在SSM框架下用laypage和ajax实现分页和数据交互的方

<div id="demo"></div> //定义分页
<script type="text/javascript">
var url = "http://localhost:8080/HRM/";
$(document).ready(function(){
  layui.use(['form','laypage', 'layer'], function(){
  var laypage = layui.laypage,layer = layui.layer;
  laypage({
  cont: 'demo', //跟页面前面div的id一样
  pages: ${endPage} , //总页数
  groups: 5 , //连续显示分页数
  jump: function(obj, first){
  //得到了当前页，用于向服务端请求对应数据
  var curr = obj.curr -1;
  var self = this;
  $.ajax({
   //这里省略了ajax数据交互
  });
 });
});
</script>

List<Jobinfo> selectPageInfoByDel(@Param("start") int start); //获取页面数据
int countNumber(); //记录总的条数

<select id="selectPageInfoByDel" resultMap="BaseResultMap" parameterType="java.lang.Integer">
  select id,c_id,job,number,salary,more_salary,date from jobinfo where is_del = 1 order by id DESC limit #{start,jdbcType=INTEGER},8
</select>
<select id="countNumber" resultType="java.lang.Integer">
  select count() from jobinfo where is_del =1
</select>

public class Page<T> implements Serializable {
 private static final long serialVersionUID = 337297181251071639L;
 private Integer page;//当前页
 private Integer rows;//页大小
 private Integer totalRecord;// 总记录数
 private Integer firstPage; //首页
 private Integer endPage; //末页 
 private List<T> list;//页面数据列表
 //这里省略的get和set的方法
}

//查看分页的信息
public List<Jobinfo> selectPageInfo(int page);
//查看所有信息的总数
int getCount();

//这里省略了Dao的实例化，只显示service接口的实现方法
public List<Jobinfo> selectPageInfo(int page) {
 int rows = 8; //一页显示8条数据
 int start = pagerows; //这里表示数据库从第几条数据开始查询（limit从下标0开始）
 return jobDao.selectPageInfoByDel(start);
}
public int getCount() {
 return jobDao.countNumber();
}

@RequestMapping("page")
public @ResponseBody Page<Jobinfo> selectPageInfo(HttpServletRequest request, Model model,@RequestParam("start") int start){
  List<Jobinfo> list= jobinfoService.selectPageInfo(start);
 Page<Jobinfo> pageInfo = new Page<Jobinfo>();
 int count = jobinfoService.getCount(); //获取总数
 int endPage = 0;
 //8条数据为一页
 if(jobinfoService.getCount()%8==0){
  endPage = jobinfoService.getCount()/8;
 }else{
  endPage = jobinfoService.getCount()/8 +1 ;
 } 
 pageInfo.setPage(start+1);
 pageInfo.setTotalRecord(count);
 pageInfo.setList(list);
 pageInfo.setRows(8);
 pageInfo.setFirstPage(1);
 pageInfo.setEndPage(endPage);
 return pageInfo;
}