上传文件

1.head引用

<script type="text/javascript" src="<%=request.getContextPath() %>/js/ajaxfileupload.js"></script>

2.重写下面方法

        function ajaxFileUpload() {
            var elementIds=["flag"]; //flag为id、name属性名
            $.ajaxFileUpload({
                url: 'importSemzzTongjiExcel.action', 
                type: 'post',
                secureuri: false, //一般设置为false
                fileElementId: 'file', // 上传文件的id、name属性名
                dataType: 'text', //返回值类型，一般设置为json、application/json
                elementIds: elementIds, //传递参数到服务器
                success: function(data, status){  
                    alert("上传成功");
                },
                error: function(data, status, e){ 
                    alert(e);
                }
            });
        }

3.写jsp上传jsp代码

<form id ="importExcel" action="importSemzzTongjiExcel.action" method="post" enctype="multipart/form-data">
                 <input type="file" name ="file" id ="file"> 
                 <input type="button" value="上传excel" onclick="ajaxFileUpload()">
                </form>

4.对应的action代码

@Value("#{config['winFileUrl']}")
    private String winFileUrl;
    @Value("#{config['linFileUrl']}")
    private String linFileUrl;

    
    /**
     * 
     * @param excelFileName
     * @param month
     * @throws Exception
     */
    @RequestMapping("importSemzzTongjiExcel")
    public String importSemzzTongjiExcel(String month,@RequestParam MultipartFile file) throws Exception{
        if(month == null){
            month =CalendarUtil.getShotDateToString(CalendarUtil.getLastDateOfMonth(new Date()));
        }
        System.out.println(System.getProperties().getProperty("os.name"));
        String fileUrl ="";
        
        try {
            String sysName =System.getProperties().getProperty("os.name");
            if(sysName.startsWith("Windows")){
                fileUrl =winFileUrl+file.getOriginalFilename();
            }else{
                fileUrl=linFileUrl+file.getOriginalFilename();
            }
            file.transferTo(new File(fileUrl));
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }  
        List<Map<String,Object>> list =service.getsemzzList(month,null,null);
         InputStream input;
        try {
            input = new FileInputStream(fileUrl);
             POIFSFileSystem fs = new POIFSFileSystem(input);
             HSSFWorkbook wb = new HSSFWorkbook(fs);
             HSSFSheet sheet = wb.getSheetAt(0); 
             int rowNum = sheet.getLastRowNum();
            for(int i=1;i<=rowNum;i++){
           HSSFRow row=  sheet.getRow(i);
           HSSFCell cell1 =row.getCell(0);
           String userName =null;
           if(cell1!=null){
               userName =cell1.getStringCellValue();
               for (Map<String,Object> map : list) {
                   String userNameSql =(String) map.get("username");
                   if(userName.equals(userNameSql)){
                       Double xindanaccountstc = Double.parseDouble(map.get("xindanaccountstc").toString());
                       Double xudanaccountstc = (Double.parseDouble(map.get("xudanaccountstc").toString()));
                       Double tichengheji =xindanaccountstc+xudanaccountstc;
                       String gangwei = null;
                       String position = null;
                       Double dyrealjixiaoxishu =0D;
                    HSSFCell cell2 =row.getCell(1);
                 if(cell2!=null){
                   gangwei=cell2.getStringCellValue();
                 }
                 HSSFCell cell3 =row.getCell(2);
                 if(cell3!=null){
                   position=cell3.getStringCellValue();
                 }
                 HSSFCell cell4 =row.getCell(3);
                 if(cell4!=null){
                   dyrealjixiaoxishu =cell4.getNumericCellValue();
                 }
                 service.updateData(userNameSql, month, gangwei, position, dyrealjixiaoxishu,tichengheji);
                 break;
                   }
               }
           }
          }
             // Iterate over each row in the sheet
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("end...");
        return null;
    }