分页 代码

public class PageBean {

	private String url;				//--路径
	
	private int pageNo;				//--当前页号
	
	private int totalRecords;		//--查询总记录数

	private int pageSize = 10;		//--页面显示记录数

	private int totalPages;			//--总页数
	
	private int startRecord;		//--起始记录数
	
	private int endRecord;			//--末记录
	
	private int firstPage = 1;		//--首页
	
	private int lastPage;			//--末页
	
	private int nextPage;			//--下一页
	
	private int prevPage;			//--上一页
	
	private int navStartNo;			//--当前显示的起始页
	
	private int navEndNo;			//--当前显示的最后一页

	private int navSize = 10;		//--页面显示的页数
	
	/**
	 * 
	 * @param pageNo 		当前页号
	 * @param totalRecords	总记录数
	 * @param url			路径
	 * @param pageSize		页面显示记录数(当输入pageSize=0 默认为10 )
	 * @param navSize		页面显示页数 (当输入navSize=0 默认为10 )
	 */
	public PageBean(int pageNo, int totalRecords, String url, int pageSize, int navSize) 
	{
		this.pageNo = pageNo;
		this.totalRecords = totalRecords;
		this.url = url;
		if(pageSize != 0) {
			this.pageSize = pageSize;
		}
		if(navSize != 0) {
			this.navSize = navSize;
		}
		
		this.totalPages = this.totalRecords / this.pageSize;
		if (this.totalRecords % this.pageSize > 0) {
			this.totalPages = this.totalPages + 1;
		}
		
		this.startRecord = (this.pageNo - 1) * this.pageSize;
		this.endRecord = Math.min(this.startRecord + this.pageSize, this.totalRecords);
		this.lastPage = this.totalPages;
		this.nextPage = Math.min(this.pageNo +1, this.lastPage);
		this.prevPage = Math.max(1, this.pageNo - 1);
		
		this.navStartNo = Math.max(1, this.pageNo - this.navSize / 2);
		this.navEndNo = Math.min(this.navStartNo + this.navSize, this.lastPage);
	}
	
	
	public String toString () {
		StringBuffer sb = new StringBuffer();
		
//		if (this.pageNo != this.lastPage && this.totalPages > 10) {
//			sb.append("<a href=\""+this.url+"&pageNo="+this.firstPage+"\">首页</a>");
//			sb.append("  ");
//			sb.append("<a href=\""+this.url+"&pageNo="+this.prevPage+"\">上一页</a>");
//			sb.append("  ");
//		}
		
		if (this.pageNo != 1 && this.totalPages > 10) {
			sb.append("<a href=\""+this.url+"&pageNo="+this.firstPage+"\"> 1 ... </a>");
			sb.append("  ");
		}
		
		for (int i = navStartNo; i <= navEndNo; i++) {
			if (pageNo != i) {
				sb.append("[<a href=\""+this.url+"&pageNo=" +i+ "\">" + i + "</a>]");
				sb.append("  ");

			} else {
				sb.append("[" + i + "]");
				sb.append("  ");
			}
		}
		
//		if (this.pageNo != this.lastPage && this.totalPages > 0) {
//			sb.append("<a href=\""+this.url+"&pageNo="+this.nextPage+"\">下一页</a>");
//			sb.append("  ");
//			sb.append("<a href=\""+this.url+"&pageNo="+this.lastPage+"\">末页</a>");
//			sb.append("  ");
//		}
		
		if (this.pageNo != this.totalPages && this.totalPages > 10) {
			sb.append("<a href=\""+this.url+"&pageNo="+this.lastPage+"\"> ... "+this.lastPage+" </a>");
			sb.append("  ");
		}
		
		String js = "<script language=\"javascript\">function page() {var pageNo = document.getElementById(\"pageNo\").value; if (pageNo<"+this.firstPage+" || pageNo>"+this.totalPages+") {alert(\"你输入的内容超出范围，请重新输入。\"); return false;} else if (!(/^\\d+$/.test(pageNo))) {alert(\"请输入有效的数字\"); return false;} return true;}</script>";
		sb.append("<form action=\""+this.url+"\" method=\"post\" name=\"pageForm\" onsubmit=\"return page()\"><input type=\"text\" name=\"pageNo\" id=\"pageNo\" size=\"4\" value=\""+this.pageNo+"\"/><input type=\"submit\" value=\"跳页\"/></form>");
		System.out.println(sb.toString());
		sb.append(js);
		return sb.toString();
	}


	public String getUrl() {
		return url;
	}


	public void setUrl(String url) {
		this.url = url;
	}


	public int getPageNo() {
		return pageNo;
	}


	public void setPageNo(int pageNo) {
		this.pageNo = pageNo;
	}


	public int getTotalRecords() {
		return totalRecords;
	}


	public void setTotalRecords(int totalRecords) {
		this.totalRecords = totalRecords;
	}


	public int getPageSize() {
		return pageSize;
	}


	public void setPageSize(int pageSize) {
		this.pageSize = pageSize;
	}


	public int getTotalPages() {
		return totalPages;
	}


	public void setTotalPages(int totalPages) {
		this.totalPages = totalPages;
	}


	public int getStartRecord() {
		return startRecord;
	}


	public void setStartRecord(int startRecord) {
		this.startRecord = startRecord;
	}


	public int getEndRecord() {
		return endRecord;
	}


	public void setEndRecord(int endRecord) {
		this.endRecord = endRecord;
	}


	public int getFirstPage() {
		return firstPage;
	}


	public void setFirstPage(int firstPage) {
		this.firstPage = firstPage;
	}


	public int getLastPage() {
		return lastPage;
	}


	public void setLastPage(int lastPage) {
		this.lastPage = lastPage;
	}


	public int getNextPage() {
		return nextPage;
	}


	public void setNextPage(int nextPage) {
		this.nextPage = nextPage;
	}


	public int getPrevPage() {
		return prevPage;
	}


	public void setPrevPage(int prevPage) {
		this.prevPage = prevPage;
	}


	public int getNavStartNo() {
		return navStartNo;
	}


	public void setNavStartNo(int navStartNo) {
		this.navStartNo = navStartNo;
	}


	public int getNavEndNo() {
		return navEndNo;
	}


	public void setNavEndNo(int navEndNo) {
		this.navEndNo = navEndNo;
	}


	public int getNavSize() {
		return navSize;
	}


	public void setNavSize(int navSize) {
		this.navSize = navSize;
	}
	
	
}