字符串生成器

今天把CDKEY生成器给完善了一下，增加了大写字母，小写字母，数字多选择性生成。

 

 

package randomString;



import java.awt.Toolkit;

import java.awt.datatransfer.Clipboard;

import java.awt.datatransfer.StringSelection;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.Random;



import javax.swing.JButton;

import javax.swing.JCheckBox;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JTextField;



public class RandomString {

    /** 

     * 生成随机字符串

     */  

    private JFrame jFrame;  

    private JPanel jp;  

    private JButton jb;  

    private JTextField tf,tf2;  

    private JLabel  jl;

    private JCheckBox cb1;

    private JCheckBox cb2;

    private JCheckBox cb3;

    private Toolkit toolkit;

    private Clipboard clipboard;		//clipboard.setContents(Transferable contents, ClipboardOwner owner);

    private StringSelection stringSel;	//实现传输 String 所需能力的 Transferable

    private int model;

    public RandomString(){  

        jFrame = new JFrame("字符串生成工具  by:毛兴宇");  

        jp = new JPanel();  

        jb = new JButton("生成(s)");  

        tf = new JTextField(20);  

        tf2 = new JTextField("10",3);  

        jl = new JLabel("位");

        cb1 = new JCheckBox("大写字母",true);

        cb2 = new JCheckBox("小写字母",true);

        cb3 = new JCheckBox("数字",true);

        toolkit = Toolkit.getDefaultToolkit();//获得工具包

        clipboard = toolkit.getSystemClipboard();//获得系统剪贴板

        MyActionListener mal = new MyActionListener();  //监听器定义

        JCheckBox jcb[]={cb1,cb2,cb3};

        

        //UI添加

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

			jp.add(jcb[i]);

		}

        jp.add(tf);  

        jp.add(jb);  

        jp.add(tf2);  

        jp.add(jl);

        jFrame.add(jp);  

        

        //快捷键设置ALT+S

        jb.setMnemonic('s'); 

        

        //添加监听器

        jb.addActionListener(mal);  

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

			jcb[i].addActionListener(mal);

		}

        

        //UI显示 

        jFrame.pack();  

        int w = jFrame.getToolkit().getScreenSize().width;//宽度  

        int h = jFrame.getToolkit().getScreenSize().height;//高度  

        jFrame.setLocation(w/2-301,h/2-36);  

        jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  

        jFrame.setVisible(true);  

    }  

    class MyActionListener implements ActionListener{  

        @Override  

        public void actionPerformed(ActionEvent e) {  

            if(e.getSource().equals(jb)){  

                try {  

                	//获取JCheckBox的值,判断并调用字符串.

                	if(cb1.isSelected() == true && cb2.isSelected() == true && cb3.isSelected() == true)

                	{

                		model = 1;

                	}else if (cb2.isSelected() == true && cb3.isSelected() == true) 

                	{

						model = 2;

					}else if (cb1.isSelected() == true && cb3.isSelected() == true) 

					{

						model = 3;

					}else if (cb1.isSelected() == true && cb2.isSelected() == true)

					{

						model = 4;

					}else if (cb3.isSelected() == true)

					{

						model = 5;

					}else if (cb2.isSelected() == true)

					{

						model = 6;

					}else if (cb1.isSelected() == true)

					{

						model = 7;

					}

                

                	//设置JTextField文字显示,并保存字符串到系统剪贴板.

                    tf.setText(RandomString.getRandomString(Integer.parseInt(tf2.getText()), model));

                    stringSel = new StringSelection(tf.getText());

                    clipboard.setContents(stringSel, null);

                } catch (Exception x) {  

                    JOptionPane.showMessageDialog(null, "请输入数字");  

                }  

            }  

        }  

    }

    public static String getRandomString(int length,int model) { //length表示生成字符串的长度  

        String base1 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

        String base2 = "abcdefghijklmnopqrstuvwxyz";

        String base3 = "0123456789";

        //根据model设置字符串由哪些组成.

        Random random = new Random();

        String base = new String();

        if(model == 1)

        {

        	base = base1 + base2 + base3;

        }else if (model == 2) {

			base = base2 + base3;

		}else if (model == 3) {

			base = base1 + base3;

		}else if (model == 4) {

			base = base1 + base2;

		}else if (model == 5) {

			base = base3;

		}else if (model == 6) {

			base = base2;

		}else if (model == 7) {

			base = base1;

		}

        StringBuffer sb = new StringBuffer();     

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

            int number = random.nextInt(base.length());     

            sb.append(base.charAt(number));     

        }     

        return sb.toString();  

    }   

	public static void main(String[] args) {

		

		 new RandomString();  

	}



}