org.apache.jasper.JasperException: Exception in JSP: /del.jsp:43

40:     else
41:     {
42:     String delsql="del from student where name='"+name+"'";
43:     stmt.executeUpdate(delsql); 
44:     stmt.close();
45:     con.close();
46:     }

请问哪位大哥谁知道我上面的代码有什么问题???........