ssm下使用分页插件PageHelper进行分页

1. 导入maven依赖：

<dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>5.1.2</version>
</dependency>

2. 编写SqlConfig.xml配置文件(这个文件的名字任意)

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <!-- mybatis分页插件 -->
    <plugins>
        <plugin interceptor="com.github.pagehelper.PageInterceptor"></plugin>
    </plugins>
</configuration>

3. 编写controller方法，注意：查询的方法必须紧跟在PageHelper.startPage(pn, 10); 这条语句后面！！

/**
     * 查看所有问题
     *
     * @param model
     * @return
     */
    @RequestMapping("/findAll")
    public String findAll(@RequestParam(value="pn",defaultValue="1")Integer pn, Model model) {
        //从第一条开始 每页查询10条数据
        PageHelper.startPage(pn, 10);
        List<Question> questions = questionService.findAll();
        //将用户信息放入PageInfo对象里
        PageInfo page = new PageInfo(questions,10);
        model.addAttribute("pageInfo", page);
        return "question_list";
    }

4. jsp页面显示：question_list.jsp

        <%--页面数据展示--%>
        <div id="table-div">
            <table class="table table-hover">
                <c:forEach items="${pageInfo.list}" var="question" varStatus="vs">
                    <tr>
                        <td class="td1">
                            <a href="${pageContext.request.contextPath}/question/look?qid=${question.qid}">
                                <img src="${pageContext.request.contextPath}/images/question_logo.png"
                                     style=" 20px;height: 20px;"/> ${question.title}
                            </a>
                            <font color="red"> - [悬赏 ${question.credit} 积分] </font>
                            <c:if test="${question.isResolved == 1}">
                                (已解决)
                            </c:if>
                        </td>
                        <td class="td2">
                            <fmt:formatDate value="${question.askTime}" pattern="yyyy-MM-dd HH:mm"/>
                            &nbsp;&nbsp;&nbsp;
                        </td>
                    </tr>
                </c:forEach>
            </table>
        </div>

        <!-- 分页条 -->
        <div id="div_pagination_bottom">
            <nav aria-label="Page navigation">
                <ul class="pagination">
                    <li>
                        <a href="${pageContext.request.contextPath}/question/findAll?pn=${pageInfo.pageNum-1}"
                           aria-label="Previous">
                            <span aria-hidden="true">&laquo;</span>
                        </a>
                    </li>
                    <c:forEach items="${pageInfo.navigatepageNums }" var="page_Num">
                        <c:if test="${page_Num == pageInfo.pageNum }">
                            <li class="active"><a href="#">${ page_Num}</a></li>
                        </c:if>
                        <c:if test="${page_Num != pageInfo.pageNum }">
                            <li>
                                <a href="${pageContext.request.contextPath}/question/findAll?pn=${ page_Num}">${ page_Num}</a>
                            </li>
                        </c:if>
                    </c:forEach>
                    <li>
                        <a href="${pageContext.request.contextPath}/question/findAll?pn=${pageInfo.pageNum+1}"
                           aria-label="Next">
                            <span aria-hidden="true">&raquo;</span>
                        </a>
                    </li>
                </ul>
            </nav>
        </div>