ssh2分页技术（以一个模块为例）

package com.startech.util; import java.io.IOException; import java.util.Enumeration; import javax.servlet.http.HttpServletRequest; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.TagSupport; /** * 分页标签的可执行程序 * * @author jn0906c * */ public class PageTag extends TagSupport { private static final long serialVersionUID = 1L; private int rscount;// 总记录数 private int currentpage;// 当前页 private String action;// 提交action private String className = BBSTEXT;// 样式 private int pagesize = Constants.PAGESIZE;// 每页记录 private int pagecount;// 总页数 /** **************样式常量******************** */ public static final String TEXT = "text"; public static final String IMAGE = "image"; public static final String BBSTEXT = "bbstext"; public static final String BBSIMAGE = "bbsimage"; public String getAction() { return action; } public void setAction(String action) { this.action = action; } public String getClassName() { return className; } public void setClassName(String className) { this.className = className; } public int getCurrentpage() { return currentpage; } public void setCurrentpage(int currentpage) { this.currentpage = currentpage; } public int getRscount() { return rscount; } public void setRscount(int rscount) { this.rscount = rscount; try { this.pagecount = ((this.rscount - 1) / this.pagesize) + 1; } catch (Exception ex) { this.pagecount = 0; } } @Override public int doStartTag() throws JspException { // TODO 自动生成方法存根 String pagetool = pagetool(className); JspWriter out = pageContext.getOut(); try { out.write(pagetool); } catch (IOException e) { // TODO 自动生成 catch 块 e.printStackTrace(); } return super.doStartTag(); } /** * 分页工具条 * * @param fileName * String * @return String */ public String pagetool(String flag) { StringBuffer str = new StringBuffer(); String url = this.getParamUrl(); int ProPage = this.currentpage - 1; int Nextpage = this.currentpage + 1; // 文字的分页 if (flag.equals(TEXT)) { str.append("<form method='post' name='pageform' action=''>"); str .append("<table width='100%' border='0' cellspacing='0' cellpadding='0' class='pgToolbar'>"); str.append("<tr>"); str.append("<td width='3%'>&nbsp;</td>"); str.append("<td height='26'>"); str.append("共有记录" + this.rscount + "条&nbsp;&nbsp;&nbsp;"); str.append("共" + this.pagecount + "页&nbsp;&nbsp;&nbsp;"); str.append("每页" + this.pagesize + "记录&nbsp;&nbsp;&nbsp;"); str.append("现在" + this.currentpage + "/" + this.pagecount + "页"); str.append("</td><td>"); if (this.currentpage > 1) { str.append("<a href='" + url + "&page.currentpage=1'>首页</a>"); str.append("&nbsp;&nbsp;&nbsp;"); str.append("<a href='" + url + "&page.currentpage=" + ProPage + "'>上一页</a>"); str.append("&nbsp;&nbsp;&nbsp;"); } else { str.append("首页"); str.append("&nbsp;&nbsp;&nbsp;"); str.append("上一页"); str.append("&nbsp;&nbsp;&nbsp;"); } if (this.currentpage < this.pagecount) { str.append("<a href='" + url + "&page.currentpage=" + Nextpage + "'>下一页</a>"); str.append("&nbsp;&nbsp;&nbsp;"); } else { str.append("下一页"); str.append("&nbsp;&nbsp;&nbsp;"); } if (this.pagecount > 1 && this.currentpage != this.pagecount) { str.append("<a href='" + url + "&page.currentpage=" + pagecount + "'>尾页</a>"); str.append("&nbsp;&nbsp;&nbsp;"); } else { str.append("尾页"); str.append("&nbsp;&nbsp;&nbsp;"); } str.append("转到"); str .append("<select name='page.currentpage' onchange='javascript:ChangePage(this.value);'>"); for (int j = 1; j <= pagecount; j++) { str.append("<option value='" + j + "'"); if (currentpage == j) { str.append("selected"); } str.append(">"); str.append("" + j + ""); str.append("</option>"); } str.append("</select>页"); str.append("</td><td width='3%'>&nbsp;</td></tr></table>"); str.append("<script language='javascript'>"); str.append("function ChangePage(testpage){"); str.append("document.pageform.action='" + url + "&page.currentpage='+testpage+'';"); str.append("window.location=document.pageform.action;"); str.append("}"); str.append("</script>"); str.append("</form>"); } else if (flag.equals(IMAGE)) { /** * 图片的分页 */ } else if (flag.equals(BBSTEXT)) { /** * 论坛形式的分页[直接以数字方式体现] */ str .append("<table width='100%' border='0' cellspacing='0' cellpadding='0' style='font-size: 13px;'>"); str.append("<tr>"); str.append("<td width='3%'>&nbsp;</td>"); str.append("<td height='26'>"); str.append("记录" + this.rscount + "条&nbsp;&nbsp;"); str.append("共" + this.pagecount + "页&nbsp;&nbsp;"); str.append("每页" + this.pagesize + "记录&nbsp;&nbsp;"); str.append("现在" + this.currentpage + "/" + this.pagecount + "页"); str.append("</td><td>"); // 设定是否有首页的链接 if (this.currentpage > 1) { str.append("<a href='" + url + "&page.currentpage=1'>首页</a>"); str.append("&nbsp;&nbsp;"); } // 设定是否有上一页的链接 if (this.currentpage > 1) { str.append("<a href='" + url + "&page.currentpage=" + ProPage + "'>上一页</a>"); str.append("&nbsp;&nbsp;&nbsp;"); } // 如果总页数只有10的话 if (this.pagecount <= 10) { for (int i = 1; i <= this.pagecount; i++) { if (this.currentpage == i) { str.append("<font color=red>[" + i + "]</font>&nbsp;&nbsp;"); } else { str.append("<a href='" + url + "&page.currentpage=" + i + "'>" + i + "</a>&nbsp;&nbsp;"); } } } else { // 说明总数有超过10页 // 制定特环的开始页和结束页 int endPage = this.currentpage + 4; if (endPage > this.pagecount) { endPage = this.pagecount; } int startPage = 0; if (this.pagecount >= 8 && this.currentpage >= 8) { startPage = this.currentpage - 5; } else { // 表示从第一页开始算 startPage = 1; } System.out.println(startPage); System.out.println(endPage); for (int i = startPage; i <= endPage; i++) { if (this.currentpage == i) { str.append("<font color=red>[" + i + "]</font>&nbsp;&nbsp;"); } else { str.append("<a href='" + url + "&page.currentpage=" + i + "'>" + i + "</a>&nbsp;&nbsp;"); } } } // 设定是否有下一页的链接 if (this.currentpage < this.pagecount) { str.append("<a href='" + url + "&page.currentpage=" + Nextpage + "'>下一页</a>"); str.append("&nbsp;&nbsp;"); } // 设定是否有尾页的链接 if (this.pagecount > 1 && this.currentpage != this.pagecount) { str.append("<a href='" + url + "&page.currentpage=" + pagecount + "'>尾页</a>"); str.append("&nbsp;&nbsp;"); } str.append("</td><td width='3%'>&nbsp;</td></tr></table>"); } else if (flag.equals(BBSIMAGE)) { /** * 论坛形式的分页[以图片的方式体现] */ // 设定分页显示的CSS str.append("<style>"); str .append("BODY {FONT-SIZE: 12px;FONT-FAMILY:宋体;WIDTH: 60%; PADDING-LEFT: 25px;}"); str .append("DIV.meneame {PADDING-RIGHT: 3px; PADDING-LEFT: 3px; FONT-SIZE: 80%; PADDING-BOTTOM: 3px; MARGIN: 3px; COLOR: #ff6500; PADDING-TOP: 3px; TEXT-ALIGN: center}"); str .append("DIV.meneame A {BORDER-RIGHT: #f