如何让代码以.csv格式显示正确的行和列

Question

我有以下代码。问题是它在列中背靠背显示。 这是我的excel文件中的图片：

一旦从列到列填充单次执行的记录，我希望它从下一行重新开始。

这是我的代码：

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?

这里写的是你可以使用write.print（“\ r \ n”）所以使用“\ r \ n”来创建一个新行

而不是写

bufferedWriter.newLine();

你写了

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

或

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

因为bufferedWriter.newLine（）;据我所知，只会在文件中写入“\ n”。 希望它会帮助你