ResultSet rs=sql.executeQuery("delete from student_info where student_id= ");//
==>
ResultSet rs=sql.executeQuery("delete from student_info where student_id= " + jf1.getText());//你查查jdbc的连接方式。你的是odbc
==>
ResultSet rs=sql.executeQuery("delete from student_info where student_id= " + jf1.getText());//你查查jdbc的连接方式。你的是odbc
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