写出如下程序的输出结果。 public class Test4_4 { private static String driver="com.mysql.jdbc.Driver"; private static String url="jdbc:mysql://localhost/StudentScore?"+ "useUnicode=true&characterEncoding=gb2312"; private static String user="root"; private static String password=""; public static void main(String[] args) { Connection conn=null; PreparedStatement ps=null; ResultSet rs=null; String selectSql="SELECT * FROM Student WHERE dept=?"; String insertSql="INSERT INTO Student(sNo,sName,,age,dept) VALUES(?,?,?,?,?);"; String updateSql="UPDATE Student SET dept='金融' WHERE sNo=?"; String deleteSql="DELETE FROM Student WHERE sNo=?"; try { Class.forName(driver); conn=DriverManager.getConnection(url,user,password); ps=conn.prepareStatement(selectSql); ps.setString(1, "计算机"); rs=ps.executeQuery(); while(rs.next()) { String no=rs.getString("sNo"); String name=rs.getString("sName"); String =rs.getString(""); int age=rs.getInt("age"); String dept=rs.getString("dept"); System.out.println(no+" "+name+" "++" "+age+" "+dept); } ps=conn.prepareStatement(insertSql); ps.setString(1, "201201009"); ps.setString(2, ""); ps.setString(3, "男"); ps.setInt(4, 18); ps.setString(5, "外语"); int count=ps.executeUpdate(); ps=conn.prepareStatement(updateSql); ps.setString(1, "201201009"); count=ps.executeUpdate(); ps=conn.prepareStatement(deleteSql); ps.setString(1, "201201009"); count=ps.executeUpdate(); }catch (Exception e) { e.printStackTrace(); }finally { try { if(rs !=null) rs.close(); if(ps !=null) ps.close(); if(conn !=null) conn.close(); }catch (Exception e) { e.printStackTrace(); } } } }