struts + jdbc的分页程序.doc

package common.util; import java.util.*; public class PageController implements IPageModel { private Collection model; //数据总行数 private int totalRowCount = 0; // //总页数 private int pageCount = 0; //每页应显示的行数 private int maxPageRowCount = 0; //当前页行数 private int currPageRowCount = 0; //当前页号 private int currPageNum; //默认构造 public PageController() { super(); } //传入模型 public PageController(Collection model) { setPageController(model); } //设一个分页模型 public void setPageController(Collection model) { this.model = model; this.totalRowCount = model.size(); } /** * 总页数 * @return int */ public int getPageCount() { return this.pageCount; } /** * getPageContents * * @param intPageNum int * @return Object */ public Object getPageContents(int intPageNum) { //非法数据 if(intPageNum1){ intPageNum=1; } if(intPageNumpageCount){ intPageNum=pageCount; } //指定当前页 this.currPageNum=intPageNum; int i = 0; ArrayList arr = new ArrayList(); //如果是合法的范围 if (intPageNum 0 intPageNum = pageCount) { //计算该页的开始号和结束号 int lfromrow = (intPageNum - 1) * maxPageRowCount; arr = (ArrayList) getElementsAt(model, lfromrow, lfromrow + maxPageRowCount-1); } currPageNum=intPageNum; return arr; } public Object getLastPage() { return this.getPageContents(pageCount); } public Object getFirstPage() { return this.getPageContents(0); } /** * getCurrentPageRowsCount * * @return int */ public int getCurrentPageRowsCount() { if(currPageNumpageCount){ return maxPageRowCount; } else{//最后一页 return totalRowCount-(pageCount-1)*maxPageRowCount; } } public int getCurrentPageNum(){ return currPageNum; } /** * setMaxPageRows * * @return int */ public void setMaxPageRows(int rowCount) { maxPageRowCount = rowCount; //计算总页数 if (totalRowCount % maxPageRowCount 0) { /