denglu.jsp

JSP图书管理系统 包括会员管理 图书管理 借阅管理 等等 是非常好的图书管理软件

<table width="180" height="18" border="0" cellpadding="0" cellspacing="0">
<form method="POST" action="login.jsp">
 <%
//是否登陆
if((String)session.getValue("user_name")!=null) 
               {
		String name=(String)session.getAttribute("user_name");
		sql="select * from member where user_name='"+name+"'";
		rs=stmt.executeQuery(sql);
		if(rs.next()){
		%>
		<tr align="justify" valign="top"> 
                                    <td width="120" height="20">用户名:</td>
                                    <td width="51" height="20"><%=rs.getString("user_name")%></td>
    </tr>
                                  <tr> 
                                    <td height="25">地址:</td>
                                    <td height="25"></td>
                                  </tr>
                                								  <tr> 
								  <td height="25" colspan="2"><div align="center"><a href="index.jsp?loginout=true">退出登录</a></div>
								  </td>
  </tr> 
  <%
		}

 }else
 //没有登陆
 {
 %>

                     
                        <tr> 
                          <td> <div align="center">客户：</div></td>
                          <td> <div align="center"> 
                              <input name="user_name" type="text" class=input id="user_name" style="FONT-SIZE: 12px; WIDTH: 110px" size="10" maxlength="18">
                            </div></td>
    </tr>
                              <tr> 
                                <td> <div align="center">密码：</div></td>
                                <td> <div align="center"> 
                                    <input style="FONT-SIZE: 12px; WIDTH: 110px" type="password" name="user_pass" size="10" class=input maxlength="18">
                                  </div></td>
                              </tr>
							  <tr>
							  <td colspan="2" nowrap><div align="center">
                                <input type="submit" name="Submit2" value="登录">							 
                                  　 
                                  <input type="button" name="Submit" value="用户注册" onClick="javascript:window.location.href='reguser.jsp'">
                                </div></td>
    </tr>
        
		 
<%
}//判断登陆结束

String loginout=request.getParameter("loginout");//退出登陆
	if(loginout!=null)
	{
		if(loginout.compareTo("true")==0)
		{
			session.removeAttribute("user_name");
			response.sendRedirect("index.jsp");
		}
	}
	%>
  </form>  
  
              </table>
<p>&nbsp;</p>