SpringMvc 上传excel（注解和非注解两种方式）

谁借莪１个温暖的怀抱￠ 2022-07-28 09:35 229阅读 0赞

1、第一种方式：

A:JSP页面：

<form name="importForm" action="${ctx }/service/userService/BatchImport.do" method="post" enctype="multipart/form-data">
    
    请选择上传所需文件：<input type="file" id="theFile" name="theFile" /><br/>
    <input  type="submit" value="提交"/>
    </form>

B: Controller 层

@Controller
    @RequestMapping("/service/userService")
    public class LoadUserServiceAction { 
    
        @Reference
        UserHelper userHelper;
        @Reference
        ClassHelper classHelper;
        @Reference
        InstitutionHelper institutionHelper;
    
        @RequestMapping("/BatchImport")
        public void BatchImport(HttpServletRequest request, HttpServletResponse response)
                throws Exception {
            response.setContentType("application/json");
            response.setCharacterEncoding("utf-8");
            PrintWriter pw = null;
            request.setCharacterEncoding("utf-8");
            int roleID = NumberUtils.toInt(request.getParameter("role"));
            int organID = NumberUtils.toInt(request.getParameter("organ"));
            //是否忽略警告
            boolean ignoreWarning = BooleanUtils.toBoolean(request.getParameter("ignore"));
            MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
            MultipartFile importFile = multipartRequest.getFile("theFile");
                try {
                JSONObject json = new JSONObject();
                json.put("needConfirm", false);
                pw = response.getWriter();
                if(importFile == null){
                    json.put("error", "未读取到文件");
                    pw.print(json.toString());
                }else{
                    Workbook workbook = null;
                    String fileName = importFile.getOriginalFilename();
                    if(StringUtils.isNotBlank(fileName)){
                        String[] strArr = fileName.split("\\.");
                        if(strArr != null && strArr.length > 0){
                            if("xls".equals(strArr[strArr.length - 1])){
                                workbook = new HSSFWorkbook(importFile.getInputStream());
                            } else if("xlsx".equals(strArr[strArr.length - 1])){
                                workbook = new XSSFWorkbook(importFile.getInputStream());
                            } else {
                                json.put("error", "无法读取的文件格式");
                                pw.print(json.toString());
                            }
                        }
                    }
    
                    StringBuilder errorReason = new StringBuilder();
                    if(organID < 0){
                        json.put("error", "读取不到正确的机构id");
                        pw.print(json.toString());
                    }
                    List<Object[]> objsArrList = readExcel(workbook, organID, roleID);
                    boolean needConfirm = checkData(objsArrList, roleID, errorReason);
                    if(errorReason.length() > 0 && 
                            ( (needConfirm && ! ignoreWarning) || !needConfirm )){
                        json.put("needConfirm", needConfirm);
                        json.put("error", errorReason.toString().replaceAll("\\[|]", ""));
                        pw.print(json.toString());
                    }
                    userHelper.saveUserObjects(objsArrList);
                    pw.print("success");
                }
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if(pw != null){
                    pw.flush();
                    pw.close();
                }
            }
         }
         /** * 检查数据 * @param objsArrList 对象数组 * @param errorReason 错误原因 */
        private boolean checkData(List<Object[]> objsArrList, int roleID, StringBuilder errorReason){
            //这是省略了检验数据的代码。。。。
        }
    /** * 读取excel并且形成对象 * @param workbook 工作簿对象 * @return */
        private List<Object[]> readExcel(Workbook workbook, int organID, int roleID){
            List<Object[]> objsArr = new ArrayList<Object[]>();
            //得到工作簿开始解析数据
            Sheet sheet = workbook.getSheetAt(0);
            //处理数据
        }
    }

2、采用注解的方式接受jsp传过来的文件

A: jsp 页面不变  
B: Controller 层  
其实和上面差不多 主要的区别就是在方法里添加了参数，该参数采用注解的方式，前提条件是要求参数名和jsp中的文件的name值**必须一致**，否则得到的是null；  
具体代码：

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