Pagination(分页) 从前台到后端总结

 1 var pageSize =6;     //每页显示多少条记录
 2 var total;           //总共多少记录
 3  $(function() {
 4     Init(0); //注意参数，初始页面默认传到后台的参数，第一页是0;    
 5         $("#Pagination").pagination(total, {   //total不能少        
 6              callback: PageCallback,            
 7              prev_text: '上一页',             
 8              next_text: '下一页',              
 9              items_per_page: pageSize,              
10              num_display_entries: 4,        //连续分页主体部分显示的分页条目数
11              num_edge_entries: 1,           //两侧显示的首尾分页的条目数 
12          });             
13         function PageCallback(index, jq) {     //前一个表示您当前点击的那个分页的页数索引值，后一个参数表示装载容器。  
14              Init(index);      
15         }
16     });
17  
18  function Init(pageIndex){      //这个参数就是点击的那个分页的页数索引值，第一页为0，上面提到了，下面这部分就是AJAX传值了。
19      $.ajax({
20         type: "post",
21       url:"../getContentPaixuServ?Cat="+str+"&rows="+pageSize+"&page="+pageIndex,
22       async: false,
23       dataType: "json",
24       success: function (data) {
25             $(".neirong").empty();
26 /*             total = data.total; */
27             var array = data.rows;
28             for(var i=0;i<array.length;i++){
29                 var info=array[i];
30                 
31                 if(info.refPic != null){
32                 $(".neirong").append('<dl><h3><a href="'+info.CntURL+'?ContentId='+info.contentId+'" title="'+info.caption+'" >'+info.caption+'</a></h3><dt><a href="sjjm.jsp?ContentId='+info.contentId+'" title="'+info.caption+'" ><img src="<%=basePathPic%>'+info.refPic+'" alt="'+info.caption+' width="150" height="95""></a></dt>  <dd class="shortdd">'+info.text+'</dd><span>发布时间：'+info.createDate+'</span></dl>') 
33                 }else{
34                 $(".neirong").append('<dl ><h3><a href="'+info.CntURL+'?ContentId='+info.contentId+'" title="'+info.caption+'" >'+info.caption+'</a></h3><dd class="shortdd">'+info.text+'</dd><span>发布时间：'+info.createDate+'</span></dl>');
35                 };
36          }       
37       },
38       error: function () {
39           alert("请求超时，请重试！");
40       }
41     });  
42 };

 1     public void doPost(HttpServletRequest request, HttpServletResponse response)
 2             throws ServletException, IOException {
 3 
 4         response.setContentType("text/html;charset=utf-8");
 5         PrintWriter out = response.getWriter();
 6         //获取分页参数
 7         String p=request.getParameter("page"); //当前第几页（点击获取）
 8         int page=Integer.parseInt(p);
 9         
10         String row=request.getParameter("rows");    //每页显示多少条记录
11         int    rows=Integer.parseInt(row);
12         
13         String s=request.getParameter("Cat");   //栏目ID
14         int indexId=Integer.parseInt(s);
15         JSONObject object=(new ContentService()).getContentPaiXuById(indexId, page, rows);        
16         out.print(object);
17         out.flush();
18         out.close();
19     }

    public JSONObject getContentPaiXuById(int indexId, int page, int rows) {
        JSONArray array=new JSONArray();
        List<Content>contentlist1=(new ContentDao()).selectIndexById(indexId);
        List<Content>contentlist=paginationContent(contentlist1,page,rows);
        for(Content content:contentlist){
            JSONObject object=new JSONObject();
            object.put("contentId", content.getContentId());
            object.put("caption", content.getCaption());
            object.put("createDate", content.getCreateDate());
            object.put("times", String.valueOf(content.getTimes()));
            object.put("source", content.getSource());
            object.put("text", content.getText());
            object.put("pic", content.getPic());
            object.put("refPic", content.getRefPic());
            object.put("hot", content.getHot());
            object.put("userId", content.getAuthorId().getUserId());
            int id = content.getAuthorId().getUserId();
            String ShowName = (new UserService()).selectUserById(id).getString("ShowName");
            object.put("showName", ShowName);
            array.add(object);
            
        }
        JSONObject obj=new JSONObject();
        obj.put("total", contentlist1.size());
        obj.put("rows", array);
        return obj;
    }

 1     //获取出每页的内容 从哪个ID开始到哪个ID结束。
 2     private List<Content> paginationContent(List<Content> list,int page,int rows){
 3         List<Content>small=new ArrayList<Content>();
 4         int beginIndex=rows*page;       //rows是每页显示的内容数，page就是我前面强调多次的点击的分页的页数的索引值，第一页为0，这样子下面就好理解了！
 5         System.out.println(beginIndex);
 6         int endIndex;
 7         if(rows*(page+1)>list.size()){   
 8             endIndex=list.size();        
 9         }
10         else{
11             endIndex=rows*(page+1);
12         }
13         for(int i=beginIndex;i<endIndex;i++){  
14             small.add(list.get(i));  
15         }  
16         return small;
17     }

 1      public List selectIndexById(int indexId){
 2          List<Content>list=new ArrayList<Content>();
 3          try{
 4              conn = DBConn.getCon();
 5              String sql = "select * from T_Content,T_User where T_Content.AuthorId = T_User.UserId and CatlogId=? order by CreateDate desc";
 6              pstm = conn.prepareStatement(sql);
 7              pstm.setInt(1, indexId);
 8              rs = pstm.executeQuery();
 9              SimpleDateFormat ff=new SimpleDateFormat("yyyy年MM月dd日 hh时mm分");
10              while(rs.next()){
11                 Content content = new Content();
12                 content.setContentId(rs.getInt("ContentId"));
13                  content.setCaption(rs.getString("Caption"));
14                  content.setCreateDate(f.format(rs.getTimestamp("CreateDate")));
15                  content.setTimes(rs.getInt("Times"));
16                  content.setSource(rs.getString("Source"));
17                  content.setText(rs.getString("Text"));
18                  content.setPic(rs.getString("Pic"));
19                  content.setRefPic(rs.getString("RefPic"));
20                  content.setHot(rs.getInt("Hot"));
21                  User user = new User();
22                  user.setUserId(rs.getInt("UserId"));
23                  content.setAuthorId(user);
24                  Catlog catlog = new Catlog();                //CntURL待开发
25                  catlog.setCatlogId(rs.getInt("CatlogId"));
26                  content.setCatlog(catlog);
27                  list.add(content);
28              }
29          }catch(Exception e){
30              e.printStackTrace();
31          }finally{
32              DBConn.closeDB(conn, pstm, rs);
33          }
34          return list;
35      }