import ?java.util.ArrayList;
import ?java.util.HashMap;
import ?java.util.List;
import ?java.util.Map;

import ?javax.servlet.jsp.JspException;
import ?javax.servlet.jsp.JspWriter;
import ?javax.servlet.jsp.tagext.TagSupport;

/**?*/ /**
?*?自定義的分頁標簽
?*?
?*? @author ?馬萬林
?*?
? */
public ? class ?NumenTag? extends ?TagSupport? {

???? private ?String?url? = ? null ;

???? private ?Result?result;

???? private ?String?page? = ? null ;

???? private ?String[]?p;

???? private ?Map?kv? = ? new ?HashMap();

???? private ?List?key? = ? null ;

???? /**?*/ /**
?????*?分離參數
?????*? @param ?params
????? */
???? public ? void ?setParams(String?params)? {
????????key? = ? new ?ArrayList();
????????p? = ?params.split( " ; " );
???????? for ?( int ?i? = ? 0 ;?p.length > 1 && i? < ?p.length;?i ++ )? {
????????????kv.put(p[i].split( " : " )[ 0 ],?p[i].split( " : " )[ 1 ]);
????????????key.add(p[i].split( " : " )[ 0 ]);
????????}
????}

???? /**?*/ /**
?????*?分頁的結果
?????*? @param ?result
????? */
???? public ? void ?setResult(String?result)? {
???????? this .result? = ?(Result)?pageContext.getRequest().getAttribute( " result " );
???????? this .page? = ?(String)?pageContext.getRequest().getAttribute( " page " );
????}

???? public ? void ?setUrl(String?url)? {
???????? this .url? = ?url;
????}

???? public ? int ?doStartTag()? throws ?JspException? {
????????StringBuffer?sb? = ? null ;
???????? if ?(result? != ? null ? && ?result.getContent()? != ? null
???????????????? && ?result.getContent().size()? > ? 0 )? {
????????????sb? = ? new ?StringBuffer( " 分頁:? " );
???????????? if ?(result.getPage().getHasPrePage()) {
????????????????sb.append( " <a?href=' " ).append(url);
???????????????? if ?(url.indexOf( " ? " )? == ? - 1 )
????????????????????sb.append( " ?page=1 " );
???????????????? else
????????????????????sb.append( " &page=1 " );
????????????????linkParams(sb);
????????????????sb.append( " '> " ).append( " 首頁 " ).append( " </a> " ).append( " ?|? " );
????????????????sb.append( " <a?href=' " ).append(url);
???????????????? if ?(url.indexOf( " ? " )? == ? - 1 )
????????????????????sb.append( " ?page= " ).append(
????????????????????????????result.getPage().getPreviousPage());
???????????????? else
????????????????????sb.append( " &page= " ).append(
????????????????????????????result.getPage().getPreviousPage());
????????????????linkParams(sb);
????????????????sb.append( " '> " ).append( " 上頁 " ).append( " </a> " ).append( " ?|? " );
????????????}
???????????? if ?(result.getPage().getHasNextPage())? {
????????????????sb.append( " <a?href=' " ).append(url);
???????????????? if ?(url.indexOf( " ? " )? == ? - 1 )
????????????????????sb.append( " ?page= " ).append(result.getPage().getNextPage());
???????????????? else
????????????????????sb.append( " &page= " ).append(result.getPage().getNextPage());
????????????????linkParams(sb);
????????????????sb.append( " '> " ).append( " 下頁 " ).append( " </a> " ).append( " ?|? " );
????????????????sb.append( " <a?href=' " ).append(url);
???????????????? if ?(url.indexOf( " ? " )? == ? - 1 )
????????????????????sb.append( " ?page= " ).append(result.getPage().getTotalPage());
???????????????? else
????????????????????sb.append( " &page= " ).append(result.getPage().getTotalPage());
????????????????linkParams(sb);
????????????????sb.append( " '> " ).append( " 尾頁 " ).append( " </a> " );
????????????}
????????????sb
????????????????????.append( " ?跳轉到:<select?name='goToPage'?onchange='javascript:goPage(this.value)'> " );
???????????? int ?s? = ?result.getPage().getTotalCount();
???????????? for ?( int ?i? = ? 1 ;?i? <= ?s;?i ++ )? {
????????????????sb.append( " <option?value= " ).append(i);
???????????????? if ?(Integer.parseInt(page)? == ?i)
????????????????????sb.append( " ?selected " );
????????????????sb.append( " >第 " ).append(i).append( " 頁</option> " );
????????????}
????????????sb.append( " </select> " );
????????????sb.append( " <script?language=javascript> " );
????????????sb.append( " function?goPage(page){ " ).append( " window.location=' " )
????????????????????.append(url);
???????????? if ?(url.indexOf( " ? " )? == ? - 1 )
????????????????sb.append( " ?page='+ " ).append( " page " );
???????????? else
????????????????sb.append( " &page='+ " ).append( " page " );
????????????sb.append( " +' " );
????????????linkParams(sb);
????????????sb.append( " '; " );
????????????sb.append( " } " );
????????????sb.append( " </script> " );
????????}
???????? try ? {
???????????? if ?(sb? != ? null )? {
????????????????JspWriter?out? = ?pageContext.getOut();
????????????????out.print(sb);
????????????}
????????} ? catch ?(Exception?e)? {
???????????? throw ? new ?JspException(e);
????????}
???????? return ?EVAL_PAGE;
????}
????
???? /**?*/ /**
?????*?鏈接參數處理
?????*? @param ?sb
????? */
???? private ? void ?linkParams(StringBuffer?sb)? {
???????? for ?( int ?i? = ? 0 ;?i? < ?key.size();?i ++ )? {
????????????sb.append( " & " ).append(key.get(i)).append( " = " ).append(
????????????????????kv.get(key.get(i)));
????????}
????}

}

<? xml??version="1.0"??encoding="utf-8"?? ?>
? <! DOCTYPE?taglib?PUBLIC?"-//Sun?Microsystems,?Inc.//DTD?JSP?Tag?Library?1.2//EN"?"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd" >
< taglib >
???? < tlib-version > 1.0 </ tlib-version >
???? < jsp-version > 1.2 </ jsp-version >
???? < short-name > numen </ short-name