『实践』Java Web开发之分页(ajax)

1、需要用到的jar包、js文件

  JSONArray().fromObject()需要的jar包:

(1)commons-beanutils-1.8.3.jar

(2)commons-collections-3.2.1.jar

(3)commons-lang-2.6.jar

(4)commons-logging-1.1.1.jar

(5)ezmorph-1.0.6.jar

(6)json-lib-2.4-jdk15.jar

jqPaginator分页组件:http://jqpaginator.keenwon.com/

(1)jquery-1.11.0.min.js

(2)jqPaginator.min.js

 

2、

 1 public class NewsListPage {
 2 
 3     //当前页码
 4     private int pageIndex;
 5     //每页显示的记录条数
 6     private int pageSize;
 7     //总页数
 8     private int pageCount;
 9     //当前页的数据
10     private List newsList = new ArrayList();
11 } 



   1 //获得分页的新闻信息列表
  public NewsListPage getNewsListPage(int pageSize,int pageIndex){

 3         NewsListPage newsListPage = new NewsListPage();
 4         List newsList = iFrameDao.getNewsList(pageSize, pageIndex);
 5         int count = iFrameDao.getNewsCount(); 7         //计算需要分的页数
 8         int pageCount = 0;
 9         if(count%pageSize == 0){
10             pageCount = count/pageSize;
11         }else{
12             pageCount = count/pageSize + 1;
13         }
14         ......
18         ......22         return newsListPage;
23     }
24     //获得newslist.jsp新闻信息列表
25     public List getNewsList(int pageSize,int pageIndex){
26         List newsList = iFrameDao.getNewsList(pageSize,pageIndex);
27         return newsList;
28     }
29     
30     //获得新闻记录总数
31     public int getNewsCount(){
32         int count = iFrameDao.getNewsCount();
33         return count;
34     }

servlet:

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

        IFrameBll iframeBll = new FrameBll();
        
        // 设定默认的每页显示条数
        int pageSize = 15;
        // 设定默认的页码数
        int pageIndex = 1;
        String currentIndex = request.getParameter("pageIndex");
        if(currentIndex != null){
            pageIndex = Integer.parseInt(currentIndex);
        }
        //获得分页的新闻信息列表
        NewsListPage newsListPage = iframeBll.getNewsListPage(pageSize,pageIndex);
        JSONArray json = null;
        json=new JSONArray().fromObject(newsListPage);
        PrintWriter out = response.getWriter();
        out.write(json.toString());
        out.flush();
        out.close();
    }

js:

/**
 * newslist.jsp
 */
var model = {  
        pageIndex: 1,      //索引页  
        pageSize: 3,      //每页列表的行数  
        //filterCounts: 1,   //筛选后的总行数  
        pageCount: 1,//总页数
    }; 

    $(document).ready(function () {  
        Filter();  
    });
    
    function Filter() {  
        $.ajax({  
            type:"POST",  
            dataType:"json",  
            url:"news.do",   //回发到的页面  
            data:"pageIndex=" + model.pageIndex + "&pageSize=" + model.pageSize,
            //async:false, 
            cache:false, 
            success: function(data) {
                var newsdata = eval(data);
                if (newsdata[0].pageCount == 0 ) {
                        //model.filterCounts = 1;
                }else{
                    model.pageSize = newsdata[0].pageSize;
                    model.pageCount = newsdata[0].pageCount;
                    model.pageIndex = newsdata[0].pageIndex;
                }  
                $("#news").empty();   //清空div中内容
                $("#news").append('
    '+'
'); $.each(newsdata[0].newsList, function (index, content) { 。。。。。 。。。。。 }) paginator(model.pageIndex, model.pageSize,model.pageCount); }, error:function(){ $("#news").empty(); //清空div中内容 $("#news").append('

No Contents

'); } }); } function paginator(pageIndex, pageSize, pageCount) { $.jqPaginator('#jqPaginator', { totalPages: pageCount, visiblePages: 10, currentPage: pageIndex, pageSize: pageSize, first: '
  • First<\/a><\/li>', prev: '
  • Previous<\/a><\/li>', next: '
  • Next<\/a><\/li>', last: '
  • Last<\/a><\/li>', page: '
  • {{page}}<\/a><\/li>', onPageChange: function (n, type) { if (type == 'change' && n != model.pageIndex) { model.pageIndex = n; //点击改变页码时,同步model中的页码 Filter(); //重新生成新表 } } }); }
  • jsp:

              <h2>Newsh2>
                   <div id="news" style="height:350px">
                   <strong><p style="text-indent:2em">No Contentsp>strong>
                   div>
                   <div align="center">
                   <ul class="pagination" id="jqPaginator">ul>
                   div>

    效果图:

    『实践』Java Web开发之分页(ajax)_第1张图片

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