【Java用法】使用Java导出word文档的解决方案（适用于从服务器上下载到本地电脑）

    @ApiOperation(value = "根据examId导出word文档")
    @RequestMapping(value = "/word", method = RequestMethod.POST)
    public void word(@RequestBody ExamExportDTO examExportDTO, HttpServletResponse response) {
        // 写出到客户端下载（即写出到Servlet）
        Word07Writer word07Writer = examService.word(examExportDTO);
        // response是HttpServletResponse对象
        response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document;charset=utf-8");
        // test.docx是弹出下载对话框的文件名，不能为中文，中文请自行编码
        response.setHeader("Content-Disposition", "attachment;filename=test.docx");
        ServletOutputStream out = null;
        try {
            out = response.getOutputStream();
        } catch (IOException e) {
            log.error("根据examId导出word文档失败！", e);
        }
        // 写出到目标流
        word07Writer.flush(out);
        // 关闭writer，释放内存
        word07Writer.close();
        // 关闭输出Servlet流
        IoUtil.close(out);
    }

    /**
     * 试卷导出word文档
     *
     * @param examExportDTO 试卷id和是否导出答案
     * @return 当前文件导出的路径位置
     */
    Word07Writer word(ExamExportDTO examExportDTO);

    @Override
    public Word07Writer word(ExamExportDTO examExportDTO) {
        Integer examId = examExportDTO.getExamId();
        Integer isExportAnswer = examExportDTO.getIsExportAnswer();
        Word07Writer word07Writer = new Word07Writer();
        // 1、得到当前试卷信息
        Exam exam = this.getById(examId);
        // 1.1 保存试卷名称
        word07Writer.addText(new Font("方正小标宋简体", Font.PLAIN, 22), "试卷名称：" + exam.getTitle());
        // 2、得到当前试卷的题目列表
        List<Integer> quIds = quExamService.listByExamId(examId);
        // 题目列表用
        int count = 1;
        for (Integer quId : quIds) {
            // 3、得到当前题目信息
            Question question = questionMapper.selectById(quId);
            // 4、保存到文件中：题目 格式为（ 题目2. 多选题测试（20分））
            word07Writer.addText(new Font("宋体", Font.PLAIN, 15),
                    "题目" + (count++) + ". " + question.getContent() + "（" + (question.getQuScore()) + "分）");
            // 5、得到每个题目的选项列表
            List<QuAnswerDTO> quAnswerDTOList = quAnswerService.listByQu(quId);
            // 6、答案和解析
            StringBuilder answers = new StringBuilder();
            // 题目类型 1 单选题 2 多选题 3 判断题 4 简答题 5 填空题
            Integer quType = question.getQuType();
            for (QuAnswerDTO quAnswerDTO : quAnswerDTOList) {
                // 添加题目选项
                word07Writer.addText(new Font("宋体", Font.PLAIN, 10),
                        quAnswerDTO.getAbc() + "、" + quAnswerDTO.getContent());
                if (isExportAnswer == Constants.NUMBER_ONE) {
                    // 得到题目选项的答案 1 正确答案，0 错误答案
                    Integer isRight = quAnswerDTO.getIsRight();
                    String dtoAbc = quAnswerDTO.getAbc();
                    // 得到正确答案
                    this.getAnswers(quType, isRight, answers, dtoAbc);
                }
            }
            if (isExportAnswer == Constants.NUMBER_ONE) {
                // 7、得到答案并保存到文件中
                word07Writer.addText(new Font("宋体", Font.PLAIN, 10), "答案：" + answers);
                // 8、得到题目整体解析
                String analysis = question.getAnalysis();
                word07Writer.addText(new Font("宋体", Font.PLAIN, 10),
                        "解析：" + (Objects.isNull(analysis) ? "暂无解析" : analysis));
            }
        }
        return word07Writer;
    }
    /**
     * 得到答案
     *
     * @param quType  题目类型 1 单选题 2 多选题 3 判断题 4 简答题 5 填空题
     * @param isRight 是否为正确答案 1 正确答案，0 错误答案
     * @param answers 得到的答案
     * @param dtoAbc  选项ABC
     */
    private void getAnswers(Integer quType, Integer isRight, StringBuilder answers, String dtoAbc) {
        if (quType == Constants.QU_TYPE_SINGLE && isRight == Constants.NUMBER_ONE) {
            answers.append(dtoAbc);
        }
        if (quType == Constants.QU_TYPE_MULTI && isRight == Constants.NUMBER_ONE) {
            answers.append(dtoAbc);
        }
        if (quType == Constants.QU_TYPE_JUDGE && isRight == Constants.NUMBER_ONE) {
            answers.append(dtoAbc);
        }
        if (quType == Constants.QU_TYPE_SHORT && isRight == Constants.NUMBER_ONE) {
            answers.append(dtoAbc);
        }
        if (quType == Constants.QU_TYPE_FILL && isRight == Constants.NUMBER_ONE) {
            answers.append(dtoAbc);
        }
    }