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1、用 java Application 应用程序完成中文验证码：（本程序仅供参考，版本所有权归东方学院林华所有）1.创建验证码生成类 makeCertPic：import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.util.Random;public class makeCertPic BufferedImage image2=null;/用于暂时存储生成的图片private char mapTable=我,国,色 ,动,
2、 人 ,的,天 ,城, 日 ,阳,明,华,薇 ,事, 半 ,功,好,德 ,地, 灵 ,电,脑,卓 ,子, 曰 ,一,见,钟 ,情, 请;/* 功能:生成彩色验证码图片* 参数 width为生成图片的宽度,参数 height为生成图片的高度*/public String getCertPic(int width, int height)if(width=0)width=60;if(height=0)height=20;BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); / 获取图形
3、上下文 Graphics g = image.getGraphics(); / 设定背景色 g.setColor(Color.white); g.fillRect(0, 0, width, height); /画边框 g.setColor(Color.black); g.drawRect(0,0,width-1,height-1); / 取随机产生的认证码String strEnsure = ;/ 4 代表 4 位验证码,如果要生成更多位的认证码,则加大数值for(int i=0; i4; +i) strEnsure+=mapTable(int)(mapTable.length*Math.ra
4、ndom();/Math.random()产生的值在 0.0 到 1.0 之间 / 将认证码显示到图像中,如果要生成更多位的认证码,增加drawString语句g.setColor(Color.red); g.setFont(new Font(宋体,Font.PLAIN,18); String str = strEnsure.substring(0,1); g.drawString(str,8,17); str = strEnsure.substring(1,2); g.drawString(str,20,15); str = strEnsure.substring(2,3); g.drawS
5、tring(str,35,18); str = strEnsure.substring(3,4); g.drawString(str,45,15); image2=image;/暂存图片return strEnsure;/返回字符串验证码/图片提供方法public BufferedImage getImage()return image2;2.创建应用小窗口类 ZHCheck：import java.awt.Color;import java.awt.EventQueue;import java.awt.datatransfer.StringSelection;import java.awt.
6、event.ActionEvent;import java.awt.event.ActionListener;import java.awt.image.BufferedImage;import java.util.Arrays;import javax.swing.BorderFactory;import javax.swing.Icon;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.J
7、OptionPane;import javax.swing.JPanel;import javax.swing.JPasswordField;import javax.swing.JTextField;import javax.swing.border.Border;import javax.swing.border.EtchedBorder;import javax.swing.border.TitledBorder;import org.omg.CORBA.PRIVATE_MEMBER;import org.omg.CORBA.PUBLIC_MEMBER;public class ZHCh
8、eck extends JFrameprivate JTextField textIC;/输入的验证码private JLabel tu;/验证码图片显示makeCertPic pic=new makeCertPic();/画图类String ic=;/验证码字符串暂存public ZHCheck()/创建窗口方法this.init();public void init() /窗口方法this.setTitle(图片验证码 );this.setBounds(100, 100, 340, 400);this.creatUI();this.setVisible(true);this.setDefa
9、ultCloseOperation(EXIT_ON_CLOSE);public void creatUI() /功能实现的具体方法final JPanel panel = new JPanel();Border border=BorderFactory.createEtchedBorder(EtchedBorder.LOWERED);TitledBorder tBorder=BorderFactory.createTitledBorder(border);panel.setBorder(tBorder);panel.setLayout(null);this.add(panel);/* 创建用户
10、名输入框* */JLabel nameLbl=new JLabel(用户名：);nameLbl.setBounds(10,50,60,25);panel.add(nameLbl);final JTextField nameTxt=new JTextField();nameTxt.setBounds(80, 50, 200, 22);panel.add(nameTxt);/* 创建密码框* */JLabel pwdLbl=new JLabel(密 码 ： );pwdLbl.setBounds(10,80,60,25);panel.add(pwdLbl);final JPasswordField
11、pwd=new JPasswordField();pwd.setBounds(80, 80, 200, 22);panel.add(pwd);/* 创建验证码框* */JLabel cLbl=new JLabel(验证码： );cLbl.setBounds(10,110,60,25);panel.add(cLbl);textIC=new JTextField();textIC.setBounds(80, 110, 50, 22);panel.add(textIC);/* 显示一张验证码* */ic=pic.getCertPic(75, 22);BufferedImage image=pic.g
12、etImage();Icon icon=new ImageIcon(image);tu = new JLabel(icon);tu.setBackground(Color.LIGHT_GRAY);tu.setBounds(135, 110, 75, 22);panel.add(tu);/* 实现“换一张”功能* */JButton next = new JButton(换一张);next.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) ic=pic.getCertPic(75,
13、22);BufferedImage image=pic.getImage();Icon icon=new ImageIcon(image);tu.setIcon(icon);/void);next.setBounds(215,110,75,22);panel.add(next);/* 提交以及检验用户名，密码，验证码功能，用 户名默认 123456，密码默认 123，先检验验证码，然后检验用户名密码*/JButton btn = new JButton(提交 );btn.setBounds(50, 200, 70, 22);btn.addActionListener(new ActionLis
14、tener() public void actionPerformed(ActionEvent arg0) String s1=nameTxt.getText();char s2=pwd.getPassword();char pw=1,2,3;char ps=;String s=textIC.getText().toString();s=s.toLowerCase();if(s1.equals()JOptionPane.showMessageDialog(panel,/it is a JAVA internal STD message BOX请输入用户名！,Warning,JOptionPan
15、e.WARNING_MESSAGE);else if(Arrays.equals(s2,ps)JOptionPane.showMessageDialog(panel,/it is a JAVA internal STD message BOX请输入密码！,Warning,JOptionPane.WARNING_MESSAGE);else if(s.equals()JOptionPane.showMessageDialog(panel,/it is a JAVA internal STD message BOX请输入验证码！,Warning,JOptionPane.WARNING_MESSAGE);else if(ic.equals(s)if (s1.equals(123456) & Arrays.equals(s2,pw) JOptionPane.showMessageDialog(panel,登录成功 ！,Message,JOptionPane.INFORMATION_MESSAGE);System.exit(0);else JOptionPane.showMessageDialog(panel,/it is a JAVA internal STD message BOX您的用户名
