开发J2EE程序的分页类-1

package com.zcg.onlineexam.util;

public class Pager {

private int totalSize;//总记录数
private int totalPage;//总页数
private int currentPage;//当前页
private boolean hasFirst;//首页?
private boolean hasPrevious;//前一页?
private boolean hasNext;//下一页?
private boolean hasLast;//末页?

public Pager(int currentPage, int totalSize) {
this.currentPage = currentPage;
this.totalSize = totalSize;
}

public int getTotalSize() {
return totalSize;
}

public void setTotalSize(int totalSize) {
this.totalSize = totalSize;
}

public int getTotalPage() {
totalPage = totalSize / Constants.PAGE_MAX_SIZE;
if (totalSize % Constants.PAGE_MAX_SIZE != 0)
totalPage++;
return totalPage;
}

public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}

public int getCurrentPage() {

if (currentPage < 0) {
return 1;
} else {
return currentPage = ((currentPage <= totalPage) ? currentPage
: totalPage);
}
}

public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}

public boolean getHasFirst() {
this.hasFirst = (currentPage != 1);
return hasFirst;
}

public void setHasFirst(boolean hasFirst) {
this.hasFirst = hasFirst;
}

public boolean getHasPrevious() {
this.hasPrevious = getHasFirst();
return this.hasPrevious;
}

public void setHasPrevious(boolean hasPrevious) {
this.hasPrevious = hasPrevious;
}

public boolean getHasNext() {
this.hasNext = getHasLast();
return this.hasNext;
}

public void setHasNext(boolean hasNext) {
this.hasNext = hasNext;
}

public boolean getHasLast() {
this.hasLast = (currentPage != getTotalPage());
return hasLast;
}

public void setHasLast(boolean hasLast) {
this.hasLast = hasLast;
}
}