经调过的Struts+Hibernate分页演示程序

package com.accp.pager; import javax.servlet.jsp.tagext.*; import javax.servlet.jsp.*; import javax.servlet.*; import javax.servlet.http.*; import java.util.*; import java.net.URLEncoder; import java.io.IOException; /** * 显示导航条,可利用此改变每页的记录数,上下翻页和跳页 * 使用方法:<page:navigator type='BUTTON'/> * @author Starboy * @version 2.0 */ public class NavigatorTag extends TagSupport { /**导航条的类型(BUTTON/TEXT)(按钮型/文字链接型)*/ private String type = "BUTTON"; //选择导航条类型默认"BUTTON"(BUTTON/TEXT) public void setType(String newType) { type = newType; } public int doStartTag() throws JspException { try { String bar = getNavigatorBar(type); pageContext.getOut().write(bar); return SKIP_BODY; } catch (IOException ioe) { throw new JspException(ioe.getMessage()); } } public int doEndTag() throws JspException { return EVAL_PAGE; } /** * 根据指定类型获得导航条预先设计的导航条 * @param type 导航条类型(BUTTON/TEXT) * @return 返回导航条的HTML代码,若指定类型不存在,返回"" */ private String getNavigatorBar(String type) { String bar = ""; String pageNo = ((Integer) pageContext.getAttribute("pageNo")).toString(); String pages = ((Integer) pageContext.getAttribute("pages")).toString(); String total = ((Integer) pageContext.getAttribute("total")).toString(); String pageSize = ((Integer) pageContext.getAttribute("pageSize")).toString(); String nextDisabled = ""; String prevDisabled = ""; if (Integer.parseInt(pageNo) >= Integer.parseInt(pages)) nextDisabled = "disabled"; if (Integer.parseInt(pageNo) <= 1) prevDisabled = "disabled"; //---------------------按钮型的导航条-----------------------// if (type.equalsIgnoreCase("BUTTON")) { String pageSizeInput = "<input type='text' size='2' value='" + pageSize + "' " + "onChange=\"javascript:this.form.choice.value='current';" + "this.form.pageSize.value=this.value;this.form.submit();\">"; String firstButton = "<input type='button' value='首 页' " + prevDisabled + " " + "onClick=\"javascript:this.form.choice.value='first';this.form.submit();\">"; String prevButton = "<input type='button' value='上一页' " + prevDisabled + " " + "onClick=\"javascript:this.form.choice.value='prev';this.form.submit();\">"; String nextButton = "<input type='button' value='下一页' " + nextDisabled + " " + "onClick=\"javascript:this.form.choice.value='next';this.form.submit();\">"; String lastButton = "<input type='button' value='最后一页' " + nextDisabled + " " + "onClick=\"javascript:this.form.choice.value='last';this.form.submit();\">"; String pageNoInput = "<input type='text' size='3' value='" + pageNo + "' " + "onChange=\"javascript:this.form.pageNo.value=this.value\">"; bar = "每页pageSize条记录 | \n" + "共pages页/total条记录 | \n" + "first \n prev \n next \n last \n | 第pageNo页\n" + " <input type='submit' value='go' onClick=\"javascript:this.form.choice.value='current';\">\n"; bar = StringUtil.replace(bar, "pageSize", pageSizeInput); bar = StringUtil.replace(bar, "pages", pages); bar = StringUtil.replace(bar, "total", total); bar = StringUtil.replace(bar, "first", firstButton); bar = StringUtil.replace(bar, "prev", prevButton); bar = StringUtil.replace(bar, "next", nextButton); bar = StringUtil.replace(bar, "last", lastButton); bar = StringUtil.replace(bar, "pageNo", pageNoInput); } /////end of if(button) //-------------------------文字型----------------------------// if (type.equalsIgnoreCase("TEXT")) { String pageSizeInput = "<input type='text' size='2' value='" + pageSize + "' " + "onChange=\"document.pager.choice.value='current';" + "this.form.pageSize.value=this.value;this.form.submit();\">"; String firstText = "首 页"; String prevText = "上一页"; String nextText = "下一页"; String lastText = "最后一页"; if (prevDisabled.equalsIgnoreCase("")) { firstText = "<a href='first' " + "onClick=\"javascript:document.pager.choice.value='first';document.pager.submit();return false;\">" + "首 页" + "</a>"; prevText = "<a href='prev' " + "onClick=\"javascript:document.pager.choice.value='prev';document.pager.submit();return false;\">" + "上一页" + "</a>"; } if (nextDisabled.equalsIgnoreCase("")) { nextText = "<a href='next' " + "onClick=\"javascript:document.pager.choice.value='next';document.pager.submit();return false;\">" + "下一页" + "</a>"; lastText = "<a href='last' " + "onClick=\"javascript:document.pager.choice.value='last';document.pager.submit();return false;\">" + "最后一页" + "</a>"; } String pageNoInput = "<input type='text' size='3' size='2' value='" + pageNo + "' " + "onChange=\"javascript:this.form.pageNo.value=this.value\">"; bar = "每页pageSize条记录 | \n" + "共pages页/total条记录 | \n" + "first \n prev \n next \n last \n | 第pageNo页\n" + " <input type='submit' value='go' onClick=\"javascript:this.form.choice.value='current';\">\n"; bar = StringUtil.replace(bar, "pageSize", pageSizeInput); bar = StringUtil.replace(bar, "pages", pages); bar = StringUtil.replace(bar, "total", total); bar = StringUtil.replace(bar, "first", firstText); bar = StringUtil.replace(bar, "prev", prevText); bar = StringUtil.replace(bar, "next", nextText); bar = StringUtil.replace(bar, "last", lastText); bar = StringUtil.replace(bar, "pageNo", pageNoInput); } /////end of if(text) //---------------------按钮型的导航条-----------------------// if (type.equalsIgnoreCase("SIMPLEBUTTON")) { String pageSizeInput = "<input class='navbar' type='text' size='1' value='" + pageSize + "' " + "onChange=\"javascript:this.form.choice.value='current';" + "this.form.pageSize.value=this.value;this.form.submit();\">"; String prevButton = "<input class='navbar' type='button' value='上一页' " + prevDisabled + " " + "onClick=\"javascript:this.form.choice.value='prev';this.form.submit();\">"; String nextButton = "<input class='navbar' type='button' value='下一页' " + nextDisabled + " "