翻页标签

使用的时候像这样：

<form action="<%=request.getContextPath();%>/pageAction.do" name ="hello" method="post" >
<test:pager formName="hello"/>
</form>

form的action名字随便写，只要给tag传进formname就可以了。
不过组装显示内容的action里要根据从页面得到的(pageIndex/pageTotal/pageNo)来组装内容列表。
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等写完整了把完整的放上来，待续......

/*
 * Created on 2004-8-6
 * author:xmx
 */
package demo.pagetag;

public class PageInfo {

	private int _recordTotal;
	private int _pageTotal;
	private int _currentPage;
	private int _pageSize;

	/**
	 * @return
	 */
	public int getRecordTotal(); {
		return _recordTotal;
	}

	/**
	 * @param i
	 */
	public void setRecordTotal(int i); {
		_recordTotal = i;
	}

	/**
	 * @return
	 */
	public int getCurrentPage(); {
		return _currentPage;
	}

	/**
	 * @return
	 */
	public int getPageTotal(); {
		int tmp=_recordTotal/_pageSize;
		_pageTotal=(_recordTotal%_pageSize==0);?tmp:tmp+1;
		return _pageTotal;
	}

	/**
	 * @param i
	 */
	public void setCurrentPage(int i); {
		_currentPage = i;
	}

	/**
	 * @param i
	 */
	public void setPageTotal(int i); {
		_pageTotal = i;
	}

	/**
	 * @return
	 */
	public int getPageSize(); {
		return _pageSize;
	}

	/**
	 * @param i
	 */
	public void setPageSize(int i); {
		_pageSize = i;
	}

	/**
	 * 返回当前页起始记录
	 * @return
	 */
	public int getStartRecord(); {
		if (_pageTotal == 0); {
			return 0;
		} else {
			return (_currentPage - 1); * _pageSize + 1;
		}
	}
	
	/**
	 * 返回当前页结尾记录
	 * @return
	 */
	public int getEndRecord(); {
		if (_pageTotal == 0); {
			return 0;
		} else if (_pageTotal == _currentPage);{
			return _recordTotal;
		} else {
			return _currentPage * _pageSize ;
		}
	}
}

/*
 * Created on 2004-8-6
 * author:xmx
 */
package demo.pagetag;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.struts.util.RequestUtils;
import org.apache.struts.util.ResponseUtils;



public class PageTag extends TagSupport {	
	protected String name =null;
	protected String formName = null;
	
	

	public String getName(); {
		return name;
	}

	public void setName(String name); {
		this.name = name;
	}
	
	public String getFormName(); {
		return formName;
	}

	public void setFormName(String formName); {
		this.formName = formName;
	}

	/* (non-Javadoc);
	 * @see javax.servlet.jsp.tagext.Tag#doStartTag();
	 */
	public int doStartTag(); throws JspException {
		String pageName = name;
		if (name==null || name.trim();.equals("");); {
			pageName = "pageName";
		}
		PageInfo pInfo = (PageInfo);RequestUtils.lookup(pageContext, pageName, "request");;
		String imagePath = ((HttpServletRequest);pageContext.getRequest(););.getContextPath();;
		
		System.out.println("============== Page tag start ===========");;
		System.out.println("FormName = "+formName.trim(););;
		System.out.println("============== Page tag end ===========");;
		System.out.println();;

		if (pInfo == null);{
			System.out.println("pInfo is null ");;
			return SKIP_BODY;
		}else{
			System.out.println("pInfo.currentPage = "+pInfo.getCurrentPage(););;
		}
			
		
		StringBuffer sb = new StringBuffer();;
		createNavigateBar(sb,pInfo,imagePath);;
		createJSFunction(sb);;
		sb=sb.append("<font size=\"30\" color='red'>hello，小南</font>");;
		ResponseUtils.write(pageContext,sb.toString(););;
		
		return (SKIP_BODY);;
	}
	
	private void createJSFunction(StringBuffer sb); {
		String actionFormName = formName.trim();;		//设置Form的名称
		sb.append("<script language=\"JavaScript\">\n");;
		sb.append("function goPage(pageIndex); {\n");;
		sb.append(actionFormName + ".target=\"_self\";\n");;
		sb.append(actionFormName + ".pageIndex.value=pageIndex;\n");;
		sb.append(actionFormName + ".submit();;\n");;
		sb.append("}\n");;
		
		sb.append("function goToPage(); {\n");;
		sb.append("var page=" + actionFormName + ".pageNo.value;\n");;
		sb.append("if (new Number(page);.toString();==\"NaN\");{\n");;
		sb.append("alert(\"请输入 数 字\");;\n");;
		sb.append("return;\n");;
		sb.append("}else if(page==\"\"||page==null); {\n");;
		sb.append("alert(\"请输入 数 字\");;\n");;
		sb.append("return;\n");;
		sb.append("}\n");;
		sb.append("var pageAmount=" + actionFormName + ".pageTotal.value;\n");;
		sb.append("if (parseInt(page);>parseInt(pageAmount);); {\n");;
		sb.append("page=pageAmount;\n");;
		sb.append("}else if (parseInt(page);<1); {\n");;
		sb.append("page=1;\n");;
		sb.append("}\n");;
		sb.append("goPage(page);;\n");;
		sb.append("}\n");;
		sb.append("</script>\n");;
	}
		
	private void createNavigateBar(StringBuffer sb,PageInfo pInfo,String imagePath); {
		int currentPage = pInfo.getCurrentPage();;
		int pageTotal = pInfo.getPageTotal();;
		sb.append("<input type=\"hidden\" name=\"pageIndex\" value=\"" + currentPage + "\">");.append("\n");;
		sb.append("<input type=\"hidden\" name=\"pageTotal\" value=\"" + pageTotal + "\">");.append("\n");;
		sb.append("<table width=\"100%\" border=\"0\"><tbody><tr>");.append("\n");;
		sb.append("<td width=\"20%\" height=\"30\" align=\"center\">第" + currentPage + "页</td>");.append("\n");;
		sb.append("<td width=\"15%\" align=\"center\">共" + pageTotal + "页</td>");.append("\n");;
		sb.append("<td width=\"15%\" align=\"center\">共" +pInfo.getRecordTotal(); + "条</td>");.append("\n");;
		sb.append("<td width=\"50%\" valign=\"center\">");.append("\n");;		
		sb.append("<a href=\"javascript:goPage(1);;\" style=\"cursor:hand\">首页|  </a>");.append("\n");;
		int prevPage = 1;
		if (currentPage>=2); {
			prevPage = currentPage -1;
		}		
		sb.append("<a href=\"javascript:goPage(" + prevPage + ");;\" name=\"page\" style=\"cursor:hand\">前一页|  </a>");.append("\n");;
		int nextPage = pageTotal;
		if (currentPage<pageTotal-1); {
			nextPage = currentPage +1;
		}		
		sb.append("<a href=\"javascript:goPage(" + nextPage + ");;\" style=\"cursor:hand\">后一页|  </a>");.append("\n");;
		int lastPage = pageTotal;
		if (pageTotal<2); {
			lastPage = 1;
		}		
		sb.append("<a href=\"javascript:goPage(" + lastPage + ");;\" style=\"cursor:hand\">末页|  </a>");.append("\n");;
		sb.append("转到第<input name=\"pageNo\" type=\"text\" class=\"Input\" size=\"5\">页");.append("\n");;		
		sb.append("<a href=\"javascript:goToPage();;\" style=\"cursor:hand\">Go</a>");.append("\n");;
		sb.append("</td></tr></tbody></table>");.append("\n");;
	}
}

在action里使用的时候例子如下：

package demo.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import demo.pagetag.PageInfo;

public class ShowPageInfoAction extends Action {

	// --------------------------------------------------------- Instance Variables

	// --------------------------------------------------------- Methods

	/** 
	 * Method execute
	 * @param ActionMapping mapping
	 * @param ActionForm form
	 * @param HttpServletRequest request
	 * @param HttpServletResponse response
	 * @return ActionForward
	 * @throws Exception
	 */
	public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,
		HttpServletResponse response);
		throws Exception {

		System.out.println("ShowPageInfoAction .......");;

		//tag 里用到，必须
		PageInfo pInfo = new PageInfo();;
		pInfo.setPageSize(10);; //recordsNumber/Page
		pInfo.setRecordTotal(101);; //到service里拿
		setPageInfo(request, pInfo);;

		//查询，取到记录
		//List list=service.find(pInfo.getStartRecord();,pInfo.getEndRecord(););;
		//or
		//List list=service.find(pInfo);;
		//request.setAttribute("fileList",list);;

		return mapping.findForward("success");;
	}

	private void setPageInfo(HttpServletRequest request, PageInfo pInfo); {
				
		String pageIndex = request.getParameter("pageIndex");;//从页面取到的当前页				
		if (pageIndex == null || pageIndex.equals("");); {
			pInfo.setCurrentPage(1);;
		} else {
			pInfo.setCurrentPage(Integer.parseInt(pageIndex););;
		}
		String pageNo = request.getParameter("pageNo");;//跳转的目的页index				
		if (pageNo != null && !pageNo.equals("");); {
			pInfo.setCurrentPage(Integer.parseInt(pageNo););;
		}		
		request.setAttribute("pageName", pInfo);;//tag需要的PageInfo信息
	}
}