pagecontroller.java

struts分页示例

package prj13_1;

import java.util.ArrayList;

//负责传入一个大的集合，根据页号返回所需要的数据
/*
 * 页数=  
		记录条数%每页条数＝＝0     记录条数/每页条数
		否则          记录条数/每页条数+1
		第N页显示第几条记录(记录从0开始算)? (N-1)*每页条数=<序号< N*每页条数
 * */
public class PageController {
	private ArrayList bigList;			//大的集合，外界传入
	private int curentPageIndex = 1;	//当前页号，外界传入
	private int countPerpage 	= 5;	//每页条数，外界可以设定
	private ArrayList smallList;		//小的集合，返回
	private int pageCount;				//页数
	private int recordCount;			//记录条数
	private int prePageIndex;			//上一页序号
	private int nextPageIndex;			//下一页序号
	private boolean firstPage;			//是否第一页
	private boolean lastPage;			//是否最后一页
	
	public void setCurentPageIndex(int curentPageIndex) {	//每当页数改变，都会调用这个函数，筛选代码可以写在这里		
		this.curentPageIndex = curentPageIndex;
		
		//上一页，下一页确定
		prePageIndex = curentPageIndex - 1;
		nextPageIndex = curentPageIndex + 1;
		//是否第一页，最后一页
		if(curentPageIndex==1){
			firstPage = true;
		}
		else{
			firstPage = false;
		}
		if(curentPageIndex==pageCount){
			lastPage = true;
		}
		else{
			lastPage = false;
		}
		//筛选工作
		smallList = new ArrayList();
		for(int i=(curentPageIndex-1)*countPerpage; i<curentPageIndex*countPerpage&&i<recordCount; i++){
			smallList.add(bigList.get(i));
		}	
	}
	public int getCurentPageIndex() {
		return curentPageIndex;
	}
	public ArrayList getBigList() {
		return bigList;
	}
	public void setBigList(ArrayList bigList) {
		this.bigList = bigList;
		//计算条数
		recordCount = bigList.size();
		//计算页数
		if(recordCount%countPerpage==0){
			pageCount = recordCount/countPerpage;
		}
		else{
			pageCount = recordCount/countPerpage + 1;
		}
		
	}
	public int getCountPerpage() {
		return countPerpage;
	}
	public void setCountPerpage(int countPerpage) {
		this.countPerpage = countPerpage;
	}
	public ArrayList getSmallList() {
		return smallList;
	}
	public void setSmallList(ArrayList smallList) {
		this.smallList = smallList;
	}
	public int getPageCount() {
		return pageCount;
	}
	public void setPageCount(int pageCount) {
		this.pageCount = pageCount;
	}
	public int getRecordCount() {
		return recordCount;
	}
	public void setRecordCount(int recordCount) {
		this.recordCount = recordCount;
	}
	public int getNextPageIndex() {
		return nextPageIndex;
	}
	public void setNextPageIndex(int nextPageIndex) {
		this.nextPageIndex = nextPageIndex;
	}
	public int getPrePageIndex() {
		return prePageIndex;
	}
	public void setPrePageIndex(int prePageIndex) {
		this.prePageIndex = prePageIndex;
	}
	public boolean isFirstPage() {
		return firstPage;
	}
	public void setFirstPage(boolean firstPage) {
		this.firstPage = firstPage;
	}
	public boolean isLastPage() {
		return lastPage;
	}
	public void setLastPage(boolean lastPage) {
		this.lastPage = lastPage;
	}
	

}