deletecourseaction.java~2~

来自「java(Swing) access做的成绩管理系统」· JAVA~2~ 代码 · 共 48 行

package edu.xscj.action;

import java.sql.Connection;
import edu.xscj.conn.ConnectDataBase;
import java.sql.PreparedStatement;

public class DeleteCourseAction {
    Connection conn = null;

    public DeleteCourseAction() {
        if (conn == null) {
            conn = ConnectDataBase.getConn();
        }
    }

    public void setConn() {
        if (conn == null) {
            conn = ConnectDataBase.getConn();
        }
    }

    public void deleteCourse(String courNo) {
       PreparedStatement pstmt = null;
       try {
           if (conn == null) {
               this.setConn();
           }
           pstmt = conn.prepareStatement("delete from student where courNo=?");
           pstmt.setString(1, courNo);
           pstmt.execute();
       } catch (Exception ex) {
       } finally {
           try {
               if (pstmt != null) {
                   pstmt.close();
               }
               if (conn != null) {
                   conn.close();
               }
           } catch (Exception e) {
               e.printStackTrace();
           }
       }
   }


}