在项目中涉及题库的批量上传功能，在此利用formdata进行文件上传，后台读取，进行批量插入。同时还需要带入teacherId和courseId两个参数，所以将文件和两个参数append到formdata中，传到后台。
JQuery 函数的提交按钮执行的函数如下：
<script type="text/javascript"> //批量上传题库 function fileSubmit() { var questionFile = new FormData(); var fileObj = document.getElementById("questionFile").files[0]; // js 获取文件对象，questionFile为文件选择框的Id questionFile.append("file", fileObj); var teacherId=localStorage.getItem("teacherId"); questionFile.append("teacherId",teacherId); var courseId=localStorage.getItem("courseId"); questionFile.append("courseId",courseId); $.ajax({ async: false, type:"post", url:"/questions/batchUpload", data:questionFile, processData : false, //必须false才会避开jQuery对 formdata 的默认处理 contentType : false, //必须false才会自动加上正确的Content-Type success:function (data) { layer.msg("上传成功"); example.ajax.reload(); } }); } </script>
需要注意的是以下两点：
jQuery 的 ajax 中processData设置为false （表示不需要对数据做处理）
jQuery 的 ajax 中contentType设置为false （因为前面已经声明了是‘FormData对象'）
Controller 中的方法如下：
@ApiOperation(value = "批量上传题库") @RequestMapping(value = "/batchUpload",method = RequestMethod.POST) public void batchUploadQuestions(HttpServletRequest request) throws Exception{ Collection<Part> files = request.getParts(); questionsService.batchUploadQuestions(files); }
Service中的方法如下：
//题库的批量上传 @Override public void batchUploadQuestions(Collection<Part> files) throws Exception { Iterator<Part> it = files.iterator(); Part file = it.next(); Workbook workbook = null; if (file.getSubmittedFileName().endsWith("xlsx")) { workbook = new XSSFWorkbook(file.getInputStream()); } else if (file.getSubmittedFileName().endsWith("xls")) { workbook = new HSSFWorkbook(file.getInputStream()); } Cell cell = null; List<Questions> questionsList = new ArrayList<>(); //判断Excel中有几张表，目前设定为一张表 Sheet sheet = workbook.getSheetAt(0);//获取sheet表 for (int rowIndex = 2; rowIndex <= sheet.getLastRowNum(); rowIndex++) { //获取到一行 Row row = sheet.getRow(rowIndex); if (row == null) { continue; } Questions questions = new Questions(); List<String> strList = new ArrayList<>(); for (int i = 1; i < row.getLastCellNum(); i++) { //获取到一列，第一列为序号不需要存入数据库，所以从1开始读 cell = row.getCell(i); String value = ""; switch (cell.getCellTypeEnum()) { case _NONE: break; case STRING: value = cell.getStringCellValue(); break; case NUMERIC: Pattern points_ptrn = Pattern.compile("0.0+_*[^/s]+"); if (DateUtil.isCellDateFormatted(cell)) {//日期 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); value = sdf.format(DateUtil.getJavaDate(cell.getNumericCellValue())); } else if ("@".equals(cell.getCellStyle().getDataFormatString()) || "General".equals(cell.getCellStyle().getDataFormatString()) || "0_".equals(cell.getCellStyle().getDataFormatString())) { //文本 or 常规 or 整型数值 DecimalFormat df = new DecimalFormat("0"); value = df.format(cell.getNumericCellValue()); } else if (points_ptrn.matcher(cell.getCellStyle().getDataFormatString()).matches()) {//正则匹配小数类型 value = String.valueOf(cell.getNumericCellValue());//直接显示 } break; default: value = cell.toString(); } if ((i == 2 || i == 3) && value.equals("")) {//此处设计不需要读入的单元格 strList.clear(); break; } strList.add(value); } if (strList.size() == 9) { //对应数据库属性进行存储 questions.setChapter(strList.get(0)); questions.setSection(strList.get(1)); questions.setType(strList.get(2)); questions.setQuestion(strList.get(3)); questions.setAnswerA(strList.get(4)); questions.setAnswerB(strList.get(5)); questions.setAnswerC(strList.get(6)); questions.setAnswerD(strList.get(7)); questions.setAnswerTrue(strList.get(8)); questionsList.add(questions); } } //将前台存进的teacherId也当做文件进行读取 Part file1 = it.next(); InputStream inputStream = file1.getInputStream(); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream)); String line = null; String teacherId = ""; while ((line = bufferedReader.readLine()) != null) { teacherId = line; } //将前台传入的courseId当做文件读取 Part file2 = it.next(); InputStream inputStream1 = file2.getInputStream(); BufferedReader bufferedReader1 = new BufferedReader(new InputStreamReader(inputStream1)); String line1 = null; String courseId = ""; while ((line1 = bufferedReader1.readLine()) != null) { courseId = line1; } batchSaveQuestionList(teacherId, courseId, questionsList); } //SQL 语句拼接后传入DAO层进行数据插入 public void batchSaveQuestionList(String teacherId,String courseId,List<Questions> questionsList){ String sql = "replace into questions(questionId,courseId,teacherId,chapter,section,type,question,answerA,answerB,answerC,answerD,answerTrue) values"; for(int i = 0;i<questionsList.size();i++){ String questionId = String.valueOf(System.currentTimeMillis())+i; if(i==0){ sql+="('"+questionId+"','"+courseId+"','"+teacherId+"','"+questionsList.get(i).getChapter()+"','"+questionsList.get(i).getSection() + "','"+questionsList.get(i).getType()+"','"+questionsList.get(i).getQuestion()+ "','"+ questionsList.get(i).getAnswerA() +"','"+questionsList.get(i).getAnswerB()+"','"+questionsList.get(i).getAnswerC()+"','"+questionsList.get(i).getAnswerD() +"','"+questionsList.get(i).getAnswerTrue()+"')"; }else{ sql+=",('"+questionId+"','"+courseId+"','"+teacherId+"','"+questionsList.get(i).getChapter()+"','"+questionsList.get(i).getSection() + "','"+questionsList.get(i).getType()+"','"+questionsList.get(i).getQuestion()+ "','"+ questionsList.get(i).getAnswerA() +"','"+questionsList.get(i).getAnswerB()+"','"+questionsList.get(i).getAnswerC()+"','"+questionsList.get(i).getAnswerD() +"','"+questionsList.get(i).getAnswerTrue()+"')"; } } questionsDao.batchSaveQuestionList(sql); }
DAO层的数据插入语句：
@Insert("${sql}") void batchSaveQuestionList(@Param("sql") String sql);
自此即可实现批量上传，需要注意的是，这里定义的文件类型为Part类型。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家，关注脚本之家公众号的更多精彩内容。
您可能感兴趣的文章: