page.java

可以实现在线考试

package vo;

public class Page {
	
	private int pageSize=1;//页面大小--->不可变
	private int totalPages;//总页数--->不可变
	private int totalRows;//总行数--->不可变
	private int startRows;//起始行数--->可变
	private int currentPage;//当前页--->可变
	
	public Page(int _totalRows)
	{
		this.totalRows = _totalRows;
		this.totalPages = totalRows/pageSize;
		if(totalRows%pageSize != 0)
		{
			totalPages++;
		}
		startRows = 1;
		currentPage = 1;
	}

	public int getCurrentPage() {
		return currentPage;
	}
	
	public int getPageSize()
	{
		return pageSize;
	}

	public int getStartRows() {
		return startRows;
	}
	
	public int getTotalPages() {
		return totalPages;
	}
	
	//前一页
	public void Privous(int _currentPage)
	{ 
		if(_currentPage <= 1)
		{
			currentPage = 1;
		}
		else
		{
			currentPage = _currentPage-1;
		}
		startRows = (currentPage-1)*pageSize +1;
	}
	//后一页
	public void Next(int _currentPage)
	{ 
		if(_currentPage >= totalPages)
		{
			currentPage = totalPages;
		}
		else
		{
			currentPage = _currentPage+1;
		}
		startRows = (currentPage-1)*pageSize +1;
	}
	//首页
	public void First()
	{ 
		currentPage = 1;
		startRows = (currentPage-1)*pageSize +1;
	}
	//末页
	public void Last()
	{ 
	    currentPage = totalPages;
		startRows = (currentPage-1)*pageSize +1;
	}
	
	//选择
	public void Select(int _currentPage)
	{
		 currentPage = _currentPage;
	     startRows = (currentPage-1)*pageSize +1;
	}
}