SSM：使用分頁插件對查詢到的數據進行分頁【PageHelper】

1.在maven中導入pom依賴

    <!-- pageHelper -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>${pagehelper.version}</version>
    </dependency>

其中${pagehelper.version}可以自行選擇當前最高版本

2.配置攔截器插件

    <!-- 配置sessionFactory -->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactoryBean">

         ……………………
         ……………………

        <!--分頁插件-->
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>
                        </value>
                    </property>
                </bean>
            </array>
        </property>
    </bean>

在這裏面加一個分頁插件即可。

3.寫一個page工具類，把分頁的一些參數固定在裏面：【根據個人需求可以改動裏面的代碼】

package com.zzx.yamiyami.util;

public class Page {
    private int start;  //開始頁數
    private int count;  //每頁顯示個數
    private int total;  //總數
    private String param;   //參數
    private static final int defaultCount = 10;    //默認每頁顯示10條

    public Page() {
        count = defaultCount;
    }

    public Page(int start, int count) {
        this();
        this.start = start;
        this.count = count;
    }

    public boolean isHasPrevious() {
        if (start == 0) {
            return false;
        }
        return true;
    }

    public boolean isHasNext() {
        if (start == getLast()) {
            return false;
        }
        return true;
    }

    public int getTotalPage() {
        int totalPage;
        if (total % count == 0) {
            totalPage = total / count;
        } else {
            totalPage = total / count + 1;
        }
        if (totalPage == 0) {
            totalPage = 1;
        }
        return totalPage;
    }

    public int getLast() {
        int last;
        if (total % count == 0) {
            last = total - count;
        } else {
            last = total - total % count;
        }
        last = last < 0 ? 0 : last;
        return last;
    }

    public int getStart() {
        return start;
    }

    public void setStart(int start) {
        this.start = start;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }

    public String getParam() {
        return param;
    }

    public void setParam(String param) {
        this.param = param;
    }

    @Override
    public String toString() {
        return "Page [start=" + start + ", count=" + count + ", total=" + total + ", getStart()=" + getStart()
                + ", getCount()=" + getCount() + ", isHasPreviouse()=" + isHasPrevious() + ", isHasNext()="
                + isHasNext() + ", getTotalPage()=" + getTotalPage() + ", getLast()=" + getLast() + "]";
    }
}

4.簡單使用分頁：

    【controller中：】
    @RequestMapping(value = "chinese")
    public String chinese(Model model, Page page){
        PageHelper.offsetPage(page.getStart(), page.getCount());
        List<Menu> menuList = menuService.findAllMenuByCategoryId(4);
        int total = (int) new PageInfo<>(menuList).getTotal();
        page.setTotal(total);
        model.addAttribute("menuList", menuList);
        model.addAttribute("page", page);
        return "order/dish";
    }

    【jsp中】
     
     <c:forEach items="${menuList}" var="menu">
                    <div>
                        <tr class="trclass">

                            <td class="tdone xuhao"><c:out value="${menu.getM_id()}"></c:out></td>
                            <td class="tdtwo "><c:out value="${menu.getM_name()}"/></td>
                            <td class="img"><img src="${menu.getM_img()}"></td>
                            <td class="des"><span><c:out value="${menu.getM_describe()}"/></span></td>
                            <td class="tdthree"><span class="jiajie"><input type="button" value="-"><span
                                    class="num">0</span><input type="button" value="+"></span></td>
                            <td class="tdfour"><span>單價：</span><span class="unit"><c:out
                                    value="${menu.getM_price()}"/></span></td>
                            <td class="tdfive"><span>小計：</span><span class="subtal">0</span>元</td>
                        </tr>
                    </div>
     </c:forEach>


    【在jsp中需要放入頁碼的地方放入】
     <div class="pageDiv">
        <%@include file="/Page.jsp" %>
    </div>

【page.jsp，一個專門用於插入的頁面，只實現page欄】

<%@ page language="java" contentType="text/html;charset=UTF-8"
         pageEncoding="UTF-8" isELIgnored="false"%>

<script>
    $(function(){
        $("ul.pagination li.disabled a").click(function(){
            return false;
        });
    });

</script>


<nav>
    <ul class="pagination">
        <li <c:if test="${!page.hasPrevious}">class="disabled"</c:if>>
            <a  href="?start=0${page.param}" aria-label="Previous" >
                <span aria-hidden="true">&laquo;</span>
            </a>
        </li>

        <li <c:if test="${!page.hasPrevious}">class="disabled"</c:if>>
            <a  href="?start=${page.start-page.count}${page.param}" aria-label="Previous" >
                <span aria-hidden="true">&lsaquo;</span>
            </a>
        </li>

        <c:forEach begin="0" end="${page.totalPage-1}" varStatus="status">


            <li <c:if test="${status.index*page.count==page.start}">class="disabled"</c:if>>
                <a
                        href="?start=${status.index*page.count}${page.param}"
                        <c:if test="${status.index*page.count==page.start}">class="current"</c:if>
                >
                        ${status.count}
                </a>
            </li>

        </c:forEach>

        <li <c:if test="${!page.hasNext}">class="disabled"</c:if>>
            <a href="?start=${page.start+page.count}${page.param}" aria-label="Next">
                <span aria-hidden="true">&rsaquo;</span>
            </a>
        </li>
        <li <c:if test="${!page.hasNext}">class="disabled"</c:if>>
            <a href="?start=${page.last}${page.param}" aria-label="Next">
                <span aria-hidden="true">&raquo;</span>
            </a>
        </li>
    </ul>
</nav>

5.實際效果圖：