强大的Hibernate分页实现（jsp可以多种表现形式）

1、项目中使用QueryResult（自己定义的类）实现分类，此类用List记录了每页显示的结果，用一个long类型记录了符合条件的结果总数：

package com.gdpu.page.vo;
 2 
 3  import java.util.List;
 4 
 5  publicclass QueryResult<T> {
 6 private List<T> resultlist;
 7 privatelong totalrecord;
 8     
 9 public List<T> getResultlist() {
10 return resultlist;
11     }
12 publicvoid setResultlist(List<T> resultlist) {
13 this.resultlist = resultlist;
14     }
15 publiclong getTotalrecord() {
16 return totalrecord;
17     }
18 publicvoid setTotalrecord(long totalrecord) {
19 this.totalrecord = totalrecord;
20     }
21 }

2、用一个PageView封装了分页数据（从QueryResult里List拿出来的），页码开始索引和结束索引（是一个封装了开始索引和结束索引的类PageIndex，这两个字段就像是百度搜索下端的页码开始和结束索引），总页数totalpage（通过总记录数totalrecord和每页最大记录数maxresult计得），每页记录数maxresult（使用默认值），当前页码（和maxresult触发记录开始索引生成，Hibernate分页setFirstResult(...)参数），总记录数totalrecord（从QueryResult的记录拿出来），页码数量pagecode（比如第一页、上一页、下一页、末页的数量）：

package com.gdpu.page.vo;
 2 
 3  import java.util.List;
 4 
 5  publicclass PageView<T> {
 6 /** 分页数据 **/
 7 private List<T> records;
 8 /** 页码开始索引和结束索引 **/
 9 private PageIndex pageindex;
10 /** 总页数 **/
11 privatelong totalpage =1;
12 /** 每页显示记录数 **/
13 privateint maxresult =10;
14 /** 当前页 **/
15 privateint currentpage =1;
16 /** 总记录数 **/
17 privatelong totalrecord;
18 /** 页码数量 **/
19 privateint pagecode =3;
20 /** 要获取记录的开始索引 **/
21 publicint getFirstResult() {
22 return (this.currentpage-1)*this.maxresult;
23     }
24 publicint getPagecode() {
25 return pagecode;
26     }
27 
28 publicvoid setPagecode(int pagecode) {
29 this.pagecode = pagecode;
30     }
31 public PageView(){}
32 
33 public PageView(int maxresult, int currentpage) {
34 this.maxresult = maxresult;
35 this.currentpage = currentpage;
36     }
37     
38 publicvoid setQueryResult(QueryResult<T> qr){
39         setTotalrecord(qr.getTotalrecord());
40         setRecords(qr.getResultlist());
41     }
42     
43 publiclong getTotalrecord() {
44 return totalrecord;
45     }
46 publicvoid setTotalrecord(long totalrecord) {
47 this.totalrecord = totalrecord;
48         setTotalpage(this.totalrecord%this.maxresult==0?this.totalrecord/this.maxresult : this.totalrecord/this.maxresult+1);
49     }
50 public List<T> getRecords() {
51 return records;
52     }
53 publicvoid setRecords(List<T> records) {
54 this.records = records;
55     }
56 public PageIndex getPageindex() {
57 return pageindex;
58     }
59 publiclong getTotalpage() {
60 return totalpage;
61     }
62 publicvoid setTotalpage(long totalpage) {
63 this.totalpage = totalpage;
64 this.pageindex = PageIndex.getPageIndex(pagecode, currentpage, totalpage);
65     }
66 publicint getMaxresult() {
67 return maxresult;
68     }
69 publicint getCurrentpage() {
70 return currentpage;
71     }
72 publicvoid setCurrentpage(int currentpage){
73 this.currentpage=currentpage;
74     }
75 }

package com.gdpu.page.vo;
 2 
 3  publicclass PageIndex {
 4 privatelong startindex;
 5 privatelong endindex;
 6     
 7 public PageIndex(long startindex, long endindex) {
 8 this.startindex = startindex;
 9 this.endindex = endindex;
10     }
11 publiclong getStartindex() {
12 return startindex;
13     }
14 publicvoid setStartindex(long startindex) {
15 this.startindex = startindex;
16     }
17 publiclong getEndindex() {
18 return endindex;
19     }
20 publicvoid setEndindex(long endindex) {
21 this.endindex = endindex;
22     }
23      
24 publicstatic PageIndex getPageIndex(long viewpagecount, int currentPage, long totalpage){
25 long startpage = currentPage-(viewpagecount%2==0? viewpagecount/2-1 : viewpagecount/2);
26 long endpage = currentPage+viewpagecount/2;
27 if(startpage<1){
28                 startpage =1;
29 if(totalpage>=viewpagecount) endpage = viewpagecount;
30 else endpage = totalpage;
31             }
32 if(endpage>totalpage){
33                 endpage = totalpage;
34 if((endpage-viewpagecount)>0) startpage = endpage-viewpagecount+1;
35 else startpage =1;
36             }
37 returnnew PageIndex(startpage, endpage);        
38     }
39 }

3、Action里代码表现形式如下：

private List<CgProject> findAllCgProjectDepRole() {
 2         pageView=new PageView<CgProject>(10,currentpage);//默认是10条记录,第一页;
 3          Teacher teacher=(Teacher)session.getAttribute("teacher");
 4         
 5         QueryResult<CgProject> queryResult=null;
 6 if(teacher.getRole()==1){
 7         queryResult=chengguoService.findAllCgProject(pageView.getFirstResult(),pageView.getMaxresult());
 8         }else{
 9             queryResult=chengguoService.findAllCgProjectByTeacherId(teacher.getTeacherId(),pageView.getFirstResult(),pageView.getMaxresult());
10         }
11         pageView.setQueryResult(queryResult);//触发生成页码等等
12          request.setAttribute("pageView", pageView);
13 return queryResult.getResultlist();
14     }

4、jsp分页部分表现形式如下：

<font >
 2     当前页:第${pageView.currentpage}页 | 总记录数:${pageView.totalrecord}条 | 每页显示:${pageView.maxresult}条 | 总页数:${pageView.totalpage}页</font>　
 3  <c:choose>
 4 <c:when test="${pageView.currentpage==1}"><b><font color="#FFFFFF">第1页</font></c:when>
 5 <c:otherwise><a href="javascript:topage('1')">第1页</a></c:otherwise>
 6 </c:choose>
 7 <c:if test="${pageView.currentpage>2}"><a href="javascript:topage('${pageView.currentpage-1}')">上一页</a></c:if>
 8 <c:if test="${pageView.currentpage!=1&&pageView.currentpage!=pageView.totalpage}"><b><font color="#FFFFFF">第${pageView.currentpage}页</font></b></c:if>
 9 <c:if test="${pageView.currentpage<pageView.totalpage}"><a href="javascript:topage('${pageView.currentpage+1}')">下一页</a></c:if>
10 <c:choose>
11 <c:when test="${pageView.currentpage<pageView.totalpage}"><a href="javascript:topage('${pageView.totalpage}')">末页</a></c:when>
12 <c:otherwise><b><font color="#FFFFFF">末页</font></c:otherwise>
13 </c:choose>

5、至于Hibernate的分页就是调用Session的setFirstResult(int ...)、setMaxResult(int ...)或用hibernateTemplate（需自己扩展）都无所谓。可用此方法分页：http://blog.sina.com.cn/s/blog_7096a4800100pk99.html

 

此分页源码请到以下连接下载：http://download.csdn.net/detail/fzx888888/4141140