Ajax分页插件Pagination从前台jQuery到后端java总结

var pageSize =6; //每页显示多少条记录
var total; //总共多少记录
 $(function() {
 Init(0); //注意参数，初始页面默认传到后台的参数，第一页是0; 
 $("#Pagination").pagination(total, { //total不能少 
 callback: PageCallback, 
 prev_text: '上一页', 
 next_text: '下一页', 
 items_per_page: pageSize, 
 num_display_entries: 4, //连续分页主体部分显示的分页条目数
 num_edge_entries: 1, //两侧显示的首尾分页的条目数 
 }); 
 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。 
 Init(index); 
 }
 });
 
 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。
 $.ajax({
 type: "post",
 url:"../getContentPaixuServ?Cat="+str+"&rows="+pageSize+"&page="+pageIndex,
 async: false,
 dataType: "json",
 success: function (data) {
 $(".neirong").empty();
/* total = data.total; */
 var array = data.rows;
 for(var i=0;i<array.length;i++){
 var info=array[i];
 
 if(info.refPic != null){
 $(".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>') 
 }else{
 $(".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>');
 };
 } 
 },
 error: function () {
 alert("请求超时，请重试！");
 }
 }); 
};

public void doPost(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException {

 response.setContentType("text/html;charset=utf-8");
 PrintWriter out = response.getWriter();
 //获取分页参数
 String p=request.getParameter("page"); //当前第几页（点击获取）
 int page=Integer.parseInt(p);
 
 String row=request.getParameter("rows"); //每页显示多少条记录
 int rows=Integer.parseInt(row);
 
 String s=request.getParameter("Cat"); //栏目ID
 int indexId=Integer.parseInt(s);
 JSONObject object=(new ContentService()).getContentPaiXuById(indexId, page, rows); 
 out.print(object);
 out.flush();
 out.close();
 }

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;
 }

//获取出每页的内容 从哪个ID开始到哪个ID结束。
 private List<Content> paginationContent(List<Content> list,int page,int rows){
 List<Content>small=new ArrayList<Content>();
 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！
 System.out.println(beginIndex);
 int endIndex;
 if(rows*(page+1)>list.size()){ 
 endIndex=list.size(); 
 }
 else{
 endIndex=rows*(page+1);
 }
 for(int i=beginIndex;i<endIndex;i++){ 
 small.add(list.get(i)); 
 } 
 return small;
 }

public List selectIndexById(int indexId){
 List<Content>list=new ArrayList<Content>();
 try{
 conn = DBConn.getCon();
 String sql = "select * from T_Content,T_User where T_Content.AuthorId = T_User.UserId and CatlogId=? order by CreateDate desc";
 pstm = conn.prepareStatement(sql);
 pstm.setInt(1, indexId);
 rs = pstm.executeQuery();
 SimpleDateFormat ff=new SimpleDateFormat("yyyy年MM月dd日 hh时mm分");
 while(rs.next()){
 Content content = new Content();
 content.setContentId(rs.getInt("ContentId"));
  content.setCaption(rs.getString("Caption"));
  content.setCreateDate(f.format(rs.getTimestamp("CreateDate")));
  content.setTimes(rs.getInt("Times"));
  content.setSource(rs.getString("Source"));
  content.setText(rs.getString("Text"));
  content.setPic(rs.getString("Pic"));
  content.setRefPic(rs.getString("RefPic"));
  content.setHot(rs.getInt("Hot"));
  User user = new User();
  user.setUserId(rs.getInt("UserId"));
  content.setAuthorId(user);
  Catlog catlog = new Catlog(); //CntURL待开发
  catlog.setCatlogId(rs.getInt("CatlogId"));
  content.setCatlog(catlog);
  list.add(content);
 }
 }catch(Exception e){
 e.printStackTrace();
 }finally{
 DBConn.closeDB(conn, pstm, rs);
 }
 return list;
 }