使用GUI JAVA保存和附加文件

时间：2011-11-19 18:31:24

标签： java io

好的我一直在研究这个程序（参见下面的代码），我可以将输入GUI的数据保存到文本文件中。当我单击下一个按钮清除GUI文本字段以输入另一个员工时，该文件不会保存先前和当前员工的数据。我的目标是输入一名员工，然后输入另一名员工等，然后打印出与其输入一起保存的所有员工的列表。程序有什么问题???为什么不附加？

好的我有人，员工，gui和primary的课程将按照课程顺序粘贴代码。 

import java.io.Serializable;


public class person implements Serializable{
   /**
 * 
 */
private static final long serialVersionUID = 1L;
public String Social, FirstName, LastName, MiddleName, Address;

   public person(){

   }
   public person(String soc){       
       this(soc,null);
   }
   public person(String soc, String fn){       
       this(soc,fn,null);
   }
   public person(String soc,String fn, String ln){       
       this(soc,fn,ln,null);
   }
   public person(String soc,String fn,String ln,String mn){       
       this(soc,fn,ln,mn,null);
   }
   public person(String soc,String fn,String ln,String mn,String add){       
        setData(soc,fn, ln, mn, add);
   }

   public void setData(String soc,String fn,String ln,String mn,String add){
        setSocial (soc);
        setFirstName (fn);
        setLastName (ln);
        setMiddleName (mn);
        setAddress (add);
   }

   public person(person obj)
    {
        Social = obj.Social;
        FirstName = obj.FirstName;
        MiddleName = obj.MiddleName;
        LastName = obj.LastName;
        Address = obj.Address;
    }

   public void makeCopy(person obj)
    {
        Social = obj.Social;
        FirstName = obj.FirstName;
        MiddleName = obj.MiddleName;
        LastName = obj.LastName;
        Address = obj.Address;
    }

    public person getCopy()
    {
        person obj = new person(this.Social);
        obj.FirstName = FirstName;
        obj.MiddleName = MiddleName;
        obj.LastName = LastName;
        obj.Address = Address;
        return obj;
    }


   public void input(){    
       System.out.println("Please enter first name");
      // FirstName = entry.nextLine();
   }

    public void input2(){
       System.out.println("Please enter middle name");
      // MiddleName = entry.nextLine();
    }

    public void input3(){
           System.out.println("Please enter last name");
           //LastName = entry.nextLine();
    }

    public void input4(){
       System.out.println("Please enter social secuirty number");
      // Social = entry.nextLine(); 
    }

    public void input5(){
       System.out.println("Please enter your address");
      // Address = entry.nextLine();
    }   

   public void setSocial(String soc){
       Social = soc;
   }
   public void setFirstName(String fn){
       FirstName = fn;
   }
   public void setLastName(String ln){
       LastName = ln;
   }
   public void setMiddleName(String mn){
       MiddleName = mn;
   }
   public void setAddress(String add){
       this.Address = add;
   }


    public String getSocial(){
        return Social;
    }
    public String getFirstName(){
        return FirstName;
    }
    public String getLastName(){
        return LastName;
    }
    public String getMiddleName(){
        return MiddleName;
    }
    public String getAddress(){
        return Address;
    }

   public void personData(){
   String data = getFirstName()+" "+ getMiddleName()+" "+ getLastName()+ " "
       +getSocial()+ " " +getAddress();
   System.out.println(data);
   }


}

import java.io.Serializable;
import java.util.Formatter;

 public class employee extends person implements Serializable {

private static final long serialVersionUID = 1L;
private String EmployeeId;
double Rate;
double Hours;
double Gross;
private String Department;

public employee()
{
    super();
    EmployeeId = "0";
    Rate = 0.0;
    Hours = 0.0;
    Gross = 0.0;
    Department = "";
    setSocial("");
    setLastName("");
    setMiddleName("");
    setFirstName("");
    setAddress("");
}

public employee(String id)
{
    EmployeeId = id;
    Rate = 0.0;
    Hours = 0.0;
    Gross = 0.0;
    Department = "";
    setSocial("");
    setLastName("");
    setMiddleName("");
    setFirstName("");
    setAddress("");
}

public employee(String id, String last)
{
    EmployeeId = id;
    Rate = 0.0;
    Hours = 0.0;
    Gross = 0.0;
    setSocial("");
    setLastName(last);
    setMiddleName("");
    setFirstName("");
    setAddress("");
}

public employee(String id, String last, String Department)
{
    EmployeeId = id;
    Rate = 0.0;
    Hours = 0.0;
    Gross = 0.0;
    this.Department = Department;
    setSocial("");
    setLastName(last);
    setMiddleName("");
    setFirstName("");
    setAddress("");
}

public employee(String id, String last, double rate, double hours)
{
    EmployeeId = id;
    this.Rate = rate;
    this.Hours = hours;
    Gross = rate * hours;
    Department = "";
    setSocial("");
    setLastName(last);
    setMiddleName("");
    setFirstName("");
    setAddress("");
}

public employee(String id, String last, String Department, double rate, double 
    hours)
{
    EmployeeId = id;
    this.Rate = rate;
    this.Hours = hours;
    Gross = rate * hours;
    this.Department = Department;
    setSocial("");
    setLastName(last);
    setMiddleName("");
    setFirstName("");
    setAddress("");
}

public employee(employee obj)
{
    EmployeeId = obj.EmployeeId;
    Rate = obj.Rate;
    Hours = obj.Hours;
    Gross = obj.Gross;
    Department = obj.Department;
    setSocial(obj.getSocial());
    setLastName(obj.getLastName());
    setMiddleName(obj.getMiddleName());
    setFirstName(obj.getFirstName());
    setAddress(obj.getAddress());
}

public void makeCopy(employee obj)
{
    EmployeeId = obj.EmployeeId;
    Rate = obj.Rate;
    Hours = obj.Hours;
    Gross = obj.Gross;
    Department = obj.Department;
    setSocial(obj.getSocial());
    setLastName(obj.getLastName());
    setMiddleName(obj.getMiddleName());
    setFirstName(obj.getFirstName());
    setAddress(obj.getAddress());
}

@Override
public employee getCopy()
{
    employee obj = new employee();
    obj.EmployeeId = EmployeeId;
    obj.Rate = Rate;
    obj.Hours = Hours;
    obj.Gross = Gross;
    obj.Department = Department;
    obj.setSocial(getSocial());
    obj.setLastName(getLastName());
    obj.setMiddleName(getMiddleName());
    obj.setFirstName(getFirstName());
    obj.setAddress(getAddress());
    return obj;
}

/**
 *
 * @return
 */
public void setEmployeeID(String id)
{
    EmployeeId = id;
}
public String getID()
{
    return EmployeeId;
}

public double getRate()
{
    return Rate;
}

public double getHours()
{
    return Hours;
}

public double getGross()
{
    return Gross;
}

public String getDepartment()
{
    return Department;
}

public void setRate(double rate)
{
    this.Rate = rate;
    this.Gross = rate * Hours;

}

public void setHours(double hours)
{
    this.Hours = hours;
    this.Gross = Rate * hours;
}

public void setGross(double gross)
    {

        this.Gross = Rate * Hours;
    }

public void setDepartment(String Department)
{
    this.Department = Department;
}

public double calculateGross()
{
    Gross = Rate * Hours;
    return Gross;
}

public boolean equals(employee test)
{
    return EmployeeId.equals(test.EmployeeId);
}



@Override
public String toString()
{
    return ("employee ID: " + getID() + "\nSocial: " + getSocial() + "\nName: "
     + getLastName() + ", " + getFirstName() + " " +
            getMiddleName() + "\nHome Address: " + getAddress() + 
     "\nDepartment: " + getDepartment() + "\nRate = " +
            String.format("%,.2f, Rate = %,.2f, Gross = %,.2f\n", 
    getRate(), getHours(),getGross()));
}


public int IsBefore(employee obj, String sortByWhat) {
    if (sortByWhat.equalsIgnoreCase("firstname"))
    {
        int t = this.getFirstName().compareTo(obj.getFirstName());
        return ((t > 0) ? 1 : ((t<0) ? -1 : 0));
    }
    else if (sortByWhat.equalsIgnoreCase("lastname"))
    {
        int t = this.getLastName().compareTo(obj.getLastName());
        return ((t > 0) ? 1 : ((t<0) ? -1 : 0));
    }
    else if (sortByWhat.equalsIgnoreCase("lastnamefirstname"))
    {
        int t = getLastName().compareTo(obj.getLastName());
        if (t == 0)
        {
            t = getFirstName().compareTo(obj.getFirstName());
            return ((t > 0) ? 1 : ((t<0) ? -1 : 0));
        }
        return ((t > 0) ? 1 : ((t<0) ? -1 : 0));
    }
    else if (sortByWhat.equalsIgnoreCase("rate"))
    {
        double t = getRate() - obj.getRate();
        return ((t > 0) ? 1 : ((t<0) ? -1 : 0));
    }
    else if (sortByWhat.equalsIgnoreCase("gross"))
    {
        double t = getGross() - obj.getGross();
        return ((t > 0) ? 1 : ((t<0) ? -1 : 0));
    }
    else
        return 0;
}

    }

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.GridLayout;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Formatter;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JOptionPane;

 public class gui extends JFrame {

/**
 * 
 */ 
private static final long serialVersionUID = 1L;
private JLabel idLabel;
private JLabel socLabel;
private JLabel fNameLabel;
private JLabel mNameLabel;
private JLabel lNameLabel;
private JLabel AddLabel;
private JLabel deptLabel;
private JLabel rateLabel;
private JLabel hoursLabel;
private JTextField idField;
private JTextField socField;
private JTextField fNameField;
private JTextField mNameField;
private JTextField lNameField;
private JTextField AddField;
private JTextField deptField;
private JTextField rateField;
private JTextField hoursField;
private JButton btnGross;
private JButton btnExit;
private JButton btnDelete;
private JButton btnDisplay;
private JButton btnSave;
private JButton btnNext;
private double storegross;
private thehandler handler;
private gui theApp;
double Hours, Rate;
private Formatter g;



public gui(){
    super ("this is the title");
    setLayout(new GridLayout(0,2));

    fNameLabel= new JLabel("Please enter your first name");
    add( fNameLabel );
    fNameField = new JTextField(10);
    add (fNameField);

    mNameLabel = new JLabel("Please enter your middle name");
    add( mNameLabel );
    mNameField = new JTextField(10);
    add (mNameField);

    lNameLabel = new JLabel ("Please enter your last name");
    add( lNameLabel );
    lNameField = new JTextField (10);
    add (lNameField);

    socLabel = new JLabel("Please enter Social security number");
    add(socLabel);
    socField = new JTextField(10);
    add (socField);

    AddLabel = new JLabel("Please enter your address") ;
    add(AddLabel);
    AddField = new JTextField(10);
    add (AddField);

    deptLabel = new JLabel("Please enter your department") ;
    add( deptLabel );
    deptField= new JTextField(10);
    add (deptField);

    idLabel = new JLabel("Please enter your ID number");
    add (idLabel);  
    idField = new JTextField(10);
    add (idField);

    hoursLabel = new JLabel("Please enter your hours") ;
    add( hoursLabel );
    hoursField= new JTextField(10);
    add (hoursField);

    rateLabel = new JLabel("Please enter your rate") ;
    add(rateLabel  );
    rateField = new JTextField(10);
    add (rateField);

    btnGross = new JButton("Gross");
    add(btnGross);
    btnDisplay = new JButton("Display Employee list");
    add(btnDisplay);
    btnSave = new JButton("Save Employee");
    add(btnSave);
    btnNext = new JButton("Next");
    add(btnNext);
    btnExit = new JButton("Exit");
    add(btnExit);
    btnDelete = new JButton("Delete employee");
    add(btnDelete);


    thehandler handler = new thehandler();

    btnGross.addActionListener(handler);
    btnDisplay.addActionListener(handler);
    btnSave.addActionListener(handler);
    btnNext.addActionListener(handler);
    btnDelete.addActionListener(handler);
    btnExit.addActionListener(handler);
    theApp = this;
}

public gui(employee emp){
    super ("this is the title");
    setLayout(new GridLayout(0,2));

    fNameLabel= new JLabel("Please enter your first name");
    add( fNameLabel );
    fNameField = new JTextField(10);
    fNameField.setText(emp.getFirstName());
    add (fNameField);

    mNameLabel = new JLabel("Please enter your middle name");
    add( mNameLabel );
    mNameField = new JTextField(emp.getMiddleName());
    add (mNameField);

    lNameLabel = new JLabel ("Please enter your last name");
    add( lNameLabel );
    lNameField = new JTextField (emp.getLastName());
    add (lNameField);

    socLabel = new JLabel("Please enter Social security number");
    add(socLabel);
    socField = new JTextField(emp.getSocial());
    add (socField);

    AddLabel = new JLabel("Please enter your address") ;
    add(AddLabel);
    AddField = new JTextField(emp.getAddress());
    add (AddField);

    deptLabel = new JLabel("Please enter your department") ;
    add( deptLabel );
    deptField= new JTextField(emp.getAddress());
    add (deptField);

    idLabel = new JLabel("Please enter your ID number");
    add (idLabel);  
    idField = new JTextField(10);
    add (idField);

    hoursLabel = new JLabel("Please enter your hours") ;
    add( hoursLabel );
    hoursField= new JTextField(String.format("%7.2f", emp.getHours()));
    add (hoursField);

    rateLabel = new JLabel("Please enter your rate") ;
    add(rateLabel  );
    rateField= new JTextField(String.format("%7.2f", emp.getRate()));
    add (rateField);


    btnGross = new JButton("Gross");
    add(btnGross);
    btnDisplay = new JButton("Display Employee list");
    add(btnDisplay);
    btnSave = new JButton("Save Employee");
    add(btnSave);
    btnNext = new JButton("Next");
    add(btnNext);
    btnExit = new JButton("Exit");
    add(btnExit);
    btnDelete = new JButton("Delete employee");
    add(btnDelete);


    thehandler handler = new thehandler();
    btnGross.addActionListener(handler);
    btnDisplay.addActionListener(handler);
    btnSave.addActionListener(handler);
    btnNext.addActionListener(handler);
    btnDelete.addActionListener(handler);
    btnExit.addActionListener(handler);


    theApp = this;
}

private class thehandler implements ActionListener{

    public void actionPerformed(ActionEvent e){


        if (e.getSource() == btnSave)
        {
            employee x = new employee();
            x.setSocial(socField.getText());
            x.setFirstName(fNameField.getText());
            x.setMiddleName(mNameField.getText());
            x.setLastName(lNameField.getText());
            x.setAddress(AddField.getText());
            x.setDepartment(deptField.getText());
            x.setEmployeeID(idField.getText());

            try
            {
                Hours = Double.parseDouble(hoursField.getText());
                Rate = Double.parseDouble(rateField.getText());
                x.setHours(Hours);
                x.setRate(Rate);                    
                FileOutputStream fos = new 
  FileOutputStream("C:/CSCI/save.txt",true);
                ObjectOutputStream oos = new 
  ObjectOutputStream(fos);
                oos.writeObject(x);
                oos.close();

            }
            catch(NumberFormatException ex)
            {
                JOptionPane.showMessageDialog(null, 
  ex.getMessage().toString());
                return;
            }
            catch(IOException ex1)
            {
                JOptionPane.showMessageDialog(null, 
  ex1.getMessage().toString());
                return;
            }

            catch(Exception ex2)
            {
                JOptionPane.showMessageDialog(null, 
  ex2.getMessage().toString());
                return;
            }
            JOptionPane.showMessageDialog(null, "Saved");

        }

        else if  (e.getSource() == btnGross)
        {
                Hours = Double.parseDouble(hoursField.getText());
                Rate = Double.parseDouble(rateField.getText());
                storegross = (Hours * Rate);

                JOptionPane.showMessageDialog(null, "The gross for
   this employee is " + storegross);

        }

        else if  (e.getSource()==btnNext)
        {
            try
            {
                idField.setText("");
                socField.setText("");
                fNameField.setText("");
                mNameField.setText("");
                lNameField.setText("");
                AddField.setText("");
                deptField.setText("");
                rateField.setText(String.format("%7.2f", 0.0));
                hoursField.setText(String.format("%7.2f", 0.0));
                theApp.repaint();

            }
            catch (Exception ex3)
            {
                JOptionPane.showMessageDialog(null, 
   ex3.getMessage().toString());
                return;
            }

        }

        else if  (e.getSource()==btnDisplay)
        {

            try {
                  FileInputStream fis = new 
   FileInputStream("C:/CSCI/save.txt");
                  ObjectInputStream ois = new 
   ObjectInputStream(fis);
                  System.out.print(ois.readObject());
                  ois.close();
            }
            catch(ClassNotFoundException ex)
            {
            } 
            catch (IOException ex) 
            {
            }
        }
        else if (e.getSource() ==btnExit)
        {
                System.exit(0);
        }

    }

}
    }

  import java.io.*;

  import javax.swing.JFrame;


  public class primary {

/**
 * @param args
 */
public static void main(String[] args) throws IOException {
    // TODO Auto-generated method stub


    gui go = new gui();
    go.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    go.setSize(465,390);
    go.setVisible(true);
    go.setLocationRelativeTo(null);

}
   }

1 个答案:

答案 0 :(得分：1)

我在帖子中找到的唯一与IO相关的代码是

FileInputStream fis = new 
FileInputStream("C:/CSCI/save.txt");
ObjectInputStream ois = new 
ObjectInputStream(fis);
System.out.print(ois.readObject());
ois.close();

然而，这无法将任何内容保存到save.txt。这将是读取内容并将其打印到控制台输出...要将字符串保存到地址，您可以使用：

public void save(String text, String address) {
    FileWriter writer = null;
    try {
        writer = new FileWriter(address);
        writer.write(text);
    } catch (IOException ioe) {
        System.out.println(ioe.getMessage());
    }
    if (writer != null) writer.close();
}
相关问题
最新问题