logintag.java

一个不错的bbs论坛系统．对初学者很有帮助

package com.yhbbs.comm.tag;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;

import com.yhbbs.bbs.biz.BbsPropBiz;
import com.yhbbs.user.online.Postion;
import com.yhbbs.utils.ReqUtils;

import org.apache.log4j.Logger;
/**
 * <p>Title: 论坛首页登录</p>
 * <p>Company: www.yyhweb.com</p>
 * <br><b>CopyRight: yyhweb[由由华网]</b>
 * @author stephen
 * @version YHBBS-2.0
 */
public class LoginTag extends TagSupport{
	
	private static final long serialVersionUID = 1L;
	
	private static Logger bbslog = Logger.getLogger(LoginTag.class);
	
	public int doStartTag() throws JspException	{
	    return 0;
	}
	public int doEndTag() throws JspException {
	    try {  
	    	 HttpServletRequest request = (HttpServletRequest)pageContext.getRequest();
	    	 StringBuffer sb = new StringBuffer();
	    	 String bbsName = ReqUtils.getStrAtt(request,"bbsname");
	    	 Postion.ChangPost(request,"用户登录");
	    	 sb.append("<table align=center cellSpacing=0 cellPadding=0 width=100%>");
		     sb.append("<tr height=25px class=tr_2><td class=tab1>&nbsp;&nbsp;");
				sb.append("<a href=index.htm>『");
				sb.append(bbsName);
				sb.append("』</a>");
				sb.append("&nbsp;&nbsp→&nbsp;&nbsp;用户登录");
			sb.append("</td>");
			sb.append("</tr>"); 
			sb.append("<tr><td height=3px>&nbsp;</td></tr>");
			
			sb.append("<tr><td align=center width=100%>");  
			sb.append("<table class=tab1 cellSpacing=0 cellPadding=0 width=100%>");
			sb.append("<tr><td class=tab_c colspan=2 height=25px align=center>");
			sb.append("<b><font color=#FFFFFF>用户登录</b></font>");
	    	sb.append("</td></tr>");
			    
			    sb.append("<form method=post action='LoginPost.htm' name=login onSubmit='return checklogin()'>");
			    sb.append("<tr height=30px><td class=td_tbg width=35% >");
			    sb.append("&nbsp;&nbsp;&nbsp;&nbsp;请输入您的用户名<br></td>");
			    sb.append("<td class=td_lt>");
			    sb.append("&nbsp;&nbsp;<input type=text name=username />&nbsp;&nbsp;&nbsp;<a href='Reg.htm'>没有注册</a>");
			    sb.append("</td></tr>");
			    
			    sb.append("<tr height=30px><td class=td_tbg>");
			    sb.append("&nbsp;&nbsp;&nbsp;&nbsp;请输入您的密码<br></td>");
			    sb.append("<td class=td_lt>");
			    sb.append("&nbsp;&nbsp;<input type=password name=password />&nbsp;&nbsp;&nbsp; 忘记密码");
			    sb.append("</td></tr>");
			    
			    if(BbsPropBiz.getParameter().getLoginCode()==1){
				    sb.append("<tr height=30px><td class=td_tbg>");
				    sb.append("&nbsp;&nbsp;&nbsp;&nbsp;请输入验证码<br></td>");
				    sb.append("<td class=td_lt>");
				    sb.append("&nbsp;&nbsp;<input type=text id='code' name=code size=4 maxlength=4 />&nbsp;&nbsp;<img border=0 src='codenum'>&nbsp;&nbsp;&nbsp;");
				    sb.append("</td></tr>");
			    }
			    
			    sb.append("<tr height=20px><td class=td_t colspan=2 >");
			    sb.append("&nbsp;&nbsp;&nbsp;&nbsp;登录选项");
			    sb.append("</td></tr>");
			    
			    sb.append("<tr height=30px><td class=td_tbg>");
			    sb.append("&nbsp;&nbsp;&nbsp;&nbsp;登录模式<br></td>");
			    sb.append("<td class=td_lt >");
			    sb.append("&nbsp;&nbsp;<input type=radio name=hd value=d checked />&nbsp;&nbsp;正常登录 &nbsp;&nbsp;&nbsp;&nbsp;将你的名字显示在线用户中<br>");
			    sb.append("&nbsp;&nbsp;<input type=radio name=hd value=h />&nbsp;&nbsp;隐身登录 &nbsp;&nbsp;&nbsp;&nbsp;在线用户中不显示你的名字");
			    sb.append("</td></tr>");
			    
			    sb.append("<tr height=30px><td class=td_tbg>");
			    sb.append("&nbsp;&nbsp;&nbsp;&nbsp;Cookie选项<br><br>");
			    sb.append("&nbsp;&nbsp;&nbsp;&nbsp;方便你下次登陆到论坛<br>");
			    sb.append("</td><td class=td_lt >");
			    sb.append("&nbsp;&nbsp;<input type=radio name=ck value=n checked />&nbsp;&nbsp;不保存<br>");
			    sb.append("&nbsp;&nbsp;<input type=radio name=ck value=d />&nbsp;&nbsp;保存一天<br>");
			    sb.append("&nbsp;&nbsp;<input type=radio name=ck value=w />&nbsp;&nbsp;保存一周<br>");
			    sb.append("&nbsp;&nbsp;<input type=radio name=ck value=m />&nbsp;&nbsp;保存一月<br>");
			    sb.append("</td></tr>");
			    
			    sb.append("<tr height=35px><td class=td_t colspan=2 align=center>");
			    sb.append("<input type=submit name=submit value=登录 />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type=reset value=返回  onClick='javascript:history.go(-1);' />");
			    sb.append("</td></tr>");
			    
			    sb.append("</form>");
			    sb.append("</table>");
			  sb.append("</td></tr>");
		    	
		     sb.append("</table><br>");
	    	 JspWriter out = pageContext.getOut();
	         out.println(sb);
	         sb = null;
	     }catch(Exception e){
	            bbslog.error("LoginTag tag's doEndTag error!");
	     }
	     return 6;
	 }
}