read the specified data import column poi

Uploading ResponseResult public (a MultipartFile file1) throws IOException { 
    String filename = file1.getOriginalFilename (); 
    // read the file stream 1. 
    FileInputStream stream = new FileInputStream ( "C : \\ Users \\ admin \\ Desktop \\ sss \\ "+ filename); 

    // 2. Excel file object obtained by parsing streams poi 
    HSSFWorkbook Workbook = new new HSSFWorkbook (stream); 

    // 3. acquired by the object data table obtained 
    HSSFSheet sheet workbook.getSheetAt = (0); 

    HSSFRow Row = null ; 

     for (int I = 0;! sheet.getRow (I) = null; I ++) { 

        Row = sheet.getRow (I); 
         SystemParam System new new SystemParam = (); 
         for (int J = 0; row.getCell (J !) = null; J ++) { 
    // of System.out.print (row.getCell (J) .toString () + ""); 

         IF (J == 0) {
            // System.out.print(row.getCell(0).getStringCellValue());
          //   System.out.println();
             system.setName(row.getCell(0).getStringCellValue());
         }else if (j==2){
             system.setValues("lv_"+row.getCell(2).getStringCellValue());
            // System.out.print("lv_"+row.getCell(2).getStringCellValue());
            // System.out.println();
             }
          
     }
         System.out.println(system);
     }
    return ResponseResult.okMsg("提交成功");
}