Springmvc应用Mongodb分页实现

//每页显示五条 
  protected static final int PAGE_SIZE = 8; 
  /** 
   * 通过条件查询,查询分页结果 
   */ 
  public Pagination<T> getPage(int currentPage, Query query) { 
    //获取总条数 
    long totalCount = this.mongoTemplate.count(query, this.getEntityClass()); 
    //总页数 
    int totalPage = (int) (totalCount/PAGE_SIZE); 
     
    int skip = (currentPage-1)*PAGE_SIZE; 
     
    Pagination<T> page = new Pagination<T>(currentPage, totalPage, (int)totalCount); 
    query.skip(skip);// skip相当于从那条记录开始 
    query.limit(PAGE_SIZE);// 从skip开始,取多少条记录 
     
    List<T> datas = this.find(query); 
     
    page.build(datas);//获取数据   
     
    return page; 
  } 

@Service 
public class VideoMongodbDao extends MongodbBaseDao<Video> { 
 
  @Override 
  protected Class<Video> getEntityClass() { 
    return Video.class; 
  } 
} 

public class Pagination<T> { 
 
  /** 每页显示条数 */ 
  private Integer pageSize = 8; 
 
  /** 当前页 */ 
  private Integer currentPage = 1; 
 
  /** 总页数 */ 
  private Integer totalPage = 1; 
 
  /** 查询到的总数据量 */ 
  private Integer totalNumber = 0; 
 
  /** 数据集 */ 
  private List items; 
 
  public Integer getPageSize() { 
 
    return pageSize; 
  } 

/** 
   * 处理查询后的结果数据 
   * 
   * @param items 
   *      查询结果集 
   * @param count 
   *      总数 
   */ 
  public void build(List items) { 
    this.setItems(items); 
    int count = this.getTotalNumber(); 
    int divisor = count / this.getPageSize(); 
    int remainder = count % this.getPageSize(); 
    this.setTotalPage(remainder == 0 ? divisor == 0 ? 1 : divisor : divisor + 1); 
  } 

Query query = new Query(); 
    
    Criteria channleIdCri = Criteria.where("channelId").is(channel_id);  
    query.addCriteria(channleIdCri);  
    //获取当前页 
    String currentPageStr = request.getParameter("currentPage"); 
    int currentPage = 0; 
    if (currentPageStr != null ){ 
    currentPage = Integer.valueOf(currentPageStr); 
    } 
 
    Pagination<Video> videos = dao.getPage(currentPage, query); 
    m.addAttribute("videos", videos);//from 

public class PaginationTag extends TagSupport { 
  /** 列表页面的form标签id值 */ 
  private String form; 
   
  /** 与后台交互，保存在request中的 数据，该数据包含l */ 
  private String pageInfo;//request对应的bean包含了分页的一些数据 
   
  /** 分页显示可点击页数的长度 */ 
  private int size; 
   
  public PaginationTag(){ 
    this.form = "form"; 
    this.size = 5; 
  } 

@Override 
  public int doStartTag() throws JspException { 
    int half = size / 2; 
    int point = size / 2 + size % 2; 
    int start = 1; 
    int loop = size;     
    Pagination query = (Pagination) this.pageContext.getRequest().getAttribute(pageInfo);   
    int pageSize = query.getPageSize(); 
    int currentPage = query.getCurrentPage(); 
    int totalPage = query.getTotalPage(); 
    long totalNumber = query.getTotalNumber();    
    if(totalPage <= size){ 
      start = 1; 
      loop = totalPage; 
    }else{ 
      if(currentPage > point && currentPage < totalPage - half + 1){ 
        start = 1 + (currentPage - point); 
      }else if(currentPage > totalPage - half){ 
        start = totalPage - size + 1; 
      } 
    } 
       
    if(currentPage<=0){ 
      currentPage = 1; 
    } 
    StringBuilder sb = new StringBuilder(); 
    sb.append("<div class=\"box-ttl\"><div class=\"g4\">共 <span class=\"text-info\">"); 
    sb.append(totalNumber).append("</span> 条数据"); 
    sb.append("/共 <span class=\"text-info\">"); 
    if(totalNumber!=0){ 
      sb.append(totalPage).append("</span> 页！</div><div class=\"box collapsed g6 flt-r\"><ul class=\"nav-menu\">"); 
    }else{ 
      sb.append(0).append("</span> 页！</div><div class=\"box collapsed g6 flt-r\"><ul class=\"nav-menu\">"); 
    }     
    // 处理上一页 
    if(currentPage == 1){ 
      sb.append("<li class=\"disabled\"><a href=\"#\">上一页</a></li>"); 
    }else{ 
      sb.append("<li><a href=\"javascript:dopage(" + (currentPage - 1) + ",'" + form + "');\">上一页</a></li>"); 
    }     
    // 处理中间数据 
    for(int i = start; i < start + loop; i++){ 
      //<li class="active"><a href="#" rel="external nofollow" rel="external nofollow" >1</a></li> 
      if(currentPage == i){ 
        sb.append("<li class=\"active\"><a href=\"#\">" + i + "</a></li>"); 
      }else{ 
        //<li><a href="#" rel="external nofollow" rel="external nofollow" >2</a></li> 
        sb.append("<li><a href=\"javascript:dopage(" + i + ",'" + form + "');\">" + i + "</a></li>"); 
      } 
    }     
    // 处理下一页 
    if(currentPage == totalPage){ 
      sb.append("<li class=\"disabled\"><a href=\"#\">下一页</a></li>"); 
    }else{ 
      sb.append("<li><a href=\"javascript:dopage(" + (currentPage + 1) + ",'" + form + "');\">下一页</a></li>"); 
    } 
         
    sb.append("</ul></div></div>"); 
 
    sb.append("<input type=\"hidden\" id=\"currentPage\" name=\"currentPage\" value=\"" + currentPage + "\"/>"); 
     
    try { 
      pageContext.getOut().write(sb.toString()); 
    } catch (IOException e) { 
      throw new JspException(e.toString(), e); 
    }       
    return super.doStartTag(); 
  } 

function dopage(currentPage,formid){ 
  $("#currentPage").val(currentPage); 
  $("#" + formid).submit(); 
} 

<div> 
  <tv:pagination pageInfo="videos" form="video-form" size="5"></tv:pagination>  
</div>