將數據從JTextField保存爲.csv文件中的列

Question

我已經編碼了以下程序，以便在四個JTextField中獲得用戶輸入並將其保存在.csv文件中。但我得到了不同的行。我想在.csv文件輸出爲逐列

我的代碼如下：

public class panel extends FirstClick { 

       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.SOUTH); 

       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) { 

        // The name of the file to open. 
        String fileName = "temp1.csv";  
        try { 
         // Assume default encoding. 
         FileWriter fileWriter = 
          new FileWriter(fileName, true); 

         // Always wrap FileWriter in BufferedWriter. 
         BufferedWriter bufferedWriter = 
          new BufferedWriter(fileWriter); 

         // Note that write() does not automatically 
         // append a newline character. 
         bufferedWriter.write(items.getText()); 
         bufferedWriter.newLine(); 
         bufferedWriter.write(number.getText()); 
         bufferedWriter.newLine(); 
         bufferedWriter.write(cost.getText()); 
         bufferedWriter.newLine(); 
         bufferedWriter.write(amount.getText()); 
         bufferedWriter.newLine(); 
         // Always close files. 
         bufferedWriter.close(); 
        } 
        catch(IOException ex) { 
         System.out.println(
          "Error writing to file '" 
          + fileName + "'"); 
         // 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); 

      } 
       }); 

     } 
} 



public class FirstClick { 

    public static void main(String args[]) { 
     panel second = new panel(); 


    } // end main 
} 

Answer 1

你寫你的域之間的換行

刪除換行符（）調用和取而代之的是寫';'

bufferedWriter.write(items.getText()); 
bufferedWriter.write(';'); 
bufferedWriter.write(number.getText()); 
bufferedWriter.write(';'); 

Answer 2

試試這個： 複製這種模式在CSV：

「標籤」， 「值」

FileWriter fw = new FileWriter("/CSV/data.csv"); 
BufferedWriter bufferedWriter = new BufferedWriter(fw); 

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

bufferedWriter.close();