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("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);
@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);
@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);
@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();
}
}
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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