GUI를 사용하여 파일 저장 및 추가하기 JAVA

Question

나는이 프로그램을 작업 중이며 (아래 코드 참조) GUI에 입력 된 데이터를 텍스트 파일로 저장할 수 있습니다. 다음 단추를 클릭하여 GUI 텍스트 필드를 지우고 다른 직원을 입력하면이 파일은 이전 직원과 현재 직원의 데이터를 저장하지 않습니다. 내 목표는 직원을 입력 한 다음 다른 직원을 입력 한 다음 입력 된 모든 직원의 목록을 인쇄하는 것입니다. 프로그램에 무슨 문제가 있습니까 ??? 왜 추가하지 않는거야?

좋아요. person, employee, gui 및 primary 용 클래스가 있으므로 클래스의 순서대로 코드를 붙여 넣습니다.

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); 

} 
    } 

Answer 1

내가 귀하의 게시물에서 찾을 수있는 유일한 IO 관련 코드는

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

그러나이 save.txt에 아무것도 저장할 수 없습니다입니다. 이것은 오히려 무언가를 읽고 콘솔 출력으로 출력 할 것입니다 ... 문자열을 주소로 저장하려면 다음을 사용할 수 있습니다.

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(); 
}