web-jpadata

package com.li72.tag; import java.io.IOException; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.Tag; import javax.servlet.jsp.tagext.TagSupport; import org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager; /** * @author li72 * 2013-2-12下午05:27:15 */ public class PageTag extends TagSupport { private static final long serialVersionUID = 1L; private Object pageSize;//每页显示的记录数 private Object currentIndex;//当前页 private Object maxPage;//总页数 private Object hrefActionName;//要链接到的action private Object maxCount;//总记录数 private Object list;//页数编号 private Object parmName;//参数名称 可能是查询条件 public int doStartTag() throws JspException { JspWriter out = pageContext.getOut(); StringBuffer sbOut = new StringBuffer(); sbOut.append("<div class='container'><ul class='list'><li>每页显示 "+getPageSize().toString()+" 条数据</li><li>当前页面 "+getCurrentIndex().toString()+"/"+getMaxPage().toString()+" </li>"); if(getMaxPage().toString().equals("0")||getMaxPage().toString().equals("1")){//总共只有一页 sbOut.append("<li>首页</li><li>上一页</li><li>下一页</li><li>尾页</li>"); }else if(getCurrentIndex().toString().equals("1")){//当前页为第一页 sbOut.append("<li>首页</li><li>上一页</li><li><a href='"+getHrefActionName().toString()+"?page.pageNum="+(Integer.parseInt(getCurrentIndex().toString())+1)+"'>下一页</a></li><li><a href='"+getHrefActionName().toString()+"?page.pageNum="+getMaxPage().toString()+"'>尾页</a></li>"); }else if(getCurrentIndex().toString().equals(getMaxPage().toString())){//当关页为最后一页 sbOut.append("<li><a href='"+getHrefActionName().toString()+"?page.pageNum=1'>首页</a></li><li><a href='"+getHrefActionName().toString()+"?page.pageNum="+(Integer.parseInt(getCurrentIndex().toString())-1)+"'>上一页</a></li><li>下一页</li><li>尾页</li>"); }else{//显示所有链接（首页，上一页，下一页，尾页） sbOut.append("<li><a href='"+getHrefActionName().toString()+"?page.pageNum=1'>首页</a></li><li><a href='"+getHrefActionName().toString()+"?page.pageNum="+(Integer.parseInt(getCurrentIndex().toString())-1)+"'>上一页</a></li><li><a href='"+getHrefActionName().toString()+"?page.pageNum="+(Integer.parseInt(getCurrentIndex().toString())+1)+"'>下一页</a></li><li><a href='"+getHrefActionName().toString()+"?page.pageNum="+getMaxPage().toString()+"'>尾页</a></li>"); } sbOut.append("<li>共 "+getMaxCount()+" 条记录</li><li class='seach'>转到 <select name='pagelist' id='pagelist' onchange='turnPage()'>"); String[] strList = list.toString().split(","); for(int i=0;i<strList.length;i++){ if(strList[i].equals(getCurrentIndex().toString())){ sbOut.append("<option style='color:#666666' selected='selected' value='"+strList[i]+"'>"+strList[i]+"</option>"); }else{ sbOut.append("<option style='color:#666666' value='"+strList[i]+"'>"+strList[i]+"</option>"); } } sbOut.append("</select></li></div>"); //System.out.println(sbOut.toString()); try { //out.print("pageSize "+getPageSize()+" currentIndex "+getCurrentIndex()); //out.print("<li><a href='#'>首页</a></li><li><a href='#'>上一页</a></li><li><a href='#'>下一页</a></li><li><a href='#'>尾页</a></li><li>共 200 条记录</li><li class='seach'>转到<select name='pagelist'><option style='color:#666666'>1</option><option style='color:#666666'>2</option></select></li></div>"); out.print(sbOut.toString()); }catch(IOException e) { e.printStackTrace(); } // doStartTag() 方法返回 SKIP_BODY 。当然其原因是我们的简单日期标记没有正文。 return Tag.SKIP_BODY; } //ExpressionEvaluatorManager.evaluate( "pageSize", pageSize.toString(), Object.class, this, pageContext); public Object getPageSize() { return pageSize; } public void setPageSize(Object pageSize) { try { this.pageSize = (Object) ExpressionEvaluatorManager.evaluate("pageSize", pageSize.toString(), Object.class, this, pageContext); } catch (JspException e) { // TODO Auto-generated catch block e.printStackTrace(); }; } public Object getCurrentIndex() { return currentIndex; } public void setCurrentIndex(Object currentIndex) { try { this.currentIndex = (Object) ExpressionEvaluatorManager.evaluate("currentIndex", currentIndex.toString(), Object.class, this, pageContext); } catch (JspException e) { // TODO Auto-generated catch block e.printStackTrace(); }; } public Object getMaxPage() { return maxPage; } public void setMaxPage(Object maxPage) { try { this.maxPage = ExpressionEvaluatorManager.evaluate("maxPage", maxPage.toString(), Object.class, this, pageContext); } catch (JspException e) { // TODO Auto-generated catch block e.printStackTrace(); }; } public Object getHrefActionName() { return hrefActionName; } public void setHrefActionName(Object hrefActionName) { try { this.hrefActionName = (Object) ExpressionEvaluatorManager.evaluate("hrefActionName", hrefActionName.toString(), Object.class, this, pageContext); } catch (JspException e) { // TODO Auto-generated catch block e.printStackTrace(); }; } public Object getMaxCount() { return maxCount; } public void setMaxCount(Object maxCount) { try { this.maxCount = (Object) ExpressionEvaluatorManager.evaluate("maxCount", maxCount.toString(), Object.class, this, pageContext); } catch (JspException e) { // TODO Auto-generated catch block e.printStackTrace(); }; } public Object getList() { return list; } public void setList(Object list) { try { this.list = (Object) ExpressionEvaluatorManager.evaluate("list", list.toString(), Object.class, this, pageContext); } catch (JspException e) { // TODO Auto-generated catch block e.printStackTrace(); }; } public Object getParmName() { if(parmName==null){ parmName=""; } return parmName; } public void setParmName(Object parmName) { if(null==parmName){ parmName=""; } try { this.parmName = (Object) ExpressionEvaluatorManager.evaluate("parmName", parmName.toString(), Object.class, this, pageContext); } catch (JspException e) { // TODO Auto-generated catch block e.printStackTrace(); }; } }