package com.jpcf.db.helper; import java.math.*; public class Pager {
private int totalRows; //總行數(shù)
private int pageSize = 10; //每頁(yè)顯示的行數(shù)
private int currentPage; //當(dāng)前頁(yè)號(hào)
private int totalPages; //總頁(yè)數(shù)
private int startRow; //當(dāng)前頁(yè)在數(shù)據(jù)庫(kù)中的起始行 public Pager() {
} public Pager(int _totalRows) {
totalRows = _totalRows;
totalPages=totalRows/pageSize;
int mod=totalRows%pageSize;
if(mod>0){
totalPages++;
}
currentPage = 1;
startRow = 0;
} public int getStartRow() {
return startRow;
} public int getTotalPages() {
return totalPages;
} public int getCurrentPage() {
return currentPage;
} public int getPageSize() {
return pageSize;
} public void setTotalRows(int totalRows) {
this.totalRows = totalRows;
} public void setStartRow(int startRow) {
this.startRow = startRow;
} public void setTotalPages(int totalPages) {
this.totalPages = totalPages;
} public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
} public void setPageSize(int pageSize) {
this.pageSize = pageSize;
} public int getTotalRows() {
return totalRows;
} public void first() { //首頁(yè)
currentPage = 1;
startRow = 0;
} public void previous() { //上一頁(yè)
if (currentPage == 1) {
return;
}
currentPage--;
startRow = (currentPage - 1) * pageSize;
} public void next() { //下一頁(yè)
if (currentPage < totalPages) {
currentPage++;
}
startRow = (currentPage - 1) * pageSize;
} public void last() { //尾頁(yè)
currentPage = totalPages;
startRow = (currentPage - 1) * pageSize;
} public void refresh(int _currentPage) {
currentPage = _currentPage;
if (currentPage > totalPages) {
last();
}
} } | 
