spring boot实现自动输出word文档功能的实例代码

spring boot实现自动输出word文档功能

本文用到Apache POI组件
组件依赖在pom.xml文件中添加

<dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.1.0</version>
        </dependency>

首先创建相关的实体类、编写需要用到的sql查询。

import lombok.Data;

// 选择题实体
@Data
public class MultiQuestion {
    private Integer questionId;

    private String subject;

    private String section;

    private String answerA;

    private String answerB;

    private String answerC;

    private String answerD;

    private String question;

    private String level;

    private String rightAnswer;

    private String analysis; //题目解析

    private Integer score;
 }

import lombok.Data;

//填空题实体类
@Data
public class FillQuestion {
    private Integer questionId;

    private String subject;

    private String question;

    private String answer;

    private Integer score;

    private String level;

    private String section;

    private String analysis; //题目解析
 }

import lombok.Data;

//判断题实体类
@Data
public class JudgeQuestion {
    private Integer questionId;

    private String subject;

    private String question;

    private String answer;

    private String level;

    private String section;

    private Integer score;

    private String analysis; //题目解析
}

创建好要用到的实体类之后，利用mybatis写sql查询，可以分为两种：1、配置mapper.xml文件路径，在xml文件中编写sql语句。2、直接使用注解。本文使用方法为第二种。

@Mapper
public interface MultiQuestionMapper {
    /**
     * select * from multiquestions where questionId in (
     * 	select questionId from papermanage where questionType = 1 and paperId = 1001
     * )
     */
    @Select("select * from multi_question where questionId in (select questionId from paper_manage where questionType = 1 and paperId = #{paperId})")
    List<MultiQuestion> findByIdAndType(Integer PaperId);

    @Select("select * from multi_question")
    IPage<MultiQuestion> findAll(Page page);

    /**
     * 查询最后一条记录的questionId
     * @return MultiQuestion
     */
    @Select("select questionId from multi_question order by questionId desc limit 1")
    MultiQuestion findOnlyQuestionId();

    @Options(useGeneratedKeys = true,keyProperty = "questionId")
    @Insert("insert into multi_question(subject,question,answerA,answerB,answerC,answerD,rightAnswer,analysis,section,level) " +
            "values(#{subject},#{question},#{answerA},#{answerB},#{answerC},#{answerD},#{rightAnswer},#{analysis},#{section},#{level})")
    int add(MultiQuestion multiQuestion);

    @Select("select questionId from multi_question  where subject =#{subject} order by rand() desc limit #{pageNo}")
    List<Integer> findBySubject(String subject,Integer pageNo);

}

//填空题
@Mapper
public interface FillQuestionMapper {

    @Select("select * from fill_question where questionId in (select questionId from paper_manage where questionType = 2 and paperId = #{paperId})")
    List<FillQuestion> findByIdAndType(Integer paperId);

    @Select("select * from fill_question")
    IPage<FillQuestion> findAll(Page page);

    /**
     * 查询最后一条questionId
     * @return FillQuestion
     */
    @Select("select questionId from fill_question order by questionId desc limit 1")
    FillQuestion findOnlyQuestionId();

    @Options(useGeneratedKeys = true,keyProperty ="questionId" )
    @Insert("insert into fill_question(subject,question,answer,analysis,level,section) values " +
            "(#{subject,},#{question},#{answer},#{analysis},#{level},#{section})")
    int add(FillQuestion fillQuestion);

    @Select("select questionId from fill_question where subject = #{subject} order by rand() desc limit #{pageNo}")
    List<Integer> findBySubject(String subject,Integer pageNo);
}

//判断题

@Mapper
public interface JudgeQuestionMapper {

    @Select("select * from judge_question where questionId in (select questionId from paper_manage where questionType = 3 and paperId = #{paperId})")
    List<JudgeQuestion> findByIdAndType(Integer paperId);

    @Select("select * from judge_question")
    IPage<JudgeQuestion> findAll(Page page);

    /**
     * 查询最后一条记录的questionId
     * @return JudgeQuestion
     */
    @Select("select questionId from judge_question order by questionId desc limit 1")
    JudgeQuestion findOnlyQuestionId();

    @Insert("insert into judge_question(subject,question,answer,analysis,level,section) values " +
            "(#{subject},#{question},#{answer},#{analysis},#{level},#{section})")
    int add(JudgeQuestion judgeQuestion);

    @Select("select questionId from judge_question  where subject=#{subject}  order by rand() desc limit #{pageNo}")
    List<Integer> findBySubject(String subject,Integer pageNo);
}

写好mapper底层查询后，需要创建service及其实现类来调用mapper底层。例如：

public interface JudgeQuestionService {

    List<JudgeQuestion> findByIdAndType(Integer paperId);

    IPage<JudgeQuestion> findAll(Page<JudgeQuestion> page);

    JudgeQuestion findOnlyQuestionId();

    int add(JudgeQuestion judgeQuestion);

    List<Integer> findBySubject(String subject,Integer pageNo);
}

@Service
public class JudgeQuestionServiceImpl implements JudgeQuestionService {

    @Autowired
    private JudgeQuestionMapper judgeQuestionMapper;

    @Override
    public List<JudgeQuestion> findByIdAndType(Integer paperId) {
        return judgeQuestionMapper.findByIdAndType(paperId);
    }

    @Override
    public IPage<JudgeQuestion> findAll(Page<JudgeQuestion> page) {
        return judgeQuestionMapper.findAll(page);
    }

    @Override
    public JudgeQuestion findOnlyQuestionId() {
        return judgeQuestionMapper.findOnlyQuestionId();
    }

    @Override
    public int add(JudgeQuestion judgeQuestion) {
        return judgeQuestionMapper.add(judgeQuestion);
    }

    @Override
    public List<Integer> findBySubject(String subject, Integer pageNo) {
        return judgeQuestionMapper.findBySubject(subject,pageNo);
    }
}

最后将输出文件方法写在controller层：

@RequestMapping("/exam/exportWord")
    public void exportWord(int examCode, HttpServletResponse response) throws FileNotFoundException{
    //由于题目应于考试信息对应 所以需要先查出考试信息后根据pageId来查找对应的组卷信息
        ExamManage res = examManageService.findById(examCode);
        int paperId = res.getPaperId();
        List<MultiQuestion> multiQuestionRes = multiQuestionService.findByIdAndType(paperId);   //选择题题库 1
        List<FillQuestion> fillQuestionsRes = fillQuestionService.findByIdAndType(paperId);     //填空题题库 2
        List<JudgeQuestion> judgeQuestionRes = judgeQuestionService.findByIdAndType(paperId);
        //响应到客户端
        XWPFDocument document= new XWPFDocument();
        //分页
        XWPFParagraph firstParagraph = document.createParagraph();
        //格式化段落
        firstParagraph.getStyleID();
        XWPFRun run = firstParagraph.createRun();
        int i = 1;
        run.setText("一、选择题" + "\r\n"); //换行
        for (MultiQuestion multiQuestion : multiQuestionRes) {
            String str = multiQuestion.getQuestion();
            String str1 = multiQuestion.getAnswerA();
            String str2 = multiQuestion.getAnswerB();
            String str3 = multiQuestion.getAnswerC();
            String str4 = multiQuestion.getAnswerD();
            run.setText(i + ". " + str + "\r\n");
            run.setText("A. " + str1 + "\r\n");
            run.setText("B. " + str2 + "\r\n");
            run.setText("C. " + str3 + "\r\n");
            run.setText("D. " + str4 + "\r\n");
            i++;
        }
        run.setText("二、填空题" + "\r\n");
        for (FillQuestion fillQuestion : fillQuestionsRes) {
            String str = fillQuestion.getQuestion();
            run.setText(i + ". " + str + "\r\n");
            i++;
        }
        run.setText("三、判断题" + "\r\n");
        for (JudgeQuestion judgeQuestion : judgeQuestionRes) {
            String str = judgeQuestion.getQuestion();
            run.setText(i + ". " + str + "\r\n");
            i++;
        }
        document.createTOC();

        try {
            //设置相应头
            this.setResponseHeader(response, res.getSource() + "试卷.doc");
            //输出流
            OutputStream os = response.getOutputStream();
            document.write(os);
            os.flush();
            os.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 发送响应流方法
     */
    private void setResponseHeader(HttpServletResponse response, String fileName) {
        try {
            try {
                fileName = URLEncoder.encode(fileName, "UTF-8");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            response.setContentType("application/octet-stream;charset=UTF-8");
            response.setHeader("Content-Disposition", "attachment;filename="+ fileName);
            //遵守缓存规定
            response.addHeader("Pargam", "no-cache");
            response.addHeader("Cache-Control", "no-cache");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

效果：

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