jsp java 登陆界面代码_jsp登陆界面源代码

展开全部

1、login.jsp文件

pageEncoding=”GB18030″%>

登录afe59b9ee7ad06436页面

2、judge.jsp文件

pageEncoding=”GB18030″%>

身份验证

request.setCharacterEncoding(“GB18030”);

String name = request.getParameter(“userName”);

String password = request.getParameter(“password”);

if(name.equals(“abc”)&& password.equals(“123”)) {

3、afterLogin.jsp文件

%>

}

else {

%>

}

%>

pageEncoding=”GB18030″%>

登录成功

request.setCharacterEncoding(“GB18030”);

String name = request.getParameter(“userName”);

out.println(“欢迎你:” + name);

%>

扩展资料：

java web登录界面源代码：

1、Data_uil.java文件

import java.sql.*;

public class Data_uil

{

public  Connection getConnection()

{

try{

Class.forName(“com.microsoft.sqlserver.jdbc.SQLServerDriver”);

}catch(ClassNotFoundException e)

{

e.printStackTrace();

}

String user=”*”;

String password=”*”;

String url=”jdbc:sqlserver://127.0.0.1:1433;DatabaseName=*”;

Connection con=null;

try{

con=DriverManager.getConnection(url,user,password);

}catch(SQLException e)

{

e.printStackTrace();

}

return con;

}

public  String selectPassword(String username)

{

Connection connection=getConnection();

String sql=”select *from login where username=?”;

PreparedStatement preparedStatement=null;

ResultSet result=null;

String password=null;

try{

preparedStatement=connection.prepareStatement(sql);

preparedStatement.setString(1,username);

result=preparedStatement.executeQuery();//可执行的     查询

if(result.next())

password=result.getString(“password”);

}catch(SQLException e){

e.printStackTrace();

}finally

{

close(preparedStatement);

close(result);

close(connection);

}

System.out.println(“找到的数据库密码为：”+password);

return password;

}

public  void close (Connection con)

{

try{

if(con!=null)

{

con.close();

}

}catch(SQLException e)

{

e.printStackTrace();

}

}

public  void close (PreparedStatement preparedStatement)

{

try{

if(preparedStatement!=null)

{

preparedStatement.close();

}

}catch(SQLException e)

{

e.printStackTrace();

}

}

public  void close(ResultSet resultSet)

{

try{

if(resultSet!=null)

{

resultSet.close();

}

}catch(SQLException e)

{

e.printStackTrace();

}

}

}

2、login_check.jsp:文件

pageEncoding=”utf-8″%>

验证用户密码

String username=(String)request.getParameter(“username”);

String password=(String)request.getParameter(“password”);

if(username==null||””.equals(username))

{

out.print(“”);

response.setHeader(“refresh”, “0;url=user_login.jsp”);

}

else

{

System.out.println(“输入的用户名:”+username);

String passwordInDataBase=util.selectPassword(username);

System.out.println(“密码：”+passwordInDataBase);

if(passwordInDataBase==null||””.equals(passwordInDataBase))

{

out.print(“”);

response.setHeader(“refresh”, “0;url=user_login.jsp”);

}

else if(passwordInDataBase.equals(password))

{

out.print(“”);

response.setHeader(“refresh”, “0;url=loginSucces.jsp”);

}

else

{

out.print(“”);

response.setHeader(“refresh”, “0;url=user_login.jsp”);

}

}

%>

3、loginSucces.jsp文件

pageEncoding=”utf-8″%>

Insert title here

登录成功

4、user_login.jsp文件

pageEncoding=”utf-8″%>

登录界面