📄 login.jsp~94~

📁 system1为用户注册模块 system2为在线聊天系统 system3为在线投票系统 system4为在线考试系统 system5为新闻发布模块

💻 JSP~94~

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<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<%@ page import="javax.swing.*" %>
<%
  String Username=request.getParameter("Username");
  String Password=request.getParameter("Password");
  String input= request.getParameter("rand");
  if (Username!=null && Password!=null)
  {
  //把用户名和密码保存在session中
  session.setAttribute("user_name",Username);
  session.setAttribute("pass_word",Password);
  session.setAttribute("input",input);
  //验证用户输入的验证码是否正确
 if (input.equals(session.getAttribute("rand")))
 {
   //如果正确就跳转到check.jsp验证用户名密码
    response.sendRedirect("check.jsp");
 }
 else
 {
   //验证码不正确
   out.print("验证码错误");
   //JOptionPane.showMessageDialog(null,"请选择文件！","提示",JOptionPane.ERROR_MESSAGE);
 }
  }
%>


<script type="text/javascript">
function check()
{
  if (form.Username.value=="")
  {
    alert("请输入用户名!!!");
    form.Username.focus();
    return false;
  }
  if (form.Password.value=="")
  {
    alert("请输入密码!!!");
    form.Username.focus();
    return false;
  }
}
</SCRIPT>

<html>
<HEAD>
  <title>用户登陆</title>
</HEAD>
<BODY>
<form name="form" onsubmit="return check()" action="login.jsp" method="post">
<TABLE width=265 align=center border=1>
  <TBODY>
    <TR align=center valign="middle">
      <TD colspan="2">
        <STRONG>登录</STRONG>
      </TD>
    </TR>

    <tr>
      <td height="54" align="center">用户名：</td>
      <td width="181" height=54>
        <input id=Username name=Username>
      </TD>
   </TR>

    <tr>
      <td height="54" align="center">密码：</td>
      <td width="181" height=54>
        <input id=Password type=Password name=Password>
      </TD>
    </TR>

    <tr>
      <td align="center">认证码：</td>
      <td>
        <img border=1 src="image.jsp" alt="3">
      </td>
    </tr>

    <tr>
      <td height="54" align="center">认证码：</td>
      <td width="181" height=54>
        <input type=text name=rand maxlength=4 value="">
      </td>
    </tr>
    <TR>

      <TD colspan="2" align=center>
        <INPUT type=submit value=登陆>
        <INPUT type=reset value=重置>
      </TD>
    </TR>
  </TBODY>
</TABLE>
</FORM>
</BODY>
</HTML>

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