分页查询（PageHelper插件）

spring boot+mybatis+jquery + thmeleaf +PageHelper做分页查询

分页插件配置时，依赖包

                     <dependency>
	<groupId>com.github.pagehelper</groupId>
	<artifactId>pagehelper-spring-boot-starter</artifactId>
	<version>1.2.9</version>
                    </dependency>

Dao层

@Select("select * from student")
     List<Student> listu();

Service 层

@Override
    public List<Student> listu() {
        return studentDao.listu();
    }

@Override
    public List<Student> queryUserList(Integer page, Integer limit) {
        PageHelper.startPage(page,limit);
        return  studentDao.listu();                            //查询必须跟在startPage之后，中间不能放任何语句
}

Controller层

 @RequestMapping("/queryAll")
    public String list(Map<String,Object> map) {
        List<Student> list = iStudentService.listu();
        //list.stream().forEach(x->System.out.println(x));
        map.put("list", list);
        return "show";
    }

@RequestMapping("/findCommodityAction_1")
public String findCommodityAction_1 (Model model , Integer page , Integer limit){
    List<Student> students=iStudentService.queryUserList (page , limit);
    //然后把查询出来的数据放到插件自带的PageInfo对象里面;

    PageInfo<Student> pageInfo = new PageInfo<Student>(students);
    System.out.println(pageInfo);

    model.addAttribute ("pageInfo" , pageInfo);
    return "show";
}

前端jquery 页面

<div id="ye">
        <p>当前第  <td th:text="${pageInfo.pageNum}"></td> 页,总 <td th:text="${pageInfo.pages}"></td> 页,共<td th:text="${pageInfo.total}"></td> 条记录</p>
        <p>
            <a th:href="@{/findCommodityAction_1?page=1&limit=6}">首页</a>
            <a th:if="${pageInfo.hasPreviousPage}" th:href="@{'/findCommodityAction_1?page=' + ${pageInfo.pageNum - 1} + '&limit=6'}">上一页</a>
            <a th:if="${pageInfo.hasNextPage}" th:href="@{'/findCommodityAction_1?page=' + ${pageInfo.pageNum + 1} + '&limit=6'}">下一页</a>
            <a th:href="@{'/findCommodityAction_1?page=' + ${pageInfo.pages} + '&limit=6'}">末页</a>
        </p>
    </div>

（在后端进入页面时必须输入?page=1&limit=6 才能找到页面）