我的第一个Swing程序

利用反射机制获得JavaBean的属性,然后生成一个XML文件.

//XmlFrame.java

package xmlgen.gui;

import java.awt.*;

import javax.swing.*;

public class XmlFrame extends JFrame{

public XmlFrame(){

this.setTitle("Xml Generator");

Toolkit kit=Toolkit.getDefaultToolkit();

Dimension d=kit.getScreenSize();

int width=d.width;

int height=d.height;

this.setLocation((width-800)/2,(height-600)/2);

this.setSize(800,600);

this.setContentPane(new XmlPanel());

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.show();

}

public static void main(String[] args){

new XmlFrame();

}

}

//XmlPanel.java

package xmlgen.gui;

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

import javax.swing.event.*;

import java.util.*;

import xmlgen.core.*;

public class XmlPanel extends JPanel{

private JPanel midPane,classPane,propertyPane,elementPane;

private JPanel xmlPane;

private JTextArea xmlContent;

private JTextField txtPackage,txtClass,txtRoot,txtElement,txtProperty;

private JLabel lblPackage,lblClass,lblRoot,lblElement;

private JButton btnClass,btnDelPro,btnAddElement,btnDelElement,btnGen;

private JList lstClass,lstXml;

private DefaultListModel lmClass,lmXml;

private void init(){

this.setLayout(new BorderLayout());

classPane=new JPanel();

classPane.setBorder(BorderFactory.createCompoundBorder(

BorderFactory.createTitledBorder("类全名"),

BorderFactory.createEmptyBorder(5,5,5,5)));

this.lblPackage=new JLabel("类包名:");

this.lblClass=new JLabel("类名:");

this.txtPackage=new JTextField(20);

this.txtClass=new JTextField(20);

this.btnClass=new JButton("获得属性");

this.btnClass.setEnabled(false);

this.btnClass.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

String fullName=txtPackage.getText().trim()+"."+txtClass.getText().trim();

Class c=null;

xmlContent.setText("");

lmClass.clear();

try{

c=Class.forName(fullName);

}

catch(ClassNotFoundException ex){

xmlContent.setText("找不到指定的类，请确保环境变量设置正确");

return;

}

java.util.List list=Generator.getProperties(c);

for(int i=0;i<list.size();i++)

lmClass.addElement(list.get(i));

if(lmClass.size()==0)

xmlContent.setText("找不到任何属性");

}

}

);

this.txtClass.getDocument().addDocumentListener(

new AddTextListener(this.btnClass));

classPane.add(this.lblPackage);

classPane.add(this.txtPackage);

classPane.add(this.lblClass);

classPane.add(this.txtClass);

classPane.add(this.btnClass);

/*******************************************************************

*/

propertyPane=new JPanel(new BorderLayout());

propertyPane.setBorder(BorderFactory.createCompoundBorder(

BorderFactory.createTitledBorder("Bean 属性"),

BorderFactory.createEmptyBorder(5,5,5,5)));

this.lmClass =new DefaultListModel();

lmClass.addElement("这里是Bean的属性");

lmClass.addElement("点击上面的按钮可以生成");

lmClass.addElement("右边是XML中的属性");

lmClass.addElement("可以删除不必要的");

this.lstClass=new JList(this.lmClass);

this.lstClass.addListSelectionListener(new ListSelectionListener(){

public void valueChanged(ListSelectionEvent e) {

if (e.getValueIsAdjusting() == false) {

if (XmlPanel.this.lstClass.getSelectedIndex() == -1) {

//No selection, disable fire button.

XmlPanel.this.btnDelPro.setEnabled(false);

} else {

//Selection, enable the fire button.

XmlPanel.this.btnDelPro.setEnabled(true);

}

}

}

}

);

JScrollPane sp1=new JScrollPane(this.lstClass);

this.btnDelPro=new JButton("删除属性");

this.btnDelPro.setEnabled(false);

this.btnDelPro.addActionListener(new DelPropertyListener());

JPanel p1=new JPanel();

p1.add(this.btnDelPro);

propertyPane.add(sp1,BorderLayout.CENTER);

propertyPane.add(p1,BorderLayout.SOUTH);

/***************************************************************

*/

elementPane=new JPanel(new BorderLayout());

elementPane.setBorder(BorderFactory.createCompoundBorder(

BorderFactory.createTitledBorder("XML 元素属性"),

BorderFactory.createEmptyBorder(5,5,5,5)));

this.lmXml=new DefaultListModel();

this.lstXml=new JList(this.lmXml);

this.lstXml.addListSelectionListener(new ListSelectionListener(){

public void valueChanged(ListSelectionEvent e) {

if (e.getValueIsAdjusting() == false) {

if (XmlPanel.this.lstXml.getSelectedIndex() == -1) {

//No selection, disable fire button.

XmlPanel.this.btnDelElement.setEnabled(false);

} else {

//Selection, enable the fire button.

XmlPanel.this.btnDelElement.setEnabled(true);

}

}

}

}

);

JScrollPane sp2=new JScrollPane(this.lstXml);

this.btnDelElement=new JButton("删除");

this.btnDelElement.setEnabled(false);

this.btnDelElement.addActionListener(new DelElementListener());

this.txtProperty=new JTextField(15);

this.btnAddElement=new JButton("添加");

this.btnAddElement.setEnabled(false);

this.btnAddElement.addActionListener(new AddElement());

this.txtProperty.getDocument().addDocumentListener(

new AddTextListener(this.btnAddElement));

JPanel p2=new JPanel();

p2.add(this.btnDelElement);

p2.add(this.txtProperty);

p2.add(this.btnAddElement);

elementPane.add(sp2,BorderLayout.CENTER);

elementPane.add(p2,BorderLayout.SOUTH);

/***********************************************

*/

xmlPane=new JPanel(new BorderLayout());

xmlPane.setBorder(BorderFactory.createCompoundBorder(

BorderFactory.createTitledBorder("生成的 XML"),

BorderFactory.createEmptyBorder(5,5,5,5)));

this.xmlContent=new JTextArea(10,60);

this.xmlContent.setEditable(false);

this.lblRoot=new JLabel("根节点:");

this.lblElement=new JLabel("子节点名称:");

this.txtRoot=new JTextField("root",15);

this.txtElement=new JTextField("item",15);

this.btnGen=new JButton("生成XML");

DocumentListener dl=new AddTextListener(this.btnGen);

this.txtRoot.getDocument().addDocumentListener(dl);

this.txtElement.getDocument().addDocumentListener(dl);

this.btnGen.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

String root=txtRoot.getText().trim();

String element=txtElement.getText().trim();

if(root.equals("")) root="root";

if(element.equals("")) element="item";

String[] rows=new String[lmClass.size()];

for(int i=0;i<lmClass.size();i++)

rows[i]=(String)lmClass.getElementAt(i);

String[] pros =new String[lmXml.size()];

for(int i=0;i<lmXml.size();i++)

pros[i]=(String)lmXml.getElementAt(i);

String s=Generator.generateXml(root,element,rows,pros);

xmlContent.setText(s);

}

}

);

JScrollPane sp3=new JScrollPane(this.xmlContent);

JPanel p3=new JPanel();

p3.add(this.lblRoot);

p3.add(this.txtRoot);

p3.add(this.lblElement);

p3.add(this.txtElement);

p3.add(this.btnGen);

xmlPane.add(sp3,BorderLayout.CENTER);

xmlPane.add(p3,BorderLayout.SOUTH);

midPane=new JPanel(new GridLayout(1,1));

midPane.add(propertyPane);

midPane.add(elementPane);

//this.makeSize();

this.add(classPane,BorderLayout.NORTH);

this.add(midPane,BorderLayout.CENTER);

this.add(xmlPane,BorderLayout.SOUTH);

//this.add(new JLabel("Fuck"),BorderLayout.NORTH);

}

public XmlPanel(){

init();

}

class AddElement implements ActionListener{

public void actionPerformed(ActionEvent e){

String name =txtProperty.getText().trim();

//User didn't type in a unique name...

if (name.equals("") || lmXml.contains(name)) {

Toolkit.getDefaultToolkit().beep();

txtProperty.requestFocusInWindow();

txtProperty.selectAll();

return;

}

int index = lstXml.getSelectedIndex(); //get selected index

if (index == -1) { //no selection, so insert at beginning

index = 0;

} else { //add after the selected item

index++;

}

lmXml.insertElementAt(name.trim(), index);

//If we just wanted to add to the end, we'd do this:

//listModel.addElement(employeeName.getText());

//Reset the text field.

txtProperty.requestFocusInWindow();

txtProperty.setText("");

//Select the new item and make it visible.

lstXml.setSelectedIndex(index);

lstXml.ensureIndexIsVisible(index);

}

}

class AddTextListener implements DocumentListener {

private boolean alreadyEnabled = false;

private JButton button;

public AddTextListener(JButton button) {

this.button = button;

}

//Required by DocumentListener.

public void insertUpdate(DocumentEvent e) {

enableButton();

}

//Required by DocumentListener.

public void removeUpdate(DocumentEvent e) {

handleEmptyTextField(e);

}

//Required by DocumentListener.

public void changedUpdate(DocumentEvent e) {

if (!handleEmptyTextField(e)) {

enableButton();

}

}

private void enableButton() {

if (!alreadyEnabled) {

button.setEnabled(true);

}

}

private boolean handleEmptyTextField(DocumentEvent e) {

if (e.getDocument().getLength() <= 0) {

button.setEnabled(false);

alreadyEnabled = false;

return true;

}

return false;

}

}

class DelPropertyListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

//This method can be called only if

//there's a valid selection

//so go ahead and remove whatever's selected.

int[] index = lstClass.getSelectedIndices();

if(index.length==0) return;

for(int i=index.length-1;i>=0;i--)

lmClass.remove(index[i]);

int size = lmClass.getSize();

if (size == 0) { //Nobody's left, disable firing.

btnDelPro.setEnabled(false);

} else { //Select an index.

//removed item in last position

int pos=index[0]-1;

if(pos<0) pos=0;

lstClass.setSelectedIndex(pos);

lstClass.ensureIndexIsVisible(pos);

}

}

}

class DelElementListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

//This method can be called only if

//there's a valid selection

//so go ahead and remove whatever's selected.

int[] index = lstXml.getSelectedIndices();

if(index.length==0) return;

for(int i=index.length-1;i>=0;i--)

lmXml.remove(index[i]);

int size = lmXml.getSize();

if (size == 0) { //Nobody's left, disable firing.

btnDelElement.setEnabled(false);

} else { //Select an index.

//removed item in last position

int pos=index[0]-1;

if(pos<0) pos=0;

lstXml.setSelectedIndex(pos);

lstXml.ensureIndexIsVisible(pos);

}

}

}

}

//Generator.java

package xmlgen.core;

import java.util.*;

import java.lang.reflect.*;

public class Generator{

public static List getProperties(Class c){

Method[] ms=c.getMethods();

List list=new ArrayList();

String mn="";

String pro="";

for(int i=0;i<ms.length;i++){

if(ms[i].getParameterTypes().length!=0) continue;

mn=ms[i].getName();

if(mn.equals("getClass")) continue;

if(mn.startsWith("get")&&mn.length()>3){

pro=mn.substring(3,4).toLowerCase();

if(mn.length()>4) pro+=mn.substring(4);

list.add(pro);

}

}

return list;

}

private static String crln="\r\n";

public static String generateXml(String root,String element,String[] rows,String[] properties){

//

String pro="";

for(int i=0;i<properties.length;i++){

pro+=" "+properties[i]+"=\"\"";

}

String header="<"+element+" name=\"";

StringBuffer sb=new StringBuffer(100);

sb.append('<');

sb.append(root);

sb.append(">");

sb.append(crln);

for(int i=0;i<rows.length;i++){

sb.append('\t');

sb.append(header);

sb.append(rows[i]);

sb.append('\"');

sb.append(pro);

sb.append(" />");

sb.append(crln);

}

sb.append("</");

sb.append(root);

sb.append(">");

return sb.toString();

}

}

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