java小应用程序实现中文验证码功能.doc

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,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.random();/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.drawString(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.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.JOptionPane;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 ZHCheck 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.setDefaultCloseOperation(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 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.getImage();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, 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 ActionListener() 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,JOptionPane.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您的用户名或密码错误，请重新输入！,Warning,JOptionPane.WARNING_MESSAGE);Arrays.fill(s2,0);elseJOptionPane.showMessageDialog(null,验证码错误！););panel.add(btn);/* * 重置功能 * */JButton btn2 = new JButton(重置);btn2.setBounds(150, 200, 70, 22);panel.add(btn2);btn2.addActionListener(new Actio