Using Java to implement the examination arrangement adjustment function of the online examination system

Java implementation of the examination arrangement adjustment function of the online examination system

Introduction:
With the development of Internet technology, more and more schools and training institutions choose Examinations and assessments are conducted using an online examination system. Examination schedule adjustment is an important function in the online examination system, which can help administrators flexibly adjust examination time and examination-related information according to the actual situation. This article will introduce in detail how to use Java programming to implement the examination schedule adjustment function of the online examination system, and give specific code examples.

1. Database Design
   The exam schedule adjustment function requires the storage of exam-related information in the database. The following is the structural design of the exam table (exam):

exam_id: Exam ID
course_id: Course ID
start_time: Exam start time
end_time: Exam end time
room_id: Exam room ID
...

2. Exam information query
   Before implementing the exam arrangement adjustment function, you need to implement the exam information query function first so that the administrator can understand the current Examination arrangements. The following is a code example for querying exam information:

public class ExamManagement {
    // 查询考试信息
    public List<Exam> queryExams() {
        List<Exam> exams = new ArrayList<>();
        
        // 连接数据库，执行查询语句
        try(Connection conn = DriverManager.getConnection(url, username, password);
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("SELECT * FROM exam")) {
            
            // 遍历查询结果集，将考试信息存储到List中
            while(rs.next()) {
                Exam exam = new Exam();
                
                exam.setId(rs.getInt("exam_id"));
                exam.setCourseId(rs.getInt("course_id"));
                exam.setStartTime(rs.getTimestamp("start_time"));
                exam.setEndTime(rs.getTimestamp("end_time"));
                exam.setRoomId(rs.getInt("room_id"));
                // ...
                
                exams.add(exam);
            }
            
        } catch(SQLException e) {
            e.printStackTrace();
        }
        
        return exams;
    }
}

3. Exam arrangement adjustment
   The exam arrangement adjustment function is mainly to modify exam-related information, such as exam time, exam classroom, etc. The following is a code example for exam arrangement adjustment:

public class ExamManagement {
    // 调整考试信息
    public void adjustExam(int examId, Date startTime, Date endTime, int roomId) {
        // 连接数据库，执行更新语句
        try(Connection conn = DriverManager.getConnection(url, username, password);
            PreparedStatement pstmt = conn.prepareStatement("UPDATE exam SET start_time=?, end_time=?, room_id=? WHERE exam_id=?")) {
            
            pstmt.setTimestamp(1, new Timestamp(startTime.getTime()));
            pstmt.setTimestamp(2, new Timestamp(endTime.getTime()));
            pstmt.setInt(3, roomId);
            pstmt.setInt(4, examId);
            
            pstmt.executeUpdate();
            
        } catch(SQLException e) {
            e.printStackTrace();
        }
    }
}

Conclusion:
This article introduces how to use Java programming to implement the exam arrangement adjustment function of the online examination system. Through code examples for querying exam information and adjusting exam information, administrators can flexibly adjust exam time and related information, improving the efficiency and flexibility of exam management. Of course, in actual projects, rights management, input verification, etc. also need to be considered to ensure system safety and reliability.

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