struts2spring3hibernate3集成1
PageBean
package bean;

import java.util.List;

public class PageBean {

private List list; //要返回的某一页的记录列表

private int allRow; //总记录数
private int totalPage; //总页数
private int currentPage; //当前页
private int pageSize; //每页记录数

private boolean isFirstPage; //是否为第一页
private boolean isLastPage; //是否为最后一页
private boolean hasPreviousPage; //是否有前一页
private boolean hasNextPage; //是否有下一页


public List getList() {
return list;
}
public void setList(List list) {
this.list = list;
}
public int getAllRow() {
return allRow;
}
public void setAllRow(int allRow) {
this.allRow = allRow;
}
public int getTotalPage() {
return totalPage;
}
public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}
public int getCurrentPage() {
return currentPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}

/** *//**
* 初始化分页信息
*/
public void init(){
this.isFirstPage = isFirstPage();
this.isLastPage = isLastPage();
this.hasPreviousPage = isHasPreviousPage();
this.hasNextPage = isHasNextPage();
}

/** *//**
* 以下判断页的信息,只需getter方法(is方法)即可
* @return
*/

public boolean isFirstPage() {
return currentPage == 1; // 如是当前页是第1页
}
public boolean isLastPage() {
return currentPage == totalPage; //如果当前页是最后一页
}
public boolean isHasPreviousPage() {
return currentPage != 1; //只要当前页不是第1页
}
public boolean isHasNextPage() {
return currentPage != totalPage; //只要当前页不是最后1页
}


/** *//**
* 计算总页数,静态方法,供外部直接通过类名调用
* @param pageSize 每页记录数
* @param allRow 总记录数
* @return 总页数
*/
public static int countTotalPage(final int pageSize,final int allRow){
int totalPage = allRow % pageSize == 0 ? allRow/pageSize : allRow/pageSize+1;
return totalPage;
}

/** *//**
* 计算当前页开始记录
* @param pageSize 每页记录数
* @param currentPage 当前第几页
* @return 当前页开始记录号
*/
public static int countOffset(final int pageSize,final int currentPage){
final int offset = pageSize*(currentPage-1);
return offset;
}

/** *//**
* 计算当前页,若为0或者请求的URL中没有"?page=",则用1代替
* @param page 传入的参数(可能为空,即0,则返回1)
* @return 当前页
*/
public static int countCurrentPage(int page){
final int curPage = (page==0?1:page);
return curPage;
}
}
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