Javaを使ってオンライン試験システムの試験用紙印刷機能を記述する方法

<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.19</version>
</dependency>

public class ExamPaper {
    private List<Question> questions;
    
    // getter and setter methods
    
    // 添加题目
    public void addQuestion(Question question) {
        questions.add(question);
    }
    
    // 打印试卷
    public void print() {
        try {
            PDDocument document = new PDDocument();
            
            for (int i = 0; i < questions.size(); i++) {
                Question question = questions.get(i);
                
                PDPage page = new PDPage();
                document.addPage(page);
                
                PDPageContentStream contentStream = new PDPageContentStream(document, page);
                contentStream.setFont(PDType1Font.TIMES_ROMAN, 12);
                contentStream.newLineAtOffset(50, 700);
                contentStream.showText("Question " + (i+1) + ": " + question.getQuestionContent());
                
                // 打印选项和答案等信息
                
                contentStream.endText();
                contentStream.close();
            }
            
            document.save("exam_paper.pdf");
            document.close();
            
            System.out.println("试卷打印成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

public class Question {
    private String questionContent;
    private List<String> options;
    private String answer;
    
    // getter and setter methods
    
    // 构造方法
    
    // 添加选项
    public void addOption(String option) {
        options.add(option);
    }
}

public class Main {
    public static void main(String[] args) {
        // 创建试卷对象
        ExamPaper examPaper = new ExamPaper();
        
        // 创建题目对象
        Question question1 = new Question("问题1的内容");
        question1.addOption("选项A");
        question1.addOption("选项B");
        question1.addOption("选项C");
        question1.setAnswer("答案A");
        
        // 将题目添加至试卷中
        examPaper.addQuestion(question1);
        
        // 打印试卷
        examPaper.print();
    }
}