagehelper。。不過,大家可要記住了,對於不同的情況,都要認真分析場景,而不是隻會套用哦。。當然,如果你想用最原始的方式實現,也是可以的,我也寫了兩種方法,會在講解完後,貼到後面,如果有需要的就進行稍微檢視即可(但是,不是非常理想,僅供參考)。

情景一:(SpringBoot 和 Mybatis環境)

方法一:使用pagehelper-spring-boot-starter的形式(最簡單和通用的方式

使用步驟:

(1)在pom.xml檔案中引入依賴庫

<!-- 分頁外掛 -->
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper-spring-boot-starter</artifactId>
			<version>1.2.3</version>
		</dependency>

(2)在application.properties中新增分頁配置

# 配置pageHelper分頁外掛的內容
pagehelper.helper-dialect=mysql
pagehelper.reasonable=true
pagehelper.support-methods-arguments=true
pagehelper.params=count=countSql

或者在application.yml檔案中新增分頁配置

pagehelper:
 helperDialect: mysql
 reasonable: true
 supportMethodsArguments: true
 params: count=countSql

(3)進行使用。(可以在controller層或者service層使用即可)

/**
     * 查詢所有的person內容
     * @return
     */
    @RequestMapping(value = "/list")
    public String jumpJsp(Map<String, Object> result){
        PageHelper.startPage(3 , 3);
        List<Person> personList = personService.findPerson();
        //得到分頁的結果物件
        PageInfo<Person> personPageInfo = new PageInfo<>(personList);
        //得到分頁中的person條目物件
        List<Person> pageList = personPageInfo.getList();
        //將結果存入map進行傳送
        result.put("pageInfo" , pageList);
        return "person_list";
    }

解析:

(1)PageHelper.startPage(pageNum , pageSize),這個方法就是類似我們資料庫操作的limit start , count

(2)得到的物件PageInfo裡面包含很多的欄位資訊,這個可以自己看原始碼,非常詳細

(3)如果我們只想得到分頁處理之後我們的實體物件的結果,那麼就呼叫PageInfo物件的getList()方法即可。

(4)這種配置使用的方式是最通用的方式,也就是對於環境搭建不同方式都可以利用這種使用方法。

問題:如果執行時出現,org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.github.pagehelper.autoconfigure.PageHelperAutoConfiguration': 這個錯誤。

解決辦法:這是由於分頁外掛pagehelper的版本和mybatis不相容的原因,修改分頁外掛的版本即可。

方法二:使用最原始的形式(SpringBoot+Mybatis配置檔案的形式,也就是整合環境還是利用xml的形式搭建的,但是都是通過@configuration註解開發類)

使用步驟:

(1)在pom.xml檔案中,新增分頁外掛的依賴(注意和第一種方法的區別)

<!-- 分頁外掛 -->
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper</artifactId>
			<version>4.1.6</version>
		</dependency>

(2)在mybatis的配置檔案中新增如下的外掛

<!-- 配置mybatis的分頁外掛PageHelper -->
	     <plugins>
	         <!-- com.github.pagehelper為PageHelper類所在包名 -->
	         <plugin interceptor="com.github.pagehelper.PageHelper">
	             <!-- 設定資料庫型別Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六種資料庫 -->
	             <property name="dialect" value="mysql"/>
	         </plugin>
	     </plugins>

(3)在controller或者service層進行使用外掛

/**
     * 查詢所有的person內容
     * @return
     */
    @RequestMapping(value = "/list")
    public String jumpJsp(Map<String, Object> result){
        PageHelper.startPage(1 , 5);
        List<Person> personList = personService.findPerson();
        //得到分頁的結果物件
        PageInfo<Person> personPageInfo = new PageInfo<>(personList);
        //得到分頁中的person條目物件
        List<Person> pageList = personPageInfo.getList();
        //將結果存入map進行傳送
        result.put("pageInfo" , pageList);
        return "person_list";
    }
分析:對於這種方法的話,適用於對整合環境還是通過mybatis.xml的形式,所以,這種是具有針對性的一種情況。

方法三:使用最原始的方式(SpringBoot+Mybatis搭建中,Mybatis是利用在application.properties進行設定,並且mapper檔案的操作還是使用.xml形式編寫的sql語句,而非mapper註解編寫)

使用步驟:

(1)在pom.xml檔案中新增分頁外掛的依賴

<!-- 分頁外掛 -->
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper</artifactId>
			<version>4.1.6</version>
		</dependency>

(2)新增下面一個類

package com.hnu.scw.config;

import com.github.pagehelper.PageHelper;
import org.apache.ibatis.plugin.Interceptor;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Properties;

/**
 * @ Author     :scw
 * @ Date       :Created in 下午 2:48 2018/6/17 0017
 * @ Description:用於配置分頁外掛的使用
 * @ Modified By:
 * @Version: $version$
 */
@Configuration
public class PgeHeplerConfig {
    //將分頁外掛注入到容器中
    @Bean
    public PageHelper pageHelper() {
        //分頁外掛
        PageHelper pageHelper = new PageHelper();
        Properties properties = new Properties();
        properties.setProperty("reasonable", "true");
        properties.setProperty("supportMethodsArguments", "true");
        properties.setProperty("returnPageInfo", "check");
        properties.setProperty("params", "count=countSql");
        pageHelper.setProperties(properties);

        //新增外掛
        new SqlSessionFactoryBean().setPlugins(new Interceptor[]{pageHelper});
        return pageHelper;
    }

}

或者如下的程式碼:

package com.hnu.scw.config;
import com.github.pagehelper.PageHelper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.Properties;

/**
 * @ Author     :scw
 * @ Date       :Created in 下午 2:48 2018/6/17 0017
 * @ Description:用於配置分頁外掛的使用
 * @ Modified By:
 * @Version: $version$
 */
@Configuration
public class PgeHeplerConfig {
    //將分頁外掛注入到容器中
    @Bean
    public PageHelper pageHelper() {
        //分頁外掛
        PageHelper pageHelper = new PageHelper();
        Properties properties = new Properties();
        properties.setProperty("reasonable", "true");
        properties.setProperty("supportMethodsArguments", "true");
        properties.setProperty("helperDialect", "mysql");
        properties.setProperty("params", "count=countSql");
        pageHelper.setProperties(properties);
        return pageHelper;
    }

}

還可以直接在springboot的啟動類新增下面的程式碼即可。(其實都一樣的道理,因為上面的類都是用了@Configuration註解配置了的,也就是新增到了容器中)

//將分頁外掛注入到容器中
    @Bean
    public PageHelper pageHelper() {
        //分頁外掛
        PageHelper pageHelper = new PageHelper();
        Properties properties = new Properties();
        properties.setProperty("reasonable", "true");
        properties.setProperty("supportMethodsArguments", "true");
        properties.setProperty("helperDialect", "mysql");
        properties.setProperty("params", "count=countSql");
        pageHelper.setProperties(properties);
        return pageHelper;
    }

(3)直接使用

/**
     * 查詢所有的person內容
     * @return
     */
    @RequestMapping(value = "/list")
    public String jumpJsp(Map<String, Object> result){
        PageHelper.startPage(1 , 5);
        List<Person> personList = personService.findPerson();
        //得到分頁的結果物件
        PageInfo<Person> personPageInfo = new PageInfo<>(personList);
        //得到分頁中的person條目物件
        List<Person> pageList = personPageInfo.getList();
        //將結果存入map進行傳送
        result.put("pageInfo" , pageList);
        return "person_list";
    }

情景二:Spring+SpringMVC+Mybatis+Maven環境

使用步驟:(其實這個就類似情景一種的方式二,換湯不換藥)

(1)在pom.xml中新增分頁外掛的依賴

<!-- 分頁外掛 -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>4.1.6</version>
    </dependency>

(2)在mybatis中的配置檔案SqlMapConfig.xml(這個名字是你自己搭建環境所取的,就是配置一些關於Mybatis的配置檔案)新增分頁外掛。

 <!-- 配置mybatis的分頁外掛PageHelper -->
    <plugins>
        <!-- com.github.pagehelper為PageHelper類所在包名 -->
        <plugin interceptor="com.github.pagehelper.PageHelper">
            <!-- 設定資料庫型別Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六種資料庫 -->
            <property name="dialect" value="mysql"/>
        </plugin>
    </plugins>

(3)在controller層或者service實現層中使用分頁。

/**
     * 查詢所有的person內容
     * @return
     */
    @RequestMapping(value = "/list")
    public String jumpJsp(Map<String, Object> result){
        PageHelper.startPage(1 , 8);
        List<Person> personList = personService.findPerson();
        //得到分頁的結果物件
        PageInfo<Person> personPageInfo = new PageInfo<>(personList);
        //得到分頁中的person條目物件
        List<Person> pageList = personPageInfo.getList();
        //將結果存入map進行傳送
        result.put("pageInfo" , pageList);
        return "person_list";
    }

總結:

(1)pagehelper外掛本身就是基於Mybatis這種框架進行開發的外掛。所以,主要都是針對Mybatis資料操作的架構的。

(2)上面描述了多種情況的具體配置方式,都是自身經過實際開發編寫的,而且對於不同的情景,各位要理解為什麼要這樣,這雖然只是講解了分頁外掛的使用,當遇到其他外掛的時候,都可以類似進行處理。

(3)如果是用到的SSH(Spring+SpringMVC+Hibernate)或者SpringBoot+Hibernate這樣的架構的時候,這個外掛是無法使用的,就需要自己通過hibernate的形式進行處理,比如可以用HQL語法或者Criteria進行處理即可。畢竟,Hibernate是一種全自動化的資料庫操作框架。

下面的內容,是關於原始方式實現分頁效果,僅供各位進行參考(其中是通過例項來幫助大家進行分析)

實現方法一:通過自定義分頁標籤(JSP)

分頁,這個功能,我想在很多的系統中,都有用到過吧。這已經是非常非常普通的應用功能了,所以就需要將這個功能能自定義為一個jsp標籤的話,那就肯定很方便了。所以下面就說一下,如果實現這個功能。

步驟:

(1)寫兩個Java類,其中Page,很簡單就是一個分頁物件,然後NavigationTag這個就是自定義標籤的核心對映類了(如果對於這個自定義標籤的流程不是很清楚的話,可以看看我之前寫的J2EE的知識點中的內容,都很詳細介紹了)。

Page:

package com.hnuscw.common.utils;
import java.util.List;
public class Page<T> {
   
	private int total;
	private int page;
	private int size;
    private List<T> rows;
	public int getTotal() {
		return total;
	}
	public void setTotal(int total) {
		this.total = total;
	}
	public int getPage() {
		return page;
	}
	public void setPage(int page) {
		this.page = page;
	}
	public int getSize() {
		return size;
	}
	public void setSize(int size) {
		this.size = size;
	}
	public List<T> getRows() {
		return rows;
	}
	public void setRows(List<T> rows) {
		this.rows = rows;
	}   	
    
}

Navigation:

package com.hnuscw.common.utils;
import java.io.IOException;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.taglibs.standard.tag.common.core.UrlSupport;

/**
 * 顯示格式 上一頁 1 2 3 4 5 下一頁
 */
public class NavigationTag extends TagSupport {
    static final long serialVersionUID = 2372405317744358833L;
    
    /**
     * request 中用於儲存Page<E> 物件的變數名,預設為“page”
     */
    private String bean = "page";
    
    /**
     * 分頁跳轉的url地址,此屬性必須
     */
    private String url = null;
    
    /**
     * 顯示頁碼數量
     */
    private int number = 5;
    
    @Override
    public int doStartTag() throws JspException {
        JspWriter writer = pageContext.getOut();
        HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
        Page page = (Page)request.getAttribute(bean); 
        if (page == null) 
            return SKIP_BODY;
        url = resolveUrl(url, pageContext);
        try {
        	//計算總頁數
        	int pageCount = page.getTotal() / page.getSize();
        	if (page.getTotal() % page.getSize() > 0) {
        		pageCount++;
        	}
        	writer.print("<nav><ul class=\"pagination\">");
            //顯示“上一頁”按鈕
        	if (page.getPage() > 1) {
                String preUrl = append(url, "page", page.getPage() - 1);
                preUrl = append(preUrl, "rows", page.getSize());
                writer.print("<li><a href=\"" + preUrl + "\">上一頁</a></li>");
            } else {
            	writer.print("<li class=\"disabled\"><a href=\"#\">上一頁</a></li>");
            }
            //顯示當前頁碼的前2頁碼和後兩頁碼 
            //若1 則 1 2 3 4 5, 若2 則 1 2 3 4 5, 若3 則1 2 3 4 5,
            //若4 則 2 3 4 5 6 ,若10  則 8 9 10 11 12
            int indexPage = (page.getPage() - 2 > 0)? page.getPage() - 2 : 1;  
            for(int i=1; i <= number && indexPage <= pageCount; indexPage++, i++) {
                if(indexPage == page.getPage()) {
                    writer.print( "<li class=\"active\"><a href=\"#\">"+indexPage+"<span class=\"sr-only\">(current)</span></a></li>");
                    continue;
                }
                String pageUrl  = append(url, "page", indexPage);
                pageUrl = append(pageUrl, "rows", page.getSize());
                writer.print("<li><a href=\"" + pageUrl + "\">"+ indexPage +"</a></li>");
            }
            //顯示“下一頁”按鈕
            if (page.getPage() < pageCount) {
                String nextUrl  = append(url, "page", page.getPage() + 1);
                nextUrl = append(nextUrl, "rows", page.getSize());
                writer.print("<li><a href=\"" + nextUrl + "\">下一頁</a></li>");
            } else {
            	writer.print("<li class=\"disabled\"><a href=\"#\">下一頁</a></li>");
            }
            writer.print("</nav>");
        } catch (IOException e) {
            e.printStackTrace();
        }
        return SKIP_BODY;
    }
    
    private String append(String url, String key, int value) {

        return append(url, key, String.valueOf(value));
    }
    
    /**
     * 為url 參加引數對兒
     * 
     * @param url
     * @param key
     * @param value
     * @return
     */
    private String append(String url, String key, String value) {
        if (url == null || url.trim().length() == 0) {
            return "";
        }

        if (url.indexOf("?") == -1) {
            url = url + "?" + key + "=" + value;
        } else {
            if(url.endsWith("?")) {
                url = url + key + "=" + value;
            } else {
                url = url + "&" + key + "=" + value;
            }
        }
        
        return url;
    }
    
    /**
     * 為url 新增翻頁請求引數
     * 
     * @param url
     * @param pageContext
     * @return
     * @throws javax.servlet.jsp.JspException
     */
    private String resolveUrl(String url, javax.servlet.jsp.PageContext pageContext) throws JspException{
    	//UrlSupport.resolveUrl(url, context, pageContext)
    	Map params = pageContext.getRequest().getParameterMap();
    	for (Object key:params.keySet()) {
    		if ("page".equals(key) || "rows".equals(key)) continue;
    		Object value = params.get(key);
    		if (value == null) continue;
    		if (value.getClass().isArray()) {
    			url = append(url, key.toString(), ((String[])value)[0]);
    		} else if (value instanceof String) {
    			url = append(url, key.toString(), value.toString());
    		}
    	}
        return url;
    }   

    /**
     * @return the bean
     */
    public String getBean() {
        return bean;
    }

    /**
     * @param bean the bean to set
     */
    public void setBean(String bean) {
        this.bean = bean;
    }

    /**
     * @return the url
     */
    public String getUrl() {
        return url;
    }

    /**
     * @param url the url to set
     */
    public void setUrl(String url) {
        this.url = url;
    }

    public void setNumber(int number) {
        this.number = number;
    }
    
}

(2)編寫自定義標籤的tld,命令為commons.tld,並且放在WEB-INF下面的tld檔案下(這個檔案自己建立就是了)

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE taglib
  PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
  "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
	<tlib-version>2.0</tlib-version>
	<jsp-version>1.2</jsp-version>
	<short-name>common</short-name>
	<uri>http://hnuscw.com/common/</uri>
	<display-name>Common Tag</display-name>
	<description>Common Tag library</description>

	<tag>
		<name>page</name>
		<tag-class>com.hnuscw.common.utils.NavigationTag</tag-class>
		<body-content>JSP</body-content>
		<description>create navigation for paging</description>
		<attribute>
			<name>bean</name>
			<rtexprvalue>true</rtexprvalue>
		</attribute>
		<attribute>
			<name>number</name>
			<rtexprvalue>true</rtexprvalue>
		</attribute>
		<attribute>
			<name>url</name>
			<required>true</required>
			<rtexprvalue>true</rtexprvalue>
		</attribute>
	</tag>
</taglib>

(3)在jsp頁面中進行使用

引入標籤:

<%@ taglib prefix="hnuscw" uri="http://hnuscw.com/common/"%>
使用標籤:
<div class="col-md-12 text-right">
	<hnuscw:page url="${pageContext.request.contextPath }/customer/list.action" />
</div>

測試例項:為了方便很多的使用,我這就還是用一個實際的例子還顯示這個效果吧。

jsp頁面:命名為:customer.jsp(當然可以不要這麼多內容,自行更改即可,只是這個就相當於一個管理系統的了,所以以後只需要稍微修改就可以)

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<%@ page trimDirectiveWhitespaces="true"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="itcast" uri="http://itcast.cn/common/"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">

<title>客戶列表-BootCRM</title>

<!-- Bootstrap Core CSS -->
<link href="<%=basePath%>css/bootstrap.min.css" rel="stylesheet">

<!-- MetisMenu CSS -->
<link href="<%=basePath%>css/metisMenu.min.css" rel="stylesheet">

<!-- DataTables CSS -->
<link href="<%=basePath%>css/dataTables.bootstrap.css" rel="stylesheet">

<!-- Custom CSS -->
<link href="<%=basePath%>css/sb-admin-2.css" rel="stylesheet">

<!-- Custom Fonts -->
<link href="<%=basePath%>css/font-awesome.min.css" rel="stylesheet"
	type="text/css">
<link href="<%=basePath%>css/boot-crm.css" rel="stylesheet"
	type="text/css">

<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
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</head>

<body>
	<div id="wrapper">

		<!-- Navigation -->
		<nav class="navbar navbar-default navbar-static-top" role="navigation"
			style="margin-bottom: 0">
		<div class="navbar-header">
			<button type="button" class="navbar-toggle" data-toggle="collapse"
				data-target=".navbar-collapse">
				<span class="sr-only">Toggle navigation</span> <span
					class="icon-bar"></span> <span class="icon-bar"></span> <span
					class="icon-bar"></span>
			</button>
			<a class="navbar-brand" href="index.html">BOOT客戶管理系統 v2.0</a>
		</div>
		<!-- /.navbar-header -->

		<ul class="nav navbar-top-links navbar-right">
			<li class="dropdown"><a class="dropdown-toggle"
				data-toggle="dropdown" href="#"> <i class="fa fa-envelope fa-fw"></i>
					<i class="fa fa-caret-down"></i>
			</a>
				<ul class="dropdown-menu dropdown-messages">
					<li><a href="#">
							<div>
								<strong>令狐沖</strong> <span class="pull-right text-muted">
									<em>昨天</em>
								</span>
							</div>
							<div>今天晚上向大哥找我吃飯,討論一下去梅莊的事...</div>
					</a></li>
					<li class="divider"></li>
					<li><a class="text-center" href="#"> <strong>檢視全部訊息</strong>
							<i class="fa fa-angle-right"></i>
					</a></li>
				</ul> <!-- /.dropdown-messages --></li>
			<!-- /.dropdown -->
			<li class="dropdown"><a class="dropdown-toggle"
				data-toggle="dropdown" href="#"> <i class="fa fa-tasks fa-fw"></i>
					<i class="fa fa-caret-down"></i>
			</a>
				<ul class="dropdown-menu dropdown-tasks">
					<li><a href="#">
							<div>
								<p>
									<strong>任務 1</strong> <span class="pull-right text-muted">完成40%</span>
								</p>
								<div class="progress progress-striped active">
									<div class="progress-bar progress-bar-success"
										role="progressbar" aria-valuenow="40" aria-valuemin="0"
										aria-valuemax="100" style="width: 40%">
										<span class="sr-only">完成40%</span>
									</div>
								</div>
							</div>
					</a></li>
					<li class="divider"></li>
					<li><a href="#">
							<div>
								<p>
									<strong>任務 2</strong> <span class="pull-right text-muted">完成20%</span>
								</p>
								<div class="progress progress-striped active">
									<div class="progress-bar progress-bar-info" role="progressbar"
										aria-valuenow="20" aria-valuemin="0" aria-valuemax="100"
										style="width: 20%">
										<span class="sr-only">完成20%</span>
									</div>
								</div>
							</div>
					</a></li>
					<li class="divider"></li>
					<li><a class="text-center" href="#"> <strong>檢視所有任務</strong>
							<i class="fa fa-angle-right"></i>
					</a></li>
				</ul> <!-- /.dropdown-tasks --></li>
			<!-- /.dropdown -->
			<li class="dropdown"><a class="dropdown-toggle"
				data-toggle="dropdown" href="#"> <i class="fa fa-bell fa-fw"></i>
					<i class="fa fa-caret-down"></i>
			</a>
				<ul class="dropdown-menu dropdown-alerts">
					<li><a href="#">
							<div>
								<i class="fa fa-comment fa-fw"></i> 新回覆 <span
									class="pull-right text-muted small">4分鐘之前</span>
							</div>
					</a></li>
					<li class="divider"></li>
					<li><a href="#">
							<div>
								<i class="fa fa-envelope fa-fw"></i> 新訊息 <span
									class="pull-right text-muted small">4分鐘之前</span>
							</div>
					</a></li>
					<li class="divider"></li>
					<li><a href="#">
							<div>
								<i class="fa fa-tasks fa-fw"></i> 新任務 <span
									class="pull-right text-muted small">4分鐘之前</span>
							</div>
					</a></li>
					<li class="divider"></li>
					<li><a href="#">
							<div>
								<i class="fa fa-upload fa-fw"></i> 伺服器重啟 <span
									class="pull-right text-muted small">4分鐘之前</span>
							</div>
					</a></li>
					<li class="divider"></li>
					<li><a class="text-center" href="#"> <strong>檢視所有提醒</strong>
							<i class="fa fa-angle-right"></i>
					</a></li>
				</ul> <!-- /.dropdown-alerts --></li>
			<!-- /.dropdown -->
			<li class="dropdown"><a class="dropdown-toggle"
				data-toggle="dropdown" href="#"> <i class="fa fa-user fa-fw"></i>
					<i class="fa fa-caret-down"></i>
			</a>
				<ul class="dropdown-menu dropdown-user">
					<li><a href="#"><i class="fa fa-user fa-fw"></i> 使用者設定</a></li>
					<li><a href="#"><i class="fa fa-gear fa-fw"></i> 系統設定</a></li>
					<li class="divider"></li>
					<li><a href="login.html"><i class="fa fa-sign-out fa-fw"></i>
							退出登入</a></li>
				</ul> <!-- /.dropdown-user --></li>
			<!-- /.dropdown -->
		</ul>
		<!-- /.navbar-top-links -->

		<div class="navbar-default sidebar" role="navigation">
			<div class="sidebar-nav navbar-collapse">
				<ul class="nav" id="side-menu">
					<li class="sidebar-search">
						<div class="input-group custom-search-form">
							<input type="text" class="form-control" placeholder="查詢內容...">
							<span class="input-group-btn">
								<button class="btn btn-default" type="button">
									<i class="fa fa-search" style="padding: 3px 0 3px 0;"></i>
								</button>
							</span>
						</div> <!-- /input-group -->
					</li>
					<li><a href="customer.action" class="active"><i
							class="fa fa-edit fa-fw"></i> 客戶管理</a></li>
					<li><a href="salevisit.action"><i
							class="fa fa-dashboard fa-fw"></i> 客戶拜訪</a></li>
				</ul>
			</div>
			<!-- /.sidebar-collapse -->
		</div>
		<!-- /.navbar-static-side --> </nav>

		<div id="page-wrapper">
			<div class="row">
				<div class="col-lg-12">
					<h1 class="page-header">客戶管理</h1>
				</div>
				<!-- /.col-lg-12 -->
			</div>
			<!-- /.row -->
			<div class="panel panel-default">
				<div class="panel-body">
					<form class="form-inline" action="${pageContext.request.contextPath }/customer/list.action" method="get">
						<div class="form-group">
							<label for="customerName">客戶名稱</label> 
							<input type="text" class="form-control" id="customerName" value="${custName }" name="custName">
						</div>
						<div class="form-group">
							<label for="customerFrom">客戶來源</label> 
							<select	class="form-control" id="customerFrom" placeholder="客戶來源" name="custSource">
								<option value="">--請選擇--</option>
								<c:forEach items="${fromType}" var="item">
									<option value="${item.dict_id}"<c:if test="${item.dict_id == custSource}"> selected</c:if>>${item.dict_item_name }</option>
								</c:forEach>
							</select>
						</div>
						<div class="form-group">
							<label for="custIndustry">所屬行業</label> 
							<select	class="form-control" id="custIndustry"  name="custIndustry">
								<option value="">--請選擇--</option>
								<c:forEach items="${industryType}" var="item">
									<option value="${item.dict_id}"<c:if test="${item.dict_id == custIndustry}"> selected</c:if>>${item.dict_item_name }</option>
								</c:forEach>
							</select>
						</div>
						<div class="form-group">
							<label for="custLevel">客戶級別</label>
							<select	class="form-control" id="custLevel" name="custLevel">
								<option value="">--請選擇--</option>
								<c:forEach items="${levelType}" var="item">
									<option value="${item.dict_id}"<c:if test="${item.dict_id == custLevel}"> selected</c:if>>${item.dict_item_name }</option>
								</c:forEach>
							</select>
						</div>
						<button type="submit" class="btn btn-primary">查詢</button>
					</form>
				</div>
			</div>
			<div class="row">
				<div class="col-lg-12">
					<div class="panel panel-default">
						<div class="panel-heading">客戶資訊列表</div>
						<!-- /.panel-heading -->
						<table class="table table-bordered table-striped">
							<thead>
								<tr>
									<th>ID</th>
									<th>客戶名稱</th>
									<th>客戶來源</th>
									<th>客戶所屬行業</th>
									<th>客戶級別</th>
									<th>固定電話</th>
									<th>手機</th>
									<th>操作</th>
								</tr>
							</thead>
							<tbody>
								<c:forEach items="${page.rows}" var="row">
									<tr>
										<td>${row.cust_id}</td>
										<td>${row.cust_name}</td>
										<td>${row.cust_source}</td>
										<td>${row.cust_industry}</td>
										<td>${row.cust_level}</td>
										<td>${row.cust_phone}</td>
										<td>${row.cust_mobile}</td>
										<td>
											<a href="#" class="btn btn-primary btn-xs" data-toggle="modal" data-target="#customerEditDialog" onclick="editCustomer(${row.cust_id})">修改</a>
											<a href="#" class="btn btn-danger btn-xs" onclick="deleteCustomer(${row.cust_id})">刪除</a>
										</td>
									</tr>
								</c:forEach>
							</tbody>
						</table>
						<div class="col-md-12 text-right">
							<itcast:page url="${pageContext.request.contextPath }/customer/list.action" />
						</div>
						<!-- /.panel-body -->
					</div>
					<!-- /.panel -->
				</div>
				<!-- /.col-lg-12 -->
			</div>
		</div>
		<!-- /#page-wrapper -->

	</div>
	<!-- 客戶編輯對話方塊 -->
	<div class="modal fade" id="customerEditDialog" tabindex="-1" role="dialog"
		aria-labelledby="myModalLabel">
		<div class="modal-dialog" role="document">
			<div class="modal-content">
				<div class="modal-header">
					<button type="button" class="close" data-dismiss="modal" aria-label="Close">
						<span aria-hidden="true">×</span>
					</button>
					<h4 class="modal-title" id="myModalLabel">修改客戶資訊</h4>
				</div>
				<div class="modal-body">
					<form class="form-horizontal" id="edit_customer_form">
						<input type="hidden" id="edit_cust_id" name="cust_id"/>
						<div class="form-group">
							<label for="edit_customerName" class="col-sm-2 control-label">客戶名稱</label>
							<div class="col-sm-10">
								<input type="text" class="form-control" id="edit_customerName" placeholder="客戶名稱" name="cust_name">
							</div>
						</div>
						<div class="form-group">
							<label for="edit_customerFrom" style="float:left;padding:7px 15px 0 27px;">客戶來源</label> 
							<div class="col-sm-10">
								<select	class="form-control" id="edit_customerFrom" placeholder="客戶來源" name="cust_source">
									<option value="">--請選擇--</option>
									<c:forEach items="${fromType}" var="item">
										<option value="${item.dict_id}"<c:if test="${item.dict_id == custSource}"> selected</c:if>>${item.dict_item_name }</option>
									</c:forEach>
								</select>
							</div>
						</div>
						<div class="form-group">
							<label for="edit_custIndustry" style="float:left;padding:7px 15px 0 27px;">所屬行業</label>
							<div class="col-sm-10"> 
								<select	class="form-control" id="edit_custIndustry"  name="cust_industry">
									<option value="">--請選擇--</option>
									<c:forEach items="${industryType}" var="item">
										<option value="${item.dict_id}"<c:if test="${item.dict_id == custIndustry}"> selected</c:if>>${item.dict_item_name }</option>
									</c:forEach>
								</select>
							</div>
						</div>
						<div class="form-group">
							<label for="edit_custLevel" style="float:left;padding:7px 15px 0 27px;">客戶級別</label>
							<div class="col-sm-10">
								<select	class="form-control" id="edit_custLevel" name="cust_level">
									<option value="">--請選擇--</option>
									<c:forEach items="${levelType}" var="item">
										<option value="${item.dict_id}"<c:if test="${item.dict_id == custLevel}"> selected</c:if>>${item.dict_item_name }</option>
									</c:forEach>
								</select>
							</div>
						</div>
						<div class="form-group">
							<label for="edit_linkMan" class="col-sm-2 control-label">聯絡人</label>
							<div class="col-sm-10">
								<input type="text" class="form-control" id="edit_linkMan" placeholder="聯絡人" name="cust_linkman">
							</div>
						</div>
						<div class="form-group">
							<label for="edit_phone" class="col-sm-2 control-label">固定電話</label>
							<div class="col-sm-10">
								<input type="text" class="form-control" id="edit_phone" placeholder="固定電話" name="cust_phone">
							</div>
						</div>
						<div class="form-group">
							<label for="edit_mobile" class="col-sm-2 control-label">行動電話</label>
							<div class="col-sm-10">
								<input type="text" class="form-control" id="edit_mobile" placeholder="行動電話" name="cust_mobile">
							</div>
						</div>
						<div class="form-group">
							<label for="edit_zipcode" class="col-sm-2 control-label">郵政編碼</label>
							<div class="col-sm-10">
								<input type="text" class="form-control" id="edit_zipcode" placeholder="郵政編碼" name="cust_zipcode">
							</div>
						</div>
						<div class="form-group">
							<label for="edit_address" class="col-sm-2 control-label">聯絡地址</label>
							<div class="col-sm-10">
								<input type="text" class="form-control" id="edit_address" placeholder="聯絡地址" name="cust_address">
							</div>
						</div>
					</form>
				</div>
				<div class="modal-footer">
					<button type="button" class="btn btn-default" data-dismiss="modal">關閉</button>
					<button type="button" class="btn btn-primary" onclick="updateCustomer()">儲存修改</button>
				</div>
			</div>
		</div>
	</div>
	<!-- /#wrapper -->

	<!-- jQuery -->
	<script src="<%=basePath%>js/jquery.min.js"></script>

	<!-- Bootstrap Core JavaScript -->
	<script src="<%=basePath%>js/bootstrap.min.js"></script>

	<!-- Metis Menu Plugin JavaScript -->
	<script src="<%=basePath%>js/metisMenu.min.js"></script>

	<!-- DataTables JavaScript -->
	<script src="<%=basePath%>js/jquery.dataTables.min.js"></script>
	<script src="<%=basePath%>js/dataTables.bootstrap.min.js"></script>

	<!-- Custom Theme JavaScript -->
	<script src="<%=basePath%>js/sb-admin-2.js"></script>
	
	<script type="text/javascript">
		function editCustomer(id) {
			$.ajax({
				type:"get",
				url:"<%=basePath%>customer/edit.action",
				data:{"id":id},
				success:function(data) {
					$("#edit_cust_id").val(data.cust_id);
					$("#edit_customerName").val(data.cust_name);
					$("#edit_customerFrom").val(data.cust_source)
					$("#edit_custIndustry").val(data.cust_industry)
					$("#edit_custLevel").val(data.cust_level)
					$("#edit_linkMan").val(data.cust_linkman);
					$("#edit_phone").val(data.cust_phone);
					$("#edit_mobile").val(data.cust_mobile);
					$("#edit_zipcode").val(data.cust_zipcode);
					$("#edit_address").val(data.cust_address);
					
				}
			});
		}
		function updateCustomer() {
			$.post("<%=basePath%>customer/update.action",$("#edit_customer_form").serialize(),function(data){
				alert("客戶資訊更新成功!");
				window.location.reload();
			});
		}
		
		function deleteCustomer(id) {
			if(confirm('確實要刪除該客戶嗎?')) {
				$.post("<%=basePath%>customer/delete.action",{"id":id},function(data){
					alert("客戶刪除更新成功!");
					window.location.reload();
				});
			}
		}
	</script>

</body>

</html>

pojo實體:

customer類程式碼:(也就是頁面中顯示的每條資料內容的javabean)

package com.hnuscw.crm.pojo;

import java.util.Date;

public class Customer {	
	private Long cust_id;
	private String cust_name;
	private Long cust_user_id;
	private Long cust_create_id;
	private String cust_source;
	private String cust_industry;
	private String cust_level;
	private String cust_linkman;
	private String cust_phone;
	private String cust_mobile;
	private String cust_zipcode;
	private String cust_address;
	private Date cust_createtime;
	public Long getCust_id() {
		return cust_id;
	}
	public void setCust_id(Long cust_id) {
		this.cust_id = cust_id;
	}
	public String getCust_name() {
		return cust_name;
	}
	public void setCust_name(String cust_name) {
		this.cust_name = cust_name;
	}
	public Long getCust_user_id() {
		return cust_user_id;
	}
	public void setCust_user_id(Long cust_user_id) {
		this.cust_user_id = cust_user_id;
	}
	public Long getCust_create_id() {
		return cust_create_id;
	}
	public void setCust_create_id(Long cust_create_id) {
		this.cust_create_id = cust_create_id;
	}
	public String getCust_source() {
		return cust_source;
	}
	public void setCust_source(String cust_source) {
		this.cust_source = cust_source;
	}
	public String getCust_industry() {
		return cust_industry;
	}
	public void setCust_industry(String cust_industry) {
		this.cust_industry = cust_industry;
	}
	public String getCust_level() {
		return cust_level;
	}
	public void setCust_level(String cust_level) {
		this.cust_level = cust_level;
	}
	public String getCust_linkman() {
		return cust_linkman;
	}
	public void setCust_linkman(String cust_linkman) {
		this.cust_linkman = cust_linkman;
	}
	public String getCust_phone() {
		return cust_phone;
	}
	public void setCust_phone(String cust_phone) {
		this.cust_phone = cust_phone;
	}
	public String getCust_mobile() {
		return cust_mobile;
	}
	public void setCust_mobile(String cust_mobile) {
		this.cust_mobile = cust_mobile;
	}
	public String getCust_zipcode() {
		return cust_zipcode;
	}
	public void setCust_zipcode(String cust_zipcode) {
		this.cust_zipcode = cust_zipcode;
	}
	public String getCust_address() {
		return cust_address;
	}
	public void setCust_address(String cust_address) {
		this.cust_address = cust_address;
	}
	public Date getCust_createtime() {
		return cust_createtime;
	}
	public void setCust_createtime(Date cust_createtime) {
		this.cust_createtime = cust_createtime;
	}		
}

Queryvo類程式碼:(這個主要就是對於封裝分頁處理和搜尋查詢來的)

package com.hnuscw.crm.pojo;
public class QueryVo {

	//客戶名稱
	private String custName;
	private String custSource;
	private String custIndustry;
	private String custLevel;
	//當前頁
	private Integer page;
	//每頁數
	private Integer size = 10; 
	//開始行
	private Integer startRow = 0;
	
	
	public Integer getStartRow() {
		return startRow;
	}
	public void setStartRow(Integer startRow) {
		this.startRow = startRow;
	}
	//
	public String getCustName() {
		return custName;
	}
	public void setCustName(String custName) {
		this.custName = custName;
	}
	public String getCustSource() {
		return custSource;
	}
	public void setCustSource(String custSource) {
		this.custSource = custSource;
	}
	public String getCustIndustry() {
		return custIndustry;
	}
	public void setCustIndustry(String custIndustry) {
		this.custIndustry = custIndustry;
	}
	public String getCustLevel() {
		return custLevel;
	}
	public void setCustLevel(String custLevel) {
		this.custLevel = custLevel;
	}
	public Integer getPage() {
		return page;
	}
	public void setPage(Integer page) {
		this.page = page;
	}
	public Integer getSize() {
		return size;
	}
	public void setSize(Integer size) {
		this.size = size;
	}
}

contraoller層:

//入口
	@RequestMapping(value = "/customer/list")
	public String list(QueryVo vo,Model model){
		//因為很多頁面中都有搜尋內容的處理,所以下面也進行了一點內容的新增,這個可以根據需要進行
		List<BaseDict> fromType = baseDictService.selectBaseDictListByCode("002");//這是為了頁面進行搜尋選擇而增加
		List<BaseDict> industryType = baseDictService.selectBaseDictListByCode("001");//為了頁面搜尋選擇而增加
		List<BaseDict> levelType = baseDictService.selectBaseDictListByCode("006");//為了頁面搜尋選擇而增加
		model.addAttribute("fromType", fromType);
		model.addAttribute("industryType", industryType);
		model.addAttribute("levelType", levelType);
			
		//通過四個條件  查詢分頁物件(這是分頁處理的核心的核心)
		Page<Customer> page = customerService.selectPageByQueryVo(vo);
		model.addAttribute("page", page);
		model.addAttribute("custName", vo.getCustName()); //下面幾句話都是為了jsp回顯而已
		model.addAttribute("custSource", vo.getCustSource());
		model.addAttribute("custIndustry", vo.getCustIndustry());
		model.addAttribute("custLevel", vo.getCustLevel());
		
		return "customer";// 返回到上面的那個jsp主介面
	}

service介面層:(這裡幾個都貼出來吧,其實關於分頁的主要就是CuestomerService)

搜尋條件的service:

package com.hnuscw.crm.service;
import java.util.List;
import com.itheima.crm.pojo.BaseDict;
public interface BaseDictService {	
	//查詢
	public List<BaseDict> selectBaseDictListByCode(String code);
}

customer分頁物件的service:

package com.hnu.scw.service;
import com.itheima.crm.pojo.Customer;
import com.itheima.crm.pojo.QueryVo;
public interface CustomerService {	
	// 通過四個條件 查詢分頁物件
	public Page<Customer> selectPageByQueryVo(QueryVo vo);
}

service實現層:

搜尋條件的實現層程式碼:

package com.hnuscw.crm.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.itheima.crm.mapper.BaseDictDao;
import com.itheima.crm.pojo.BaseDict;

@Service
//@Transactional
public class BaseDictServiceImpl implements BaseDictService {
	@Autowired
	private BaseDictDao baseDictDao;

	public List<BaseDict> selectBaseDictListByCode(String code) {
		// TODO Auto-generated method stub
		return baseDictDao.selectBaseDictListByCode(code);
	}
}

分頁處理的實現層程式碼:

package com.itheima.crm.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.itheima.common.utils.Page;
import com.itheima.crm.mapper.CustomerDao;
import com.itheima.crm.pojo.Customer;
import com.itheima.crm.pojo.QueryVo;

/**
 * 客戶管理
 * 
 * @author lx
 *
 */
@Service
public class CustomerServiceImpl implements CustomerService {

	@Autowired
	private CustomerDao customerDao;
	// 通過四個條件 查詢分頁物件
	public Page<Customer> selectPageByQueryVo(QueryVo vo) {
		Page<Customer> page = new Page<Customer>();
		//每頁數
		page.setSize(5);
		vo.setSize(5);
		if (null != vo) {
			// 判斷當前頁
			if (null != vo.getPage()) {
				page.setPage(vo.getPage());
				vo.setStartRow((vo.getPage() -1)*vo.getSize());
			}
			if(null != vo.getCustName() && !"".equals(vo.getCustName().trim())){
				vo.setCustName(vo.getCustName().trim());
			}
			if(null != vo.getCustSource() && !"".equals(vo.getCustSource().trim())){
				vo.setCustSource(vo.getCustSource().trim());
			}
			if(null != vo.getCustIndustry() && !"".equals(vo.getCustIndustry().trim())){
				vo.setCustIndustry(vo.getCustIndustry().trim());
			}
			if(null != vo.getCustLevel() && !"".equals(vo.getCustLevel().trim())){
				vo.setCustLevel(vo.getCustLevel().trim());
			}
			//總條數
			page.setTotal(customerDao.customerCountByQueryVo(vo));
			page.setRows(customerDao.selectCustomerListByQueryVo(vo));
		}
		return page;
	}
}

dao層介面:

搜尋處理的dao層:

package com.hnuscw.crm.mapper;
import java.util.List;
import com.itheima.crm.pojo.BaseDict;
public interface BaseDictDao {	
	//查詢
	public List<BaseDict> selectBaseDictListByCode(String code);
}
分頁處理的dao層:
package com.itheima.crm.mapper;

import java.util.List;

import com.itheima.crm.pojo.Customer;
import com.itheima.crm.pojo.QueryVo;

public interface CustomerDao {
	//總條數
	public Integer customerCountByQueryVo(QueryVo vo);
	//結果集
	public List<Customer> selectCustomerListByQueryVo(QueryVo vo);
	
}

mapper對映:

搜尋處理的對映mapper:

<?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="com.itheima.crm.mapper.BaseDictDao">
	<!-- 查詢 -->
	<select id="selectBaseDictListByCode" parameterType="String" resultType="BaseDict">
		select * from base_dict where dict_type_code = #{value}
	</select>

</mapper>

分頁處理的對映mapper:

<?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="com.itheima.crm.mapper.CustomerDao">
	<!-- //總條數 -->
	<!-- public Integer customerCountByQueryVo(QueryVo vo); private String custName; 
		private String custSource; private String custIndustry; private String custLevel; -->
	<select id="customerCountByQueryVo" parameterType="QueryVo"
		resultType="Integer">
		select count(1) from customer
		<where>
			<if test="custName != null and custName != ''">
				cust_name like "%"#{custName}"%"
			</if>
			<if test="custSource != null and custSource != ''">
				and cust_source = #{custSource}
			</if>
			<if test="custIndustry != null and custIndustry != ''">
				and cust_industry = #{custIndustry}
			</if>
			<if test="custLevel != null and custLevel != ''">
				and cust_level = #{custLevel}
			</if>
		</where>
	</select>
	<!-- //結果集 -->
	<!-- public List<Customer> selectCustomerListByQueryVo(QueryVo vo); -->
	<select id="selectCustomerListByQueryVo" parameterType="QueryVo"
		resultType="Customer">
		select * from customer
		<where>
			<if test="custName != null and custName != ''">
				cust_name like "%"#{custName}"%"
			</if>
			<if test="custSource != null and custSource != ''">
				and cust_source = #{custSource}
			</if>
			<if test="custIndustry != null and custIndustry != ''">
				and cust_industry = #{custIndustry}
			</if>
			<if test="custLevel != null and custLevel != ''">
				and cust_level = #{custLevel}
			</if>
		</where>
		limit #{startRow},#{size}
	</select>
</mapper>

PS:(1)上面的程式碼加上對自定義標籤的使用的話,就實現了分頁內容的處理了,所以,如果需要使用的話就可以根據這樣的內容進行處理即可。此外,上面的jsp中是有條件搜尋的,所以程式碼中也加入了對條件搜尋的處理,如果你那介面只是想實現分頁處理的話,那麼在每個層次中將條件處理的程式碼刪除即可,這樣也不會進行影響,關鍵還是要看懂程式碼,如果看懂了的話,還是很好進行處理的。當然,這並不是最優化的情況,還能夠進行處理,只是這是一種方法而已。

(2)如果要使用上面的jsp程式碼的話, 要先配置一下下面的內容,對內容進行放行處理.

實現方法二:通過JSP控制分頁處理的方法

分析:在第二點中提到了分頁的方法,主要是利用jstl中的自定義標籤來實現的,接下來的話,介紹一下另外一種方法,就是如何利用jsp頁面來控制分頁的處理方法。

步驟:(1)編寫jsp中的分頁內容程式碼(這裡主要就是寫一下分頁的頁面介面和當頁數過多的時候如何進行處理的問題)

<!-- 分頁內容的處理部分 -->
						<td style="vertical-align:top;">
							<div class="pagination" style="float: right;padding-top: 0px;margin-top: 0px;">
								<ul>
									<li><a>共<font color=red>${page.totalResult}</font>條</a></li>
									<li><input type="number" value="" id="jumpPageNumber" style="width:50px;text-align:center;float:left" placeholder="頁碼"/></li>
									<li style="cursor:pointer;"><a onclick="jumpPage();"  class="btn btn-mini btn-success">跳轉</a></li>
									<c:choose>
									<c:when test="${page.currentPage == 1 }">	
										<li><a>首頁</a></li>
										<li><a>上頁</a></li>
									<!-- 分是否為第一頁的兩種情況,不為第一頁的話,那麼就要設定首頁和上一頁為有onclick點選事件 -->
									</c:when>
									<c:otherwise>
										<li style="cursor:pointer;"><a onclick="nextPage(1);">首頁</a></li>
										<li style="cursor:pointer;"><a onclick="nextPage(${page.currentPage}-1);">上頁</a></li>
									</c:otherwise>
									</c:choose>
									<!-- 分頁處理的優化工作 -->
									<c:choose>
										<c:when test="${page.currentPage + 4 > page.totalPage}">  <!-- 現在每個分頁為顯示5頁 ,所以先判斷當前的頁面+4是否大於總的頁面數-->
											<c:choose>
												<c:when test="${page.totalPage-4 > 0}">   <!-- 判斷是否總的頁面數也是大於5,因為這樣的話,就會出現兩種情況 -->
													<c:forEach var="index1" begin="${page.totalPage-4}" end="${page.totalPage}" step="1">
														<c:if test="${index1 >= 1}">
															<c:choose>
																<c:when test="${page.currentPage == index1}">
																	<li><a><b style="color: red;">${page.currentPage}</b></a></li>
																</c:when>
																<c:otherwise>
																	<li style="cursor:pointer;"><a onclick="changePage(${index1});">${index1}</a></li>												
																</c:otherwise>
															</c:choose>
														</c:if>
													</c:forEach>
												</c:when>
												
												<c:otherwise>  <!-- 當總的頁面數都不足5的時候,那麼直接全部顯示即可,不需要考慮太多 -->
													<c:forEach  var="pagenumber"  begin="1" end="${page.totalPage}">
														<!-- 判斷頁碼是否是當前頁,是的話,就換個顏色來標記 -->
														<c:choose>
																<c:when test="${page.currentPage == pagenumber}">
																	<li><a><b style="color: red;">${page.currentPage}</b></a></li>
																</c:when>
																<c:otherwise>
																	<li style="cursor:pointer;"><a onclick="changePage(${pagenumber});">${pagenumber}</a></li>												
																</c:otherwise>
														</c:choose>				
													</c:forEach>
												</c:otherwise>
											</c:choose>
											
										</c:when>
										
										<c:otherwise>  <!-- 噹噹前頁面數+4都還是小於總的頁面數的情況 -->
											<c:choose>
												<c:when test="${page.currentPage != 1}">	<!-- 判斷當前頁面是否就是第一頁,因為這樣也會有兩種情況的處理 -->												
														<c:forEach var="index2" begin="${page.currentPage-1}" end="${page.currentPage+3}"> <!-- 從當前頁面減一的頁面數開始,這樣點選前面一頁就會顯示其他的頁面,從而實現頁面跳轉 -->
															<c:choose>
																<c:when test="${page.currentPage == index2}">
																	<li><a><b style="color: red;">${page.currentPage}</b></a></li>
																</c:when>
																<c:otherwise>
																	<li style="cursor:pointer;"><a onclick="changePage(${index2});">${index2}</a></li>												
																</c:otherwise>	
															</c:choose>										
														</c:forEach>												
												</c:when>
												
												<c:otherwise>	<!-- 噹噹前頁面數就是第一頁的時候,就直接顯示1-5頁即可 -->											
													<c:forEach var="index3" begin="1" end="5">
														<c:choose>
															<c:when test="${page.currentPage == index3}">
																<li><a><b style="color: red;">${page.currentPage}</b></a></li>
															</c:when>
															<c:otherwise>
																<li style="cursor:pointer;"><a onclick="changePage(${index3});">${index3}</a></li>												
															</c:otherwise>
														</c:choose>
													</c:forEach>													
												</c:otherwise>												
											</c:choose>
										</c:otherwise>
									</c:choose>									
									<!-- 處理 當前頁是否最後一頁,不是的話,就需要新增下一頁的點選時間-->
									<c:choose>
										<c:when test="${page.currentPage == page.totalPage }">
											<li><a>下頁</a></li>
											<li><a>尾頁</a></li>
										</c:when>
										<c:otherwise>
											<li style="cursor:pointer;"><a onclick="nextPage(${page.currentPage}+1)">下頁</a></li>
											<li style="cursor:pointer;"><a onclick="nextPage(${page.totalPage});">尾頁</a></li>
										</c:otherwise>						
									</c:choose>
										
									<!-- 處理 頁面大小的處理-->
									<li><a>第${page.currentPage}頁</a></li>
									<li><a>共${page.totalPage}頁</a></li>
									<!-- 進行每一個頁面顯示資料條目大小的選擇 -->
									<li>
									<!-- 注意:當進行選擇改變的時候,就會出發changeCount這個事件,再通過Ajax進行頁面資料的請求 -->
									<select title='顯示條數' style="width:55px;float:left;" onchange="changeCount(this.value)">
									<option value="${page.showCount}">${page.showCount}</option>
									<option value='5'>5</option>
									<option value='10'>10</option>
									<option value='20'>20</option>
									<option value='30'>30</option>
									<option value='40'>40</option>
									<option value='50'>50</option>
									<option value='60'>60</option>