自定义标签代替Struts标签实现分页

package com.crmprj.util; import java.io.IOException; import javax.servlet.ServletRequest; import javax.servlet.http.HttpSession; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.TagSupport; import com.crmprj.entity.PageResult; import com.crmprj.struts.form.BaseForm; public class PageUtil extends TagSupport { private String formName = null; public String getFormName() { return formName; } public void setFormName(String formName) { this.formName = formName; } @Override public int doEndTag() throws JspException { ServletRequest request = this.pageContext.getRequest(); HttpSession session = this.pageContext.getSession(); JspWriter out = this.pageContext.getOut(); if(null != formName && !"".equals(formName)) { Object actionForm =request .getAttribute(formName); if(null == actionForm) { actionForm =session .getAttribute(formName); } BaseForm baseForm = (BaseForm)actionForm; PageResult pageResult = baseForm.getPageResult(); StringBuffer pageMsg = new StringBuffer(); pageMsg.append("<br><div style='width:90%;text-align: center; '>"); pageMsg.append("共"+pageResult.getRecordCount()+"条记录 每页显示<input style='text-align: center; ' name='pageResult.pageSize' value='"+pageResult.getPageSize()+"'size='3' />条 第<input style='text-align: center; ' name='pageResult.pageNo' value='"+pageResult.getPageNo()+"' size='3' />页 / 共"+pageResult.getPageCount()+"页 "); pageMsg.append("<a href='javascript:page_first();'>第一页</a>" + " <a href='javascript:page_pre();'>上一页</a> " + "<a href='javascript:page_next();'>下一页</a>" + " <a href='javascript:page_last();'>最后一页</a> " + "<input type='button' onClick='javascript:page_go();' title='搜索' value='GO' style='cursor:hand;'>"); pageMsg.append("</div><br>"); pageMsg.append("<div style='width:800px;text-align: left; '>"); pageMsg.append("<script>"); pageMsg.append("function page_go(){ " + "page_validate(); " + "document.forms[0].submit(); }"); pageMsg.append("function page_first(){ " + "document.forms[0].elements['pageResult.pageNo'].value = 1; " + "document.forms[0].submit();}"); pageMsg.append("function page_pre(){ " + "var pageNo = document.forms[0].elements['pageResult.pageNo'].value; " + "document.forms[0].elements['pageResult.pageNo'].value = parseInt(pageNo) - 1;" + "page_validate();" + "document.forms[0].submit();}"); pageMsg.append("function page_next(){ " + "var pageNo = document.forms[0].elements['pageResult.pageNo'].value; " + "document.forms[0].elements['pageResult.pageNo'].value = parseInt(pageNo) + 1; " + "page_validate();" + "document.forms[0].submit();" + "}"); pageMsg.append("function page_last(){ " + "document.forms[0].elements['pageResult.pageNo'].value = "+pageResult.getPageCount()+"; " + "document.forms[0].submit();" + "}"); pageMsg.append("function page_validate(){ " + "var pageTotal = "+pageResult.getPageCount()+";" + "var pageNo = document.forms[0].elements['pageResult.pageNo'].value; " + "if (pageNo<1)pageNo=1; " + "if (pageNo>pageTotal)pageNo=pageTotal; " + "document.forms[0].elements['pageResult.pageNo'].value = pageNo; " + "var recTotal = "+pageResult.getRecordCount()+"; " + "var pageSize = document.forms[0].elements['pageResult.pageSize'].value; " + "if (pageSize<1)pageSize=10; " + "if(pageSize>recTotal)pageSize=recTotal; " + "document.forms[0].elements['pageResult.pageSize'].value = pageSize; " +"}"); pageMsg.append("</script>"); pageMsg.append("</div>"); try { out.write(pageMsg.toString()); out.flush(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return EVAL_PAGE; } }