csv到xsl java，有一列有一些貨幣（如$ 400）

Question

我想用csv轉換成xsl。一切工作正常，但在CSV文件中有一列有一些貨幣（如$ 400）。 當這些貨幣值寫入XLS文件時，它顯示綠色標誌，我們必須單擊並在Excel中將其數據類型從字符串更改爲數字以擺脫綠色標誌。

現在要做的是什麼是想檢查在一個單元格中，如果起始字符是'$'，那麼我將setCelltype設置爲數字，但是要在代碼中實現它？

請幫助新的脫穎而出和Java太：P

//all imports are proper 
public class Convert_CSV_XLS { 
    public static void main(String[] args) throws Exception{ 

     /* Step -1 : Read input CSV file in Java */ 
     String inputCSVFile = "csv_2_xls.csv"; 
     CSVReader reader = new CSVReader(new FileReader(inputCSVFile)); 
     /* Variables to loop through the CSV File */ 
     String [] nextLine; /* for every line in the file */    
     int lnNum = 0; /* line number */ 
     /* Step -2 : Define POI Spreadsheet objects */   
     HSSFWorkbook new_workbook = new HSSFWorkbook(); //create a blank workbook object 
     HSSFSheet sheet = new_workbook.createSheet("CSV2XLS"); //create a worksheet with caption score_details 
     /* Step -3: Define logical Map to consume CSV file data into excel */ 
     Map<String, Object[]> excel_data = new HashMap<String, Object[]>(); //create a map and define data 
     /* Step -4: Populate data into logical Map */ 
     while ((nextLine = reader.readNext()) != null) { 
      lnNum++;       
      excel_data.put(Integer.toString(lnNum), new Object[] {nextLine[0],nextLine[1]});      
     } 
     /* Step -5: Create Excel Data from the map using POI */ 
     Set<String> keyset = excel_data.keySet(); 
     int rownum = 0; 
     for (String key : keyset) { //loop through the data and add them to the cell 
      Row row = sheet.createRow(rownum++); 
      Object [] objArr = excel_data.get(key); 
      int cellnum = 0; 
      for (Object obj : objArr) { 
       Cell cell = row.createCell(cellnum++); 

       // Now here i want to check if first char of the value in cell is '$' or not. 
       if(obj instanceof Double) 
        cell.setCellValue((Double)obj); 
       else 
        cell.setCellValue((String)obj); 
      } 
     } 
     /* Write XLS converted CSV file to the output file */ 
     FileOutputStream output_file = new FileOutputStream(new File("CSV2XLS.xls")); //create XLS file 
     new_workbook.write(output_file);//write converted XLS file to output stream 
     output_file.close(); //close the file 
    } 
    } 

Answer 1

你應該能夠檢查，看是否有String開始與$或不漂亮容易。對於設定的細胞類型，它應該是這樣的，如果你想Numeric：

cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC); 

Answer 2

解決。

二手DataFormatter - https://poi.apache.org/apidocs/org/apache/poi/ss/usermodel/DataFormatter.html

細胞cell.setCellValue（Double.parseDouble（STR））; CellStyle cellStyle = wb.createCellStyle（）; cellStyle.setDataFormat（HSSFDataFormat.getBuiltinFormat（「£＃，## 0; [Red] - £＃，## 0」））; cell.setCellStyle（cellStyle）;