sampledesktop13.java

《JBuilder编程技术与实例》（2006 四维科技 人民邮电）赠送代码——图书馆管理系统

        JComponent editor = spinner.getEditor();
        if (editor instanceof JSpinner.DefaultEditor) {
            return ((JSpinner.DefaultEditor)editor).getTextField();
        } else {
            System.err.println("Unexpected editor type: "
                               + spinner.getEditor().getClass()
                               + " isn't a descendant of DefaultEditor");
            return null;
        }
    }

//downloded code ends heres

protected JComponent createEntryFields(String[] labelStrings) {
        JPanel panel = new JPanel(new SpringLayout());

        JLabel[] labels = new JLabel[labelStrings.length];
        JComponent[] fields = new JComponent[labelStrings.length];
        int fieldNum = 0;
      nameField  = new JTextField[labelStrings.length];



         for(int p=0;p<labelStrings.length;p++){
         nameField[p]  = new JTextField(20);
        nameField[p].setColumns(20);
        fields[fieldNum++] = nameField[p];

       nameField[p].setMaximumSize(nameField[p].getPreferredSize());}


        //Associate label/field pairs, add everything,
        //and lay it out.
        for (int i = 0; i < labelStrings.length; i++) {
            labels[i] = new JLabel(labelStrings[i],
                                   JLabel.TRAILING);
            labels[i].setLabelFor(fields[i]);
            labels[i] .setMaximumSize(labels[i] .getPreferredSize());
            panel.add(labels[i]);
            panel.add(fields[i]);

            //Add listeners to each field.
            JTextField tf = null;
            tf = (JTextField)fields[i];
           tf.addActionListener(this);

           //nameField1[i]=nameField[i];



        }
        makeCompactGrid(panel,
                                        labelStrings.length, 2,
                                       6, 6, //init x,y
                                       7, 7);//xpad, ypad
        return panel;
    }


protected void fileopen(String s){
FileInputStream fin = null;
ht.clear();
try{
fin = new FileInputStream(s);
}catch(FileNotFoundException e){

//ignoring missing file
}

try {
if(fin != null){
ht.load(fin);
fin.close();
}
}catch(IOException e) {
System.out.println("Error reading file");
}
}

protected void fileopen1(String s){
FileInputStream fin = null;
try{
fin = new FileInputStream(s);
}catch(FileNotFoundException e){

//ignoring missing file
}

try {
if(fin != null){
ht1.load(fin);
fin.close();
}
}catch(IOException e) {
System.out.println("Error reading file");
}


}

protected void writetofile(String s){
try{

File f=new File(s);
f.delete();
FileOutputStream fout = new FileOutputStream(s,true) ;
ht.store(fout,"Prosun's creation");

fout.close();
}catch(IOException e){}

}

private void save(){

fileopen("srecord.txt");


name=nameField[0].getText();

fname=nameField[1].getText();
number=nameField[2].getText();
add=nameField[3].getText();
qua=nameField[4].getText();
email=nameField[5].getText();
tele=nameField[6].getText();

insertroll(number,"roll.txt");

sums=name+"#"+fname+"#"+add+"#"+qua+"#"+email+"#"+tele;

ht.put(number,sums);



writetofile("srecord.txt");

}
//save upto here


private void Update(){

fileopen("srecord.txt");


name=nameField[0].getText();

fname=nameField[1].getText();
//number=nameField2[2].getText();
number=newSelection;
add=nameField[2].getText();
qua=nameField[3].getText();
email=nameField[4].getText();
tele=nameField[5].getText();

//insertroll(number);

sums=name+"#"+fname+"#"+add+"#"+qua+"#"+email+"#"+tele;

ht.put(number,sums);



writetofile("srecord.txt");

}

public void insertroll(String number,String fn)
	{
		try
		{
DataOutputStream writeFile = new DataOutputStream(new                           FileOutputStream(fn,true));
                            String rec = number+"#";
				writeFile.writeBytes(rec);


			writeFile.close();
		}
		catch(Exception e)
		{
			//e.printStackTrace();
		}
	}




//trying to delete

private void Delete(){

fileopen("srecord.txt");



File f=new File("d:\\prosun\\SWING\\srecord.txt");
f.delete();
try{
FileOutputStream fout = new FileOutputStream("srecord.txt",true);
ht.remove(newSelection);
ht.store(fout,"Prosun's creation");
fout.close();
}catch(IOException e){}


deletefromsuppotedfile("roll.txt",newSelection);


}


//detete upto here

//file copy

 private void filecopy(String a,String b){


int i;
FileInputStream fin;
FileOutputStream fout;


try{

try{
fin =new FileInputStream(a);
}catch(FileNotFoundException e){
System.out.println("FILE NOT FOUND");
return;}

try{
 File f1=new File("d:\\prosun\\SWING\\roll.txt");
                    f1.delete();

fout =new FileOutputStream(b);
}catch(FileNotFoundException e){
System.out.println("OUTPUT FILE NOT FOUND");
return;}
  }

catch(ArrayIndexOutOfBoundsException e){
System.out.println("usage");
return;}

// read characters until EOF

   try{

do{
i=fin.read();
if(i !=-1)
fout.write(i);
//System.out.print((char) i);
}
while(i!=-1);}
catch(IOException e){
System.out.println("file Error");
}
try{
fin.close();
fout.close();

File f2=new File("d:\\prosun\\SWING\\temp1.txt");
                    f2.delete();
}catch(IOException e){}

}
//copy file upto here

protected JComponent createButtons(String s,String t) {
      JPanel panel = new JPanel(new FlowLayout(FlowLayout.TRAILING));

        JButton button = new JButton(s);
        button.addActionListener(this);
        button.setActionCommand(s);
        panel.add(button);

        button = new JButton(t);
        button.addActionListener(this);
        button.setActionCommand(t);
        panel.add(button);

        //Match the SpringLayout's gap, subtracting 5 to make
        //up for the default gap FlowLayout provides.
        panel.setBorder(BorderFactory.createEmptyBorder(0, 0,
                                               10, 10));
        return panel;
    }

/*//adding actionlistener to the buttons
public void actionPerformed(ActionEvent e) {
        if ("clear".equals(e.getActionCommand())) {
System.out.exit(0);

}}*/
//upto here for buttons


protected JComponent createcombo(final int t) {
      JPanel panel = new JPanel(new FlowLayout(FlowLayout.LEADING));
JLabel rol=new JLabel("           Roll No :");


JComboBox petList = new JComboBox();
DataInputStream	readFile;
		try
		{
if(t==1){
		readFile = new DataInputStream(new FileInputStream("irollno.txt"));}
else{
	readFile = new DataInputStream(new FileInputStream("roll.txt"));}
	String rec = readFile.readLine();


			while(rec != null)
			{
				StringTokenizer st = new StringTokenizer(rec,"#");
				while(st.hasMoreTokens())
				{
					//System.out.println(st.nextToken()+"\t");
                                         petList.addItem(st.nextToken());
					rec = readFile.readLine();   //Random Access File
				}
				readFile.close();
			}
		}
		catch(Exception e)
		{
			//e.printStackTrace();
		}

//petList.setSelectedIndex(0);
petList.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent e) {
               JComboBox cb = (JComboBox)e.getSource() ;
                newSelection = (String)cb.getSelectedItem();
                if(t==1){
                 //count1=0;
               reformat1(newSelection);  }

               if(t==0){
               reformat(newSelection);
                wcoboxchange=1;
                }
          }
       });




        panel.add("EAST",rol);
        panel.add(petList);



        //Match the SpringLayout's gap, subtracting 5 to make
        //up for the default gap FlowLayout provides.
        panel.setBorder(BorderFactory.createEmptyBorder(0, 0,
                                               1, 1));
        return panel;
    }




private void reformat1(String s){


stb.setVisible(true);
pix22.setVisible(true);
int n=0;



for( int i=0; i<count; i++ ) {
   listModel.removeElementAt(0);
}
count=0;
         fileopen("issuedbook.txt");
String sums1 = (String) ht.get(s);
String  bdetails1="";
ht.clear();

fileopen("srecord.txt");
String sums2 = (String) ht.get(s);
ht.clear();
StringTokenizer st3 = new StringTokenizer(sums2,"#");
nameField[0].setText(st3.nextToken());

StringTokenizer st = new StringTokenizer(sums1,"#");
				while(st.hasMoreTokens())
				{
                                 n++;
                              String em= st.nextToken();
                       //changing inside

                      if(n==1||n==4||n==7){

               fileopen1("books.txt");
               String rec1= (String) ht1.get(em);
               //nameField[0].setText(em);

               StringTokenizer st1 = new StringTokenizer(rec1,"#");
                 while(st1.hasMoreTokens()){
		bdetails1=bdetails1+st1.nextToken()+"   ";


          }

listModel.addElement(bdetails1);
bdetails1="";
count++;

                   }else{
                    count1=count1;
                    st.nextToken();}
                       //changing innside upto here


				}



}




//change

private void reformat(String s){
FileInputStream fin = null;

try{
fin = new FileInputStream("srecord.txt");
}catch(FileNotFoundException e){

//ignoring missing file
}

try {
if(fin != null){
ht.load(fin);
fin.close();
}
}catch(IOException e) {
System.out.println("Error reading file");
}

String sums = (String) ht.get(s);
int i=0;
StringTokenizer st = new StringTokenizer(sums,"#");
				while(st.hasMoreTokens())
				{
					nameField[i].setText(st.nextToken());
i++;
				}
				//fin.close();
}

//change for compactgrid
public static void makeCompactGrid(Container parent,
                                       int rows, int cols,
                                       int initialX, int initialY,
                                       int xPad, int yPad) {
        SpringLayout layout;
        try {
            layout = (SpringLayout)parent.getLayout();
        } catch (ClassCastException exc) {
            System.err.println("The first argument to makeCompactGrid must use SpringLayout.");
            return;
        }

        //Align all cells in each column and make them the same width.
        Spring x = Spring.constant(initialX);
        for (int c = 0; c < cols; c++) {
            Spring width = Spring.constant(0);
            for (int r = 0; r < rows; r++) {
                width = Spring.max(width,
                                   getConstraintsForCell(r, c, parent, cols).
                                       getWidth());
            }
            for (int r = 0; r < rows; r++) {
                SpringLayout.Constraints constraints =
                        getConstraintsForCell(r, c, parent, cols);
                constraints.setX(x);
                constraints.setWidth(width);
            }
            x = Spring.sum(x, Spring.sum(width, Spring.constant(xPad)));
        }

        //Align all cells in each row and make them the same height.
        Spring y = Spring.constant(initialY);
        for (int r = 0; r < rows; r++) {
            Spring height = Spring.constant(0);
            for (int c = 0; c < cols; c++) {
                height = Spring.max(height,
                                    getConstraintsForCell(r, c, parent, cols).
                                        getHeight());
            }
            for (int c = 0; c < cols; c++) {
                SpringLayout.Constraints constraints =
                        getConstraintsForCell(r, c, parent, cols);
                constraints.setY(y);
                constraints.setHeight(height);
            }
            y = Spring.sum(y, Spring.sum(height, Spring.constant(yPad)));
        }

        //Set the parent's size.
        SpringLayout.Constraints pCons = layout.getConstraints(parent);
        pCons.setConstraint(SpringLayout.SOUTH, y);
        pCons.setConstraint(SpringLayout.EAST, x);
    }


//upto here compactgrid
//change cons
private static SpringLayout.Constraints getConstraintsForCell(
                                                int row, int col,
                                                Container parent,
                                                int cols) {
        SpringLayout layout = (SpringLayout) parent.getLayout();
        Component c = parent.getComponent(row * cols + col);
        return layout.getConstraints(c);
    }

//traints




public static void main(String args[]){
int width=Toolkit.getDefaultToolkit().getScreenSize().width;
       	int height=Toolkit.getDefaultToolkit().getScreenSize().height;
SampleDesktop13 td = new SampleDesktop13("Digital Libary System");
td.setSize(width,height-30);
td.setVisible(true);
}
}