分页查询

 1 package com.pb.pager;
 2 
 3 public class Pager {
 4     /**
 5      * 总页数
 6      */
 7     private int totalcount = 0;
 8     /**
 9      * 页面大小，即每页显示记录数
10      */
11     private int pageSize = 0;
12     /**
13      * 记录总数
14      */
15     private int recordCount = 0;
16     
17     /**
18      * 当前页号
19      */
20     private int currPageNo=0;
21 
22     public int getCurrPageNo() {
23         if(totalcount==0)
24             return 0;
25         return currPageNo;
26     }
27 
28     public void setCurrPageNo(int currPageNo) {
29         if(currPageNo>0)
30         this.currPageNo = currPageNo;
31     }
32 
33     public int getTotalcount() {
34         return totalcount;
35     }
36 
37     public void setTotalcount(int totalcount) {
38         this.totalcount = totalcount;
39     }
40 
41     public int getPageSize() {
42         return pageSize;
43     }
44 
45     public void setPageSize(int pageSize) {
46         if (pageSize > 0)
47             this.pageSize = pageSize;
48     }
49 
50     public int getRecordCount() {
51         return recordCount;
52     }
53 
54     public void setRecordCount(int recordCount) {
55         if (recordCount > 0)
56             this.recordCount = recordCount;
57     }
58 
59     // 设置总页数
60     private void setTotalpagecount() {
61         if (this.recordCount % this.pageSize == 0) {
62             this.recordCount = this.recordCount / this.pageSize;
63         } else if (this.recordCount % this.pageSize > 0) {
64             this.recordCount = this.recordCount / this.pageSize + 1;
65         }else{            
66             this.recordCount=0;
67         }    
68     }
69     /**
70      * 开始记录数
71      * @return
72      */
73     public int getStartRow(){
74         return (currPageNo-1)*pageSize+1;
75         
76     }
77     /**
78      * 结束记录数
79      * @return
80      */
81     public int getEndRow(){
82         return currPageNo*pageSize;
83         
84     }
85 }