servlet 编译出错 菜鸟求大家帮助哇
D:\myservlet\control\HandleLogin.java:2: package mybean.data does notimport mybean.data.*;
^
D:\myservlet\control\HandleLogin.java:24: cannot find symbol
symbol : class Login
location: class myservlet.control.HandleLogin
Login loginBean=null;
^
D:\myservlet\control\HandleLogin.java:27: cannot find symbol
symbol : class Login
location: class myservlet.control.HandleLogin
try{ loginBean=(Login)session.getAttribute("login");
^
D:\myservlet\control\HandleLogin.java:29: cannot find symbol
symbol : class Login
location: class myservlet.control.HandleLogin
{ loginBean=new Login();
^
D:\myservlet\control\HandleLogin.java:34: cannot find symbol
symbol : class Login
location: class myservlet.control.HandleLogin
{ loginBean=new Login();
^
D:\myservlet\control\HandleLogin.java:90: cannot find symbol
symbol : variable response
location: class myservlet.control.HandleLogin
{ doPost(request,response);
^
6 errors
—————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————以下为源文件
package myservlet.control;
import mybean.data.*;
import java.sql.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HandleLogin extends HttpServlet
{ public void init(ServletConfig config) throws ServletException
{ super.init(config);
try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
}
catch(Exception e){}
}
public String handleString(String s)
{ try{ byte bb[]=s.getBytes("iso-8859-1");
s=new String(bb);
}
catch(Exception ee){}
return s;
}
public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
{ Connection con;
PreparedStatement sql;
Login loginBean=null;
String backNews="";
HttpSession session=request.getSession(true);
try{ loginBean=(Login)session.getAttribute("login");
if(loginBean==null)
{ loginBean=new Login();
session.setAttribute("login",loginBean);
}
}
catch(Exception ee)
{ loginBean=new Login();
session.setAttribute("login",loginBean);
}
String logname=request.getParameter("logname").trim(),
password=request.getParameter("password").trim();
boolean ok=loginBean.getSuccess();
logname= handleString(logname);
password=handleString(password);
if(ok==true&&logname.equals(loginBean.getLogname()))
{ backNews=logname+"已经登录了";
loginBean.setBackNews(backNews);
}
else
{ String uri="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=LJT";
boolean boo=(logname.length()>0)&&(password.length()>0);
try{ con=DriverManager.getConnection(uri,",",",");
String condition="select * from admin where logname =? and password =?";
sql=con.prepareStatement(condition);
if(boo)
{ sql.setString(1,logname);
sql.setString(2,password);
ResultSet rs=sql.executeQuery();
boolean m=rs.next();
if(m==true)
{ backNews="登录成功";
loginBean.setBackNews(backNews);
loginBean.setSuccess(true);
loginBean.setLogname(logname);
}
else
{ backNews="您输入的用户名不匹配，或密码错误";
loginBean.setBackNews(backNews);
loginBean.setSuccess(false);
loginBean.setLogname(logname);
loginBean.setPassword(password);
}
}
else
{ backNews="您输入的用户名不匹配，或密码错误";
loginBean.setBackNews(backNews);
loginBean.setSuccess(false);
loginBean.setLogname(logname);
loginBean.setPassword(password);
}
con.close();
}
catch(SQLException exp)
{ backNews=""+exp;
loginBean.setBackNews(backNews);
loginBean.setBean.setSuccess(false);
}
}
RequestDispatcher dispatcher=request.getRequestDispatcher("showLoginMess.jsp");
dispatcher.forward(request, response);
}
public void deGet(HttpServletRequest request,HttpServletResponse reponse) throws ServletException,IOException
{ doPost(request,response);
}
} --------------------编程问答-------------------- 求助哇 有没有人看见啊... --------------------编程问答-------------------- 源代码中public class HandleLogin extends HttpServlet 中的class首字母应该大写 Class
而且源代码中没有导入Login这个类
你想做登录检查,应该了解里面的机制,不是复制代码额.
Session验证的思路是对的,可是没有真正理解 --------------------编程问答--------------------
请问怎么导入类额...我这个源代码是按书上例子打得 --------------------编程问答-------------------- 导入类用：import 包名.类名;
可以导入自己同一个项目但在不同包下的类，也可以通过加jar包，导入jar包中的类
--------------------编程问答-------------------- 这个不是一个完整的例子吧,只是完成了验证是否登录的功能.
1. 导入类: 在代码的最上端 import web.Login; 类似这样的代码
2. 你看看书上是不是有Login这个类,也敲进你的程序.总之代码敲全了,应该没有问题 --------------------编程问答-------------------- D:\myservlet\control\HandleLogin.java:2: package mybean.data does not
import mybean.data.*;
^
这个是什么意思啊
补充：Java , Web 开发
