如何讓代碼以.csv格式顯示正確的行和列

Question

我有以下代碼。問題在於它以列的形式重複顯示。 這裏是我的excel文件圖片：

我想一次爲單次執行的記錄是從柱填充柱是從下一行開始。

這裏是我的代碼：

public class panel extends OrderSystem { 

       final JTextField items; 
       final JTextField number; 
       final JTextField cost; 
      final JTextField amount; 




      public panel() { 

       JFrame myFrame = new JFrame();  
       myFrame.setLayout(new FlowLayout()); 

       myFrame.setTitle("GUI Demo - ISTE-121"); 
       myFrame.pack(); 
       myFrame.setLocation(600,300); 
       myFrame.setSize(400,200); 
       myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
       myFrame.setVisible(true); 

      JPanel order = new JPanel(); 
      order.setLayout(new GridLayout(5,5,2,2)); 

      myFrame.add(order, BorderLayout.CENTER); 

      order.add(new JLabel("Item no:", SwingConstants.RIGHT)); 
      order.add(items = new JTextField(3)); 

      order.add(new JLabel("Number of:", SwingConstants.RIGHT)); 
      order.add(number = new JTextField(3)); 

      order.add(new JLabel("Cost", SwingConstants.RIGHT)); 
      order.add(cost = new JTextField(3)); 

      order.add(new JLabel("Amount owed:", SwingConstants.RIGHT)); 
      order.add(amount = new JTextField(10)); 
      amount.setEditable(false); 


      JPanel buttons = new JPanel(); 
      buttons.setLayout(new GridLayout(1,1,2,2)); 

     myFrame.add(buttons ,BorderLayout.CENTER); 

      JButton calculate; 
      buttons.add(calculate=new JButton("Calculate")); 

      calculate.addActionListener(new ActionListener() 
      { 
      @Override 
      public void actionPerformed(ActionEvent e) 
      { 
       // TODO Auto-generated method stub 
       double cost1 = new Double(cost.getText().trim()).doubleValue(); 
       double number1 = new Double(number.getText().trim()).doubleValue(); 

       double result = cost1*number1; 
       amount.setText(String.valueOf(result)); 

      } 

      }); 

      JButton save; 
      buttons.add(save = new JButton("Save")); 

      save.addActionListener(new ActionListener() 
     { 
      @Override 
      public void actionPerformed(ActionEvent e) { 



       try{ 

         // Assume default encoding. 
         FileWriter fw = new FileWriter("data.csv",true); 
         BufferedWriter bufferedWriter = new BufferedWriter(fw); 



         bufferedWriter.newLine(); 
         bufferedWriter.write(','); 

         bufferedWriter.write("\"ItemCode:\""+"\""+ items.getText() +"\""+","); 
         bufferedWriter.write("\"ItemNumber:\""+"\""+number.getText()+"\""+","); 
         bufferedWriter.write("\"ItemCost:\""+"\""+cost.getText()+"\""+","); 
         bufferedWriter.write("\"AmountOwned:\""+"\""+amount.getText()+"\""+","); 
         bufferedWriter.newLine(); 

         bufferedWriter.close(); 


       } 

        catch(IOException ex) { 
         System.out.println(
          "Error writing to file '" 
          + "'"); 
         // Or we could just do this: 
         // ex.printStackTrace(); 
        } 





      }} 
      ); 



      JButton clear; 
      buttons.add(clear=new JButton("Clear")); 

      clear.addActionListener(new ActionListener() { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       // TODO Auto-generated method stub 
       items.setText(null); 
       number.setText(null); 
       cost.setText(null); 
       amount.setText(null); 
      }}); 

      JButton exit; 
      buttons.add(exit= new JButton("Exit")); 

      exit.addActionListener(new ActionListener() 
      { 

     @Override 
     public void actionPerformed(ActionEvent e) 
     { 
      // TODO Auto-generated method stub 
      System.exit(0); 

     } 


      }); 



      JPanel buttons2 = new JPanel(); 
       buttons2.setLayout(new GridLayout(1,1,2,2)); 

      myFrame.add(buttons2 ,BorderLayout.SOUTH); 

       JButton load; 
       buttons2.add(calculate=new JButton("Load")); 

       calculate.addActionListener(new ActionListener() 
       { 
       @Override 
       public void actionPerformed(ActionEvent e) 
       { 
        // TODO Auto-generated method stub 





       } 

       }); 




        JButton next; 
        buttons2.add(calculate=new JButton("Next>")); 

        calculate.addActionListener(new ActionListener() 
        { 
        @Override 
        public void actionPerformed(ActionEvent e) 
        { 
         // TODO Auto-generated method stub 





        } 

        }); 




         JButton prev; 
         buttons2.add(calculate=new JButton("<Prev")); 

         calculate.addActionListener(new ActionListener() 
         { 
         @Override 
         public void actionPerformed(ActionEvent e) 
         { 
          // TODO Auto-generated method stub 





         } 

         }); 

    } 

}

Answer 1

Android: How to write newline in CSV file?

這裏寫的是你可以使用write.print（ 「\ r \ n」），所以使用「\ r \ n」來作出新線

，而不需要編寫

bufferedWriter.newLine(); 

你寫

bufferedWriter.write("\r\n"); 

或

bufferedWriter.write("\r"); 
bufferedWriter.newLine(); 

因爲bufferedWriter.newLine（）;據我所知，只會將「\ n」寫入您的文件。 希望它會幫助你