@Override
public int updateDao(Object obj) {
Connection con = MysqlCon.getConnection();
String sql =
"update course set code=?, depart_code=?, subject=?, "
+ "material=?, prof_code=? where code = ?";
PreparedStatement pstmt = null;
Course course = (Course) obj;
try {
pstmt = con.prepareStatement(sql);
pstmt.setInt(1, course.getCode());
pstmt.setInt(2, course.getDepart_code());
pstmt.setString(3, course.getSubject());
pstmt.setString(4, course.getMaterial());
pstmt.setInt(5, course.getProf_code());
pstmt.setInt(6, course.getCode());
pstmt.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
return -1;
} finally {
try {
pstmt.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return 0;
}
@Override
public ArrayList<Object> selectDao() {
Connection con = MysqlCon.getConnection();
String sql = "select 강좌코드, 학과, 강좌명, 교재명, 교수명 from view_course_depart_prof";
ArrayList<Object> courses = new ArrayList<>();
PreparedStatement pstmt = null;
ResultSet rs = null;
try {
pstmt = con.prepareStatement(sql);
rs = pstmt.executeQuery();
while (rs.next()) {
courses.add(
new ViewCourse(
rs.getInt(1), rs.getString(2), rs.getString(3), rs.getString(4), rs.getString(5)));
}
return courses;
} catch (SQLException e) {
e.printStackTrace();
return null;
} finally {
try {
pstmt.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public Object selectTableByProfCode(int prof_code) {
Connection con = MysqlCon.getConnection();
String sql =
"select code, depart_code, subject, material, prof_code from course"
+ " where prof_code = ?";
PreparedStatement pstmt = null;
ResultSet rs = null;
try {
pstmt = con.prepareStatement(sql);
pstmt.setInt(1, prof_code);
rs = pstmt.executeQuery();
if (rs.next()) {
return new Course(
rs.getInt(1), rs.getInt(2), rs.getString(3), rs.getString(4), rs.getInt(5));
}
} catch (SQLException e) {
e.printStackTrace();
return null;
} finally {
try {
pstmt.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return null;
}
public int selectMaxCode(int depart_code) {
Connection con = MysqlCon.getConnection();
String sql = "select max(code) from course" + " where depart_code = ?";
PreparedStatement pstmt = null;
ResultSet rs = null;
try {
pstmt = con.prepareStatement(sql);
pstmt.setInt(1, depart_code);
rs = pstmt.executeQuery();
if (rs.next()) {
return rs.getInt(1);
}
} catch (SQLException e) {
e.printStackTrace();
return -1;
} finally {
try {
pstmt.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return -1;
}
@Override
public int insertDao(Object obj) {
Connection con = MysqlCon.getConnection();
String sql =
"insert into course (code, depart_code, subject, material, prof_code) values "
+ "(?, ?, ?, ?, ?) ";
PreparedStatement pstmt = null;
Course course = (Course) obj;
try {
pstmt = con.prepareStatement(sql);
pstmt.setInt(1, course.getCode());
pstmt.setInt(2, course.getDepart_code());
pstmt.setString(3, course.getSubject());
pstmt.setString(4, course.getMaterial());
pstmt.setInt(5, course.getProf_code());
pstmt.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
return -1;
} finally {
try {
pstmt.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return 0;
}
public ArrayList<String> selectTableAllListByCode(int code) {
Connection con = MysqlCon.getConnection();
ArrayList<String> arLists = new ArrayList<>();
String sql = "select code, subject from course where prof_code = ?";
PreparedStatement pstmt = null;
ResultSet rs = null;
try {
pstmt = con.prepareStatement(sql);
pstmt.setInt(1, code);
rs = pstmt.executeQuery();
while (rs.next()) {
arLists.add(rs.getInt(1) + ":" + rs.getString(2));
}
} catch (SQLException e) {
e.printStackTrace();
return null;
}
return arLists;
}
@Override
public int deleteDao(int regNo) {
Connection con = MysqlCon.getConnection();
String sql = "delete from course where code = ?";
PreparedStatement pstmt = null;
try {
pstmt = con.prepareStatement(sql);
pstmt.setInt(1, regNo);
pstmt.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
return -1;
} finally {
try {
pstmt.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return 0;
}
