谁能提供一些JSP用户登陆的密码，想学习一下？

//login.jsp<%--login.jsp:--%><%@ page import="tom.jiafei.Login" %>
<%@ page session="true" %>
<%! //处理字符串的方法：
  public String codeString(String s)
    { String str=s;
       try{byte b[]=str.getBytes("ISO-8859-1");
           str=new String(b);
           return str;
         }
      catch(Exception e)
         { return str;
         }
    }
%>
<HTML><meta http-equiv="Content-Type" content="text/html;charset=gb2312">
<BODY bgcolor=pink ><Font size=2>
<%@ include file="head.html" %>
<Font size=2>
<P>输入用户名和密码：
<%String str=response.encodeURL("login.jsp");
%>
<FORM   action="<%=str%>" Method="post">
<BR>用户名称<Input type=text name="logname">
<BR>用户密码<Input type=password name="password">
<BR><Input type=submit name="g" value="提交">
</Form>
<jsp:useBean id="login" class="tom.jiafei.Login" scope="session" >
</jsp:useBean>
<% //提交信息后，验证信息是否正确：
   String  message="",
           logname="",
           password="";
    if(!(session.isNew()))
    {logname=request.getParameter("logname");
        if(logname==null)
           {logname="";
           }
     logname=codeString(logname);
     password=request.getParameter("password");
        if(password==null)
           {password="";
           }
     password=codeString(password);
   }
%>
<%
   if(!(logname.equals("")))
    {
   %>
     <jsp:setProperty  name= "login"  property="logname"  value="<%=logname%>" />
     <jsp:setProperty  name= "login"  property="password"  value="<%=password%>" />
   <%
     message=login.getMessage(); //获取返回的验证信息。
        if(message==null)
          {message="";
          }
   }
%>
<%  if(!(session.isNew()))
      { if(message.equals(logname+"你好！"))
          {session.setAttribute("name",logname);
           String meb=response.encodeURL("ex1.jsp");
           response.sendRedirect(meb);
          }
        else
          {out.print(message);
          }
      }
  %>
</Body>
</HTML>
//tom.jiafei.Login.java
//Login.java：
package tom.jiafei;
import java.sql.*;
public class Login
{   String logname,
           password,
           success="false",
           message=""; //用来返回登录是否成功的消息。
    Connection con;
    Statement sql;
    ResultSet rs;
    public Login()
    {  //加载桥接器：
       try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          }
       catch(ClassNotFoundException e){}
    }
   //设置属性值、获取属性值的方法：
   public void setLogname(String name)
    {  logname=name;
    }
   public String getLogname()
    {return logname;
    }
   public void setPassword(String pw)
    {  password=pw;
    }
    public String getPassword()
    {return password;
    }
   public String getSuccess()
    {return success;
    }
   //查询数据库的member表：
   public String getMessage()
    {try{
         con=DriverManager.getConnection("jdbc:odbc:info","admin","admin");
         sql=con.createStatement();
          String condition=
         "SELECT * FROM member WHERE logname = "+"'"+logname+"'";
          rs=sql.executeQuery(condition);
          int rowcount=0;
          String ps=null;
         while(rs.next())
           { rowcount++;
             logname=rs.getString("logname");
                     ps=rs.getString("password");
           }
         if((rowcount==1)&&(password.equals(ps)))
           { message=logname+"你好！";
             success="ok";
           }
        else
           {message="输入的用户名或密码不正确！";
            success="false";
           }
        con.close();
        return message;
       }
     catch(SQLException e)
       { message="输入的用户名或密码不正确！";
         success="false";
         return message;
       }
    }
}

hojay2001(小捷利)
你的东西是COPY的吧！

难道想用加密算法？
用户登陆还是写bean的比较好

自己写的，比较简单，不过完成了基本功能
//login.html
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head><body>
<form action="login1.jsp" method="post">
  <div align="center">
    <p>用户名
      <input  type="text" name="name" size="20">
    </p>
    <p>密码
      <input type="password" name="password" size="20">
    </p>
    <p>vip
      <input type="radio" name="radiobutton" value="radiobutton">
      普通
      <input type="radio" name="radiobutton" value="radiobutton">
    </p>
    <p>
      <input type="submit" name="Submit" value="确定">
      <input type="reset" name="Submit2" value="Reset">
    </p>
  </div>
</form></body>
</html>
//login.jsp处理login.html的请求
//login.jsp
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<jsp:useBean id="TestBean"  class="DbBean.DbBean" scope="page"/>
<% TestBean.OpenConn("jdbc:mysql://localhost:3306/project","root","yangbao");
   String name=request.getParameter("name");
   String pw1=request.getParameter("password");
   String sql="select * from student where id='"+name+"'and password='"+pw1+"'";
   ResultSet rs=TestBean.executeQuery(sql);
   rs.last();
  if (rs.getRow()>0){
     response.sendRedirect("main.jsp");
  }else{
      response.sendRedirect("err.jsp");
   }
   TestBean.closeStmt();
   TestBean.closeConn();
%>
</body>
</html>

TestBean 是用来连接和断开数据库的

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page language="java"%>
<%@ page import="date.*"%>
<%@ page session="true"%>
<%
String userid;
    userid=request.getParameter("userid");String password;
    password=request.getParameter("password");//String ip=request.getRemoteAddr();
String ip="121.111.121.212";%>
<%
    check_user c_u=new check_user();
c_u.setCheck_User(userid,password,ip);
boolean flag1=c_u.getUser_id_pass();
    boolean flag2=c_u.getIp();
    boolean flag3=c_u.getPassX();
    String user_name=c_u.getUser_name();

// ÅÐ¶Ï±êÖ¾È«ÌåÍ¨¹ý½øÈëÐÞ¸ÄÒ³Ãæ
if(flag1==true && flag2==true && flag3==true )
{
//httpSession httpsession=new httpSession();
session.setAttribute("username",user_name);
    session.setAttribute("userid",userid);
response.sendRedirect("main/index.jsp");
%>
<%
}
else
{
%>
<%
   if(flag1==false)
   {
%>
      <script language="javascript">
     // alert("account or password error!");
      alert(" ÕËºÅ»òÃÜÂë´íÎó! ");
<% session.setAttribute("userid","");       %>
      window.location="default.jsp";
  </script>
<%
   }

   if(flag2==false)
   {
%>
      <script language="javascript">
      //alert(" land ip error!");
      alert(" µÇÂ½ IP µØÖ·²»ÕýÈ·!");
<%       session.setAttribute("userid","");      %>
window.location="default.jsp";
  </script>
<%
    }

if(flag3==false)
    {
%>
   <SCRIPT language="javascript" >
      //alert(" you do not popedom ");
          alert(" ÄãÏÖÔÚ²»ÄÜµÇÂ½ÏµÍ³£¬ÇëÓë¹ÜÀíÔ±ÁªÏµ ");
<%     session.setAttribute("userid","");      %>
  window.location="default.jsp";
   </script>
<%
     }

}
%>
</body>
</html>//下面使用到的bean
package date;
import java.sql.*;
import date.*;
public class check_user
{    Conn conn=new Conn();

    String wuquan;
    String user_name;    ResultSet rs=null;    //  ¶¨ÒåÈ¨ÏÞ±êÖ¾ ****1.ÃÜÂëºÍÕËºÅ ****2.ÅÐ¶Ï IP  ****3.ÅÐ¶ÏÓÐÈ¨µÇÂ½
    boolean flag1=false;
    boolean flag2=false;
    boolean flag3=false;

    public check_user()
    {
    }

    public void setCheck_User(String userid,String password,String ip)
    {
     String sql=" select Reg_Code ,IP_IP ,Reg_PassX  , Reg_Name  from JHBJ,JHOA_IP where JHBJ_register.Reg_Code=JHOA_IP.Reg_Code and JHBJ_register.Reg_Code='"+userid+"' and  pwdcompare('"+password+"',Reg_PassWord,0)=1 AND JHOA_IP.Del_Flag=0";

        rs=conn.executeQuery(sql);

        if(rs!=null)
        {
           try
           {
               while(rs!=null&&rs.next())
               {
                   flag1=true;

               if(ip.equals(rs.getString("IP_IP")))
                   {
                   flag2=true;
                      System.out.println("nnsvoln anweosvn  2");
               }

               if(rs.getInt("Reg_PassX")==0)
               {
               flag3=true;
               System.out.println("nnsvoln anweosvn  3");
               }

               user_name=rs.getString("Reg_Name");                System.out.println("nnsvoln anweosvn  "+user_name);

               }
           }
           catch(Exception  e)
           {
              System.out.print(e.getMessage());
           }
       }
     }

     public boolean getUser_id_pass()
     {
         return flag1;
     }

     public boolean getIp()
     {
      return flag2;
     }

     public boolean getPassX()
     {
      return flag3;
     }

     public String getUser_name()
     {
      return user_name;
     }
}

调试易

谁能提供一些JSP用户登陆的密码，想学习一下？

解决方案 »