struts2+bootstrap-fileinput+poi 实现读取excel文件到数据库

//js代码function initUpload(){
    $("#uploadfile").fileinput({
        language: ‘zh‘, //设置语言
        uploadUrl: $("body").attr("data-url")+"/permission/roleUpload!upload.action", //上传的地址
        allowedFileExtensions: [‘xls‘, ‘xlsx‘],//接收的文件后缀
        //uploadExtraData:{"id": 1, "fileName":‘123.mp3‘},
        uploadAsync: true, //默认异步上传
        showUpload: true, //是否显示上传按钮
        showRemove : true, //显示移除按钮
        showPreview : true, //是否显示预览
        showCaption: false,//是否显示标题
        browseClass: "btn btn-primary", //按钮样式
        dropZoneEnabled: false,//是否显示拖拽区域
        //minImageWidth: 50, //图片的最小宽度
        //minImageHeight: 50,//图片的最小高度
        //maxImageWidth: 1000,//图片的最大宽度
        //maxImageHeight: 1000,//图片的最大高度
        //maxFileSize: 0,//单位为kb，如果为0表示不限制文件大小
        //minFileCount: 0,
        maxFileCount: 10, //表示允许同时上传的最大文件个数
        enctype: ‘multipart/form-data‘,
        validateInitialCount:true,
        previewFileIcon: "<i class=‘glyphicon glyphicon-king‘></i>",
        msgFilesTooMany: "选择上传的文件数量({n}) 超过允许的最大数值{m}！",
    });
}

jsp代码

<!-- 文件上传 -->

<label class="control-label">请选择要导入的Excel文件：</label>
<input type="file" name="uploadFiles" id="uploadfile"  class="file-loading" />
  <s:fielderror></s:fielderror>

后台action代码

    public String upload(){
        String savePath=ServletActionContext.getServletContext().getRealPath("/static/upload/");

        File uploadDir=new File(savePath);
        if(!uploadDir.exists()){
            uploadDir.mkdirs();
        }
        SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMdd");
        String ymd=sdf.format(new Date());
        savePath+="/"+ymd+"/";
        File dirFile=new File(savePath);
        if(!dirFile.exists()){
            dirFile.mkdirs();
        }
        if(this.uploadFiles!=null){
            for(int i=0;i<uploadFiles.size();i++){
                String fileExt=uploadFilesFileName.get(i).substring(uploadFilesFileName.get(i).lastIndexOf(".")+1).trim().toLowerCase();
                List<String>arr=Arrays.asList(extMap.split(","));
                if(!arr.contains(fileExt)){
                    super.addActionError(this.uploadFilesFileName.get(i)+"文件类型错误！只允许"+extMap+"格式。");
                    continue;
                }
                SimpleDateFormat sdfForFileName=new SimpleDateFormat("yyyyMMddHHmmss");
                String newName=sdfForFileName.format(new Date())+"_"+new Random().nextInt(1000)+"."+fileExt;
                File destFile=new File(dirFile,newName);
                try {
                    FileUtils.copyFile(uploadFiles.get(i), destFile);
                    List<List<String>>roles=ExcelUtil.readXlsx(savePath+newName);
                    for(List<String> row:roles){
                        Role role=new Role();
                        role.setRoleName(row.get(1));
                        rolebiz.insert(role);
                    }
                } catch (Exception e) {
                    super.addActionError(this.uploadFilesFileName.get(i)+"上传失败！"+e.getMessage());

                    continue;
                }
            }
        }
        System.out.println("保存路径："+savePath);
        return SUCCESS;
    }

后台POI解析excel代码

public class ExcelUtil {

    public static List<List<String>> readXlsx(String path){
        List<List<String>> result=new ArrayList<List<String>>();
        try {
            InputStream input=new FileInputStream(path);
            XSSFWorkbook workbook=new XSSFWorkbook(input);

            for(XSSFSheet xssfSheet:workbook){
                if(xssfSheet==null){
                    continue;
                }
                for(int rowNum=1;rowNum<=xssfSheet.getLastRowNum();rowNum++){
                    XSSFRow row=xssfSheet.getRow(rowNum);
                    int minCellNum=row.getFirstCellNum();
                    int maxCellNum=row.getLastCellNum();
                    List<String>rowList=new ArrayList<String>();
                    for(int i=minCellNum;i<maxCellNum;i++){
                        XSSFCell cell=row.getCell(i);
                        if(cell==null){
                            continue;
                        }
                        rowList.add(cell.toString());
                    }
                    result.add(rowList);
                }
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return result;
    }

    public static List<List<String>> readXls(String path){
        List<List<String>> result=new ArrayList<List<String>>();
        try {
            InputStream input=new FileInputStream(path);
            HSSFWorkbook workbook=new HSSFWorkbook(input);
            for(int numSheet=0;numSheet<workbook.getNumberOfSheets();numSheet++){
                HSSFSheet sheet=workbook.getSheetAt(numSheet);
                if(sheet==null){
                    continue;
                }
                for(int rowNum=1;rowNum<=sheet.getLastRowNum();rowNum++){
                    HSSFRow row=sheet.getRow(rowNum);
                    int minCellNum=row.getFirstCellNum();
                    int maxCellNum=row.getLastCellNum();
                    List<String> rowList=new ArrayList<String>();
                    for(int i=minCellNum;i<maxCellNum;i++){
                        HSSFCell cell=row.getCell(i);
                        if(cell==null){
                            continue;
                        }
                        rowList.add(getStringVal(cell));
                    }
                            result.add(rowList);
                }
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return result;
    }

    private static String getStringVal(HSSFCell cell) {
        switch (cell.getCellType()) {
        case Cell.CELL_TYPE_BOOLEAN:
            return cell.getBooleanCellValue() ? "TRUE" : "FALSE";
        case Cell.CELL_TYPE_FORMULA:
            return cell.getCellFormula();
        case Cell.CELL_TYPE_NUMERIC:
            cell.setCellType(Cell.CELL_TYPE_STRING);
            return cell.getStringCellValue();
        case Cell.CELL_TYPE_STRING:
            return cell.getStringCellValue();
        default:
            return null;
        }
    }

}