正版的07作战靴硬吗:谁能解决下JSP这段代码里面得错误？

import java.sql.*;
public class voteconn
{
Connection con;
ResultSet rs;
public voteConn()
{ try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}
catch(ClassNotFoundException e){
System.err.println(e.getMessage());
}
}
public ResultSet executeQuery(Sring sql)
{ try{con=DriverManager.getConnection("jdbc:odbc:research","","");
Statement stm=con.createStatement();
rs=stm.executeQuery(sql);
}
catch(SQLException ex){
System.err.println(ex.getMessage());
}
return rs;
}
public int executeUpdate(String sql)
{ int result=0;
try{con=DriverManager.getConnection("jdbc:odbc:research","","");
Statement stmt=con.createStatement();
result=stmt.executeUpdate(sql);
}
catch(SQLException ex){
System.err.println(ex.getMessage());
}
return result;
}
}

在这个地方：public voteConn() 编译得时候会出错误，但是我真得看不出来哪错了，拜托帮忙一下