Java-JFrame窗体美化

Java-JFrame窗体美化

　　JFrame默认的窗体比较土，可以通过一定的美化，让窗体表现的比较漂亮，具体要根据设计的设计图进行美化；

　　JFrame美化的大致思路：先将JFrame去除默认美化效果，实现JWindow效果，然后再JWindow基础上对窗体的各项内容自定义设置与美化，大多用到插入背景图片、添加各种鼠标事件、弹窗与输入框等圆角等各种美化；

　　下面是一个登录窗体的美化代码，以后再有对窗体美化的可以参照一下代码进行美化：

1、Login实体类代码：

package com;

import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Image;
import java.awt.geom.RoundRectangle2D;
import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
import javax.swing.JRootPane;
import javax.swing.JLabel;

import com.alibaba.fastjson.JSON;
import com.model.Message;
import com.model.User;
import com.sun.awt.AWTUtilities;
import com.util.FileUtils;
import com.util.MyButton;
import com.util.MyLineBorder;
import com.util.VerifyCodeUtils;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JTextField;
import javax.swing.border.MatteBorder;
import javax.swing.JPasswordField;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
/**
 * 用户登录窗体（按照设计图片效果制作）
 * @author admin
 *
 */
public class Login1{

	private JFrame frame;//窗体
	private JTextField userNameField;//用户名输入框
	private JPasswordField passwordField;//密码输入框
	private JTextField verifyCodeField;//验证码输入框
	private String verifyCode;//验证码图片中的验证码值

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					Login1 window = new Login1();
					window.frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}
	/**
	 * Create the application.
	 */
	public Login1() {
		initialize();
	}
	/**
	 * Initialize the contents of the frame.
	 */
	private void initialize() {
		//将存储验证码文件夹下的所有验证码图片删除
		FileUtils.deleteAllFiles("./verifyCodeImg");
		//自定义圆角输入框边界线
		MyLineBorder myLineBorder = new MyLineBorder(new Color(192, 192, 192), 1 , true);
		//只显示输入框的下边框
		MatteBorder bottomBorder = new MatteBorder(0, 0, 1, 0, new Color(192, 192, 192)); 
		//设置JFrame禁用本地外观，使用下面自定义设置的外观；
		JFrame.setDefaultLookAndFeelDecorated(true);
		frame = new JFrame();
		frame.setBounds(0, 0, 300, 490);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().setLayout(null);
		/**
		 * 对窗体进行基本设置
		 */
		//设置窗体在计算机窗口的中心部位显示
		frame.setLocationRelativeTo(frame.getOwner());
		// 去掉窗口的装饰 
		frame.setUndecorated(true);
		//采用指定的窗口装饰风格
		frame.getRootPane().setWindowDecorationStyle(JRootPane.NONE); 
		//设置窗体圆角，最后两个参数分别为圆角的宽度、高度数值，一般这两个数值都是一样的
		AWTUtilities.setWindowShape(frame,
				new RoundRectangle2D.Double(0.0D, 0.0D, frame.getWidth(), frame.getHeight(), 20.0D, 20.0D));
		//设置背景颜色，记住一定要修改frame.getContentPane()的颜色，因为我们看到的都是这个的颜色而并不是frame的颜色
		frame.getContentPane().setBackground(Color.white);
		/**
		 * 插入顶部非凡汽车背景图片
		 */
		//创建具有分层的JLayeredPane
		JLayeredPane layeredPane = new JLayeredPane();
		layeredPane.setBounds(0, -5, 300, 200);
		frame.getContentPane().add(layeredPane);
		// 创建图片对象
		ImageIcon img = new ImageIcon(Login1.class.getResource("/images/dingbu.jpg"));
		//设置图片在窗体中显示的宽度、高度
		img.setImage(img.getImage().getScaledInstance(300, 200,Image.SCALE_DEFAULT));
		
		JPanel panel = new JPanel();
		panel.setBounds(0, -5, 300, 200);
		layeredPane.add(panel, JLayeredPane.DEFAULT_LAYER);
		
		JLabel lblNewLabel = new JLabel("");
		panel.add(lblNewLabel);
		lblNewLabel.setIcon(img);
		/**
		 * 插入窗体关闭的背景图片及功能
		 */
		// 创建图片对象
		ImageIcon closeImg = new ImageIcon(Login1.class.getResource("/images/close.png"));
		//设置图片在窗体中显示的宽度、高度
		closeImg.setImage(closeImg.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
		
		JPanel closePanel = new JPanel();
		closePanel.setBounds(269, -5, 31, 31);
		layeredPane.add(closePanel,JLayeredPane.MODAL_LAYER);
		
		JLabel closeLabel = new JLabel("");
		closePanel.add(closeLabel);
		closeLabel.setIcon(closeImg);
		closeLabel.addMouseListener(new MouseAdapter() {
			//鼠标点击关闭图片，实现关闭窗体的功能
			@Override
			public void mouseClicked(MouseEvent e) {
				//dispose();  
                System.exit(0);//使用dispose();也可以关闭只是不是真正的关闭
			}
			//鼠标进入，换关闭的背景图片
			@Override
			public void mouseEntered(MouseEvent e) {
				// 创建图片对象
				ImageIcon closeImg1 = new ImageIcon(Login1.class.getResource("/images/mouse_close.png"));
				//设置图片在窗体中显示的宽度、高度
				closeImg1.setImage(closeImg1.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
				closeLabel.setIcon(closeImg1);
			}
			//鼠标离开，换关闭的背景图片
			@Override
			public void mouseExited(MouseEvent e) {
				// 创建图片对象
				ImageIcon closeImg = new ImageIcon(Login1.class.getResource("/images/close.png"));
				//设置图片在窗体中显示的宽度、高度
				closeImg.setImage(closeImg.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
				closeLabel.setIcon(closeImg);
			}
		});
		/**
		 * 插入窗体最小化的背景图片及功能
		 */
		// 创建图片对象
		ImageIcon minImg = new ImageIcon(Login1.class.getResource("/images/min.png"));
		//设置图片在窗体中显示的宽度、高度
		minImg.setImage(minImg.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
		
		JPanel minPanel = new JPanel();
		minPanel.setBounds(237, -5, 31, 31);
		layeredPane.add(minPanel,JLayeredPane.MODAL_LAYER);
		
		JLabel minLabel = new JLabel("");
		minLabel.addMouseListener(new MouseAdapter() {
			//鼠标点击最小化图片，实现最小化窗体的功能
			@Override
			public void mouseClicked(MouseEvent e) {
				frame.setExtendedState(JFrame.ICONIFIED);//最小化窗体
			}
			//鼠标进入，换最小化的背景图片
			@Override
			public void mouseEntered(MouseEvent e) {
				// 创建图片对象
				ImageIcon minImg1 = new ImageIcon(Login1.class.getResource("/images/mouse_min.png"));
				//设置图片在窗体中显示的宽度、高度
				minImg1.setImage(minImg1.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
				minLabel.setIcon(minImg1);
			}
			//鼠标离开，换最小化的背景图片
			@Override
			public void mouseExited(MouseEvent e) {
				// 创建图片对象
				ImageIcon minImg = new ImageIcon(Login1.class.getResource("/images/min.png"));
				//设置图片在窗体中显示的宽度、高度
				minImg.setImage(minImg.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
				minLabel.setIcon(minImg);
			}
		});
		minPanel.add(minLabel);
		minLabel.setIcon(minImg);
		/**
		 * 插入用户名输入框前面的图片
		 */
		// 创建图片对象
		ImageIcon userNameImg = new ImageIcon(Login1.class.getResource("/images/user_name.png"));
		//设置图片在窗体中显示的宽度、高度
		userNameImg.setImage(userNameImg.getImage().getScaledInstance(40, 40,Image.SCALE_DEFAULT));
		
		JLabel userNameLabel = new JLabel("");
		userNameLabel.setBounds(0, 220, 40, 40);
		userNameLabel.setIcon(userNameImg);
		//默认获取光标
		userNameLabel.setFocusable(true);
		frame.getContentPane().add(userNameLabel);
		/**
		 * 添加圆角的用户名输入框
		 */
		userNameField = new JTextField();
		userNameField.setBounds(50, 220, 235, 50);
		userNameField.setBorder(bottomBorder);
		userNameField.setText("  用户名");
		userNameField.setFont(new Font("微软雅黑", 0, 14));
		userNameField.setForeground(Color.GRAY);//默认设置输入框中的文字颜色为灰色
		userNameField.addFocusListener(new FocusAdapter() {
			//获取光标事件
			@Override
			public void focusGained(FocusEvent e) {
				//获取焦点时，输入框中内容是“用户名”，那么去掉输入框中显示的内容；
				if("用户名".equals((userNameField.getText().trim()))){
					userNameField.setText("");
					userNameField.setForeground(Color.black);//设置颜色为黑色
				}
			}
			//失去光标事件
			@Override
			public void focusLost(FocusEvent e) {
				//失去焦点时，如果输入框中去掉空格后的字符串为空串则显示用户名
				if("".equals((userNameField.getText().trim()))){
					userNameField.setText("  用户名");
					userNameField.setFont(new Font("微软雅黑", 0, 14));
					userNameField.setForeground(Color.GRAY);//默认设置输入框中的文字颜色为灰色
				}
			}
		});
		frame.getContentPane().add(userNameField);
		userNameField.setColumns(10);
		/**
		 * 插入密码输入框前面的图片
		 */
		// 创建图片对象
		ImageIcon passwordImg = new ImageIcon(Login1.class.getResource("/images/password.png"));
		//设置图片在窗体中显示的宽度、高度
		passwordImg.setImage(passwordImg.getImage().getScaledInstance(40, 40,Image.SCALE_DEFAULT));
		
		JLabel passwordLabel = new JLabel("");
		passwordLabel.setBounds(0, 280, 40, 40);
		passwordLabel.setIcon(passwordImg);
		frame.getContentPane().add(passwordLabel);
		/**
		 * 添加圆角的密码输入框
		 */
		passwordField = new JPasswordField();
		passwordField.setBounds(50, 280, 235, 50);
		passwordField.setBorder(bottomBorder);
		passwordField.setText("  密码");
		passwordField.setFont(new Font("微软雅黑", 0, 14));
		passwordField.setForeground(Color.GRAY);//默认设置输入框中的文字颜色为灰色
		passwordField.setEchoChar((char)0);//显示密码输入框中内容
		passwordField.addFocusListener(new FocusAdapter() {
			//获取光标事件
			@Override
			public void focusGained(FocusEvent e) {
				//获取焦点时，输入框中内容是“用户名”，那么去掉输入框中显示的内容；
				if("密码".equals((passwordField.getText().trim()))){
					passwordField.setText("");
					passwordField.setEchoChar('*');//显示密码输入框中内容
					passwordField.setForeground(Color.black);//设置颜色为黑色
				}
			}
			//失去光标事件
			@Override
			public void focusLost(FocusEvent e) {
				//失去焦点时，如果输入框中去掉空格后的字符串为空串则显示用户名
				if("".equals((passwordField.getText().trim()))){
					passwordField.setText("  密码");
					passwordField.setFont(new Font("微软雅黑", 0, 14));
					passwordField.setForeground(Color.GRAY);//默认设置输入框中的文字颜色为灰色
					passwordField.setEchoChar((char)0);//显示密码输入框中内容
				}
			}
		});
		
		frame.getContentPane().add(passwordField);
		/**
		 * 插入验证码输入框前面的图片
		 */
		// 创建图片对象
		ImageIcon verifyCodeImg = new ImageIcon(Login1.class.getResource("/images/verify_code.png"));
		//设置图片在窗体中显示的宽度、高度
		verifyCodeImg.setImage(verifyCodeImg.getImage().getScaledInstance(40, 40,Image.SCALE_DEFAULT));
		
		JLabel verifyCodeLabel = new JLabel("");
		verifyCodeLabel.setBounds(0, 340, 40, 40);
		verifyCodeLabel.setIcon(verifyCodeImg);
		frame.getContentPane().add(verifyCodeLabel);
		/**
		 * 添加圆角的验证码输入框
		 */
		verifyCodeField = new JTextField();
		verifyCodeField.setBounds(50, 340, 135, 50);
		verifyCodeField.setBorder(bottomBorder);
		verifyCodeField.setText("  验证码");
		verifyCodeField.setFont(new Font("微软雅黑", 0, 14));
		verifyCodeField.setForeground(Color.GRAY);//默认设置输入框中的文字颜色为灰色
		verifyCodeField.addFocusListener(new FocusAdapter() {
			//获取光标事件
			@Override
			public void focusGained(FocusEvent e) {
				//获取焦点时，输入框中内容是“用户名”，那么去掉输入框中显示的内容；
				if("验证码".equals((verifyCodeField.getText().trim()))){
					verifyCodeField.setText("");
					verifyCodeField.setForeground(Color.black);//设置颜色为黑色
				}
			}
			//失去光标事件
			@Override
			public void focusLost(FocusEvent e) {
				//失去焦点时，如果输入框中去掉空格后的字符串为空串则显示用户名
				if("".equals((verifyCodeField.getText().trim()))){
					verifyCodeField.setText("  验证码");
					verifyCodeField.setFont(new Font("微软雅黑", 0, 14));
					verifyCodeField.setForeground(Color.GRAY);//默认设置输入框中的文字颜色为灰色
				}
			}
		});
		
		frame.getContentPane().add(verifyCodeField);
		verifyCodeField.setColumns(10);
		/**
		 * 添加验证码图片
		 */
		JLabel verifyCodeImgLabel = new JLabel("");
		verifyCodeImgLabel.setBounds(190, 340, 95, 50);
		verifyCodeImgLabel.setBorder(myLineBorder);
		frame.getContentPane().add(verifyCodeImgLabel);
		//生成一张验证码图片
		verifyCode = VerifyCodeUtils.createOneCodeImage();
		//将刚生成的验证码图片显示在窗体中去
		ImageIcon verifyCodeSourceImg = new ImageIcon("./verifyCodeImg/"+verifyCode+".jpg");// 创建图片对象
		//设置图片在窗体中显示的宽度、高度
		verifyCodeSourceImg.setImage(verifyCodeSourceImg.getImage().getScaledInstance(95, 50,Image.SCALE_DEFAULT));
		verifyCodeImgLabel.setIcon(verifyCodeSourceImg);
		//点击验证码图片，换一个新的验证码图片
		verifyCodeImgLabel.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent e) {
				//删除上一次的验证码图片
				File file = new File("./src/verifyCodeImg/"+verifyCode+".jpg");
				if(file.exists()){
					file.delete();
				}
				//生成一张新的验证码图片
				verifyCode = VerifyCodeUtils.createOneCodeImage();
				ImageIcon verifyCodeSourceImg1 = new ImageIcon("./verifyCodeImg/"+verifyCode+".jpg");
				verifyCodeSourceImg1.setImage(verifyCodeSourceImg1.getImage().getScaledInstance(95, 50,Image.SCALE_DEFAULT));
				verifyCodeImgLabel.setIcon(verifyCodeSourceImg1);
			}
		});
		/**
		 * 添加提示性信息的JLabel
		 */
		JLabel reminderMessage = new JLabel("",JLabel.CENTER);
		reminderMessage.setBounds(15, 395, 270, 20);
		reminderMessage.setForeground(Color.red);
		reminderMessage.setFont(new Font("微软雅黑", 0, 12));
		frame.getContentPane().add(reminderMessage);
		/**
		 * 添加圆角的提交按钮
		 */
		MyButton myButton = new MyButton("安全登录", 0);
		myButton.setBounds(15, 420, 270, 50);
		frame.getContentPane().add(myButton);
		
		
		//设置窗体可见
		frame.setVisible(true);
	}
	
}

2、工具类FileUtils代码：

package com.util;

import java.io.File;

/**
 * 对文件操作的工具类
 * @author admin
 *
 */
public class FileUtils {
	
	/**
	 * 删除指定文件夹下的所有文件，此文件夹内只有文件，没有任何文件夹
	 */
	public static Boolean deleteAllFiles(String filePath){
		Boolean result = false;
		File file = new File(filePath);
		File temp = null;
		if(file.exists()){
			String [] tempList = file.list();
			for (String string : tempList) {
				temp = new File(filePath+"/"+string);
				if(temp.isFile()){
					temp.delete();
				}
			}
			tempList = file.list();
			if(tempList.length==0){
				result = true;
			}
		}
		return result;
	}
	
	public static void main(String[] args) {
		Boolean result = FileUtils.deleteAllFiles("./verifyCodeImg");
		System.out.println(result);
	}

}

3、工具类MyButton代码：

package com.util;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.RoundRectangle2D;
import javax.swing.JButton;
import javax.swing.JFrame;
/**
 * 自定义带有圆角的按钮工具类
 * @author admin
 *
 */
public class MyButton extends JButton {
	/* 决定圆角的弧度 */
	public static int radius = 4;
	public static Color COLOR1, COLOR2;
	public static int pink = 3, ashen = 2, sky = 1, stone = 0;
	/* 粉红 */
	public static Color pink1 = new Color(39, 121, 181);
	public static Color pink2 = new Color(39, 121, 181);
	/* 灰白 */
	public static Color ashen1 = new Color(39, 121, 181);
	public static Color ashen2 = new Color(39, 121, 181);
	/* 深宝石蓝 */
	public static Color stone1 = new Color(39, 121, 181);
	public static Color stone2 = new Color(39, 121, 181);
	/* 淡天蓝色 */
	public static Color sky1 = new Color(39, 121, 181);
	public static Color sky2 = new Color(39, 121, 181);
	/* 光标进入按钮判断 */
	private boolean hover;

	public MyButton() {
		this("", stone);
	}

	public MyButton(String name) {
		this(name, stone);
	}

	public MyButton(String name, int style) {
		super.setText(name);
		if (style == pink) {
			COLOR1 = pink1;
			COLOR2 = pink2;
		}
		if (style == ashen) {
			COLOR1 = ashen1;
			COLOR2 = ashen2;
		}
		if (style == stone) {
			COLOR1 = stone1;
			COLOR2 = stone2;
		}
		if (style == sky) {
			COLOR1 = sky1;
			COLOR2 = sky2;
		}
		paintcolor(COLOR1, COLOR2);
	}

	private void paintcolor(Color COLOR1, Color COLOR2) {
		setMargin(new Insets(0, 0, 0, 0));
		setFont(new Font("微软雅黑", 0, 14));
		setBorderPainted(false);
		setForeground(Color.white);
		setFocusPainted(false);
		setContentAreaFilled(false);
	}

	@Override
	protected void paintComponent(Graphics g) {
		Graphics2D g2d = (Graphics2D) g.create();
		int height = getHeight();
		int with = getWidth();
		float tran = 0.9F;
		/*if (!hover) { 鼠标离开/进入时的透明度改变量 
			tran = 0.6F;
		}*/
		g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
		/* GradientPaint是颜色渐变类 */
		GradientPaint p1;
		GradientPaint p2;
		if (getModel().isPressed()) {
			p1 = new GradientPaint(0, 0, new Color(0, 0, 0), 0, height, new Color(100, 100, 100), true);
			p2 = new GradientPaint(0, 1, new Color(0, 0, 0, 50), 0, height, new Color(255, 255, 255, 100), true);
		} else {
			p1 = new GradientPaint(0, 0, new Color(100, 100, 100), 0, height, new Color(0, 0, 0), true);
			p2 = new GradientPaint(0, 1, new Color(255, 255, 255, 100), 0, height, new Color(0, 0, 0, 50), true);
		}
		g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, tran));
		RoundRectangle2D.Float r2d = new RoundRectangle2D.Float(0, 0, with - 1, height - 1, radius, radius);
		// 最后两个参数数值越大，按钮越圆，以下同理
		Shape clip = g2d.getClip();
		g2d.clip(r2d);
		GradientPaint gp = new GradientPaint(0.0F, 0.0F, COLOR1, 0.0F, height / 2, COLOR2, true);
		g2d.setPaint(gp);
		g2d.fillRect(0, 0, with, height);
		g2d.setClip(clip);
		g2d.setPaint(p1);
		g2d.drawRoundRect(0, 0, with - 3, height - 3, radius, radius);
		g2d.setPaint(p2);
		g2d.drawRoundRect(1, 1, with - 3, height - 3, radius, radius);
		g2d.dispose();
		super.paintComponent(g);
	}

	public static void main(String args[]) {
		JFrame frm = new JFrame();
		MyButton but = new MyButton("圆角JButton", 0);
		frm.setLayout(null);
		frm.setBounds(800, 400, 500, 200);
		but.setBounds(30, 30, 200, 50);
		frm.add(but);
		frm.setDefaultCloseOperation(3);
		frm.setVisible(true);
	}
}

4、工具类MyLineBorder代码：

package com.util;  
  
import java.awt.Color;  
import java.awt.Component;  
import java.awt.Graphics;  
import java.awt.Graphics2D;  
import java.awt.RenderingHints;

import javax.swing.border.LineBorder;
 
/**
 * 为创建圆角输入框自定义边框线条工具类
 * @author admin
 *
 */
public class MyLineBorder extends LineBorder{  
  
  
    private static final long serialVersionUID = 1L;  
      
    public MyLineBorder(Color color, int thickness, boolean roundedCorners) {  
        super(color, thickness, roundedCorners);  
    }  
  
  
  
     public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {  
           
         RenderingHints rh = new RenderingHints(RenderingHints.KEY_ANTIALIASING,  
                                                RenderingHints.VALUE_ANTIALIAS_ON);   
         Color oldColor = g.getColor();  
         Graphics2D g2 = (Graphics2D)g;  
         int i;  
         g2.setRenderingHints(rh);  
         g2.setColor(lineColor);  
         for(i = 0; i < thickness; i++)  {  
         if(!roundedCorners)  
             g2.drawRect(x+i, y+i, width-i-i-1, height-i-i-1);  
         else  
             g2.drawRoundRect(x+i, y+i, width-i-i-1, height-i-i-1, 10, 10); //就是这一句 ，后两个参数控制圆角的大小
         }  
         g2.setColor(oldColor);  
    }
     
     
} 

5、工具类VerifyCodeUtils代码：

package com.util;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.Random;

import javax.imageio.ImageIO;
/**
 * 生成验证码图片的工具类
 * @author admin
 *
 */
public class VerifyCodeUtils {

	// 使用到Algerian字体，系统里没有的话需要安装字体，字体只显示大写，去掉了1,0,i,o几个容易混淆的字符
	public static final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ";
	private static Random random = new Random();

	/**
	 * 使用系统默认字符源生成验证码
	 * 
	 * @param verifySize
	 *            验证码长度
	 * @return
	 */
	public static String generateVerifyCode(int verifySize) {
		return generateVerifyCode(verifySize, VERIFY_CODES);
	}

	/**
	 * 使用指定源生成验证码
	 * 
	 * @param verifySize
	 *            验证码长度
	 * @param sources
	 *            验证码字符源
	 * @return
	 */
	public static String generateVerifyCode(int verifySize, String sources) {
		if (sources == null || sources.length() == 0) {
			sources = VERIFY_CODES;
		}
		int codesLen = sources.length();
		Random rand = new Random(System.currentTimeMillis());
		StringBuilder verifyCode = new StringBuilder(verifySize);
		for (int i = 0; i < verifySize; i++) {
			verifyCode.append(sources.charAt(rand.nextInt(codesLen - 1)));
		}
		return verifyCode.toString();
	}

	/**
	 * 生成随机验证码文件,并返回验证码值
	 * 
	 * @param w
	 * @param h
	 * @param outputFile
	 * @param verifySize
	 * @return
	 * @throws IOException
	 */
	public static String outputVerifyImage(int w, int h, File outputFile, int verifySize) throws IOException {
		String verifyCode = generateVerifyCode(verifySize);
		outputImage(w, h, outputFile, verifyCode);
		return verifyCode;
	}

	/**
	 * 输出随机验证码图片流,并返回验证码值
	 * 
	 * @param w
	 * @param h
	 * @param os
	 * @param verifySize
	 * @return
	 * @throws IOException
	 */
	public static String outputVerifyImage(int w, int h, OutputStream os, int verifySize) throws IOException {
		String verifyCode = generateVerifyCode(verifySize);
		outputImage(w, h, os, verifyCode);
		return verifyCode;
	}

	/**
	 * 生成指定验证码图像文件
	 * 
	 * @param w
	 * @param h
	 * @param outputFile
	 * @param code
	 * @throws IOException
	 */
	public static void outputImage(int w, int h, File outputFile, String code) throws IOException {
		if (outputFile == null) {
			return;
		}
		File dir = outputFile.getParentFile();
		if (!dir.exists()) {
			dir.mkdirs();
		}
		try {
			outputFile.createNewFile();
			FileOutputStream fos = new FileOutputStream(outputFile);
			outputImage(w, h, fos, code);
			fos.close();
		} catch (IOException e) {
			throw e;
		}
	}

	/**
	 * 输出指定验证码图片流
	 * 
	 * @param w
	 * @param h
	 * @param os
	 * @param code
	 * @throws IOException
	 */
	public static void outputImage(int w, int h, OutputStream os, String code) throws IOException {
		int verifySize = code.length();
		BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
		Random rand = new Random();
		Graphics2D g2 = image.createGraphics();
		g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
		Color[] colors = new Color[5];
		Color[] colorSpaces = new Color[] { Color.WHITE, Color.CYAN, Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA,
				Color.ORANGE, Color.PINK, Color.YELLOW };
		float[] fractions = new float[colors.length];
		for (int i = 0; i < colors.length; i++) {
			colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];
			fractions[i] = rand.nextFloat();
		}
		Arrays.sort(fractions);

		g2.setColor(Color.GRAY);// 设置边框色
		g2.fillRect(0, 0, w, h);

		Color c = getRandColor(200, 250);
		g2.setColor(c);// 设置背景色
		g2.fillRect(0, 2, w, h - 4);

		// 绘制干扰线
		Random random = new Random();
		g2.setColor(getRandColor(160, 200));// 设置线条的颜色
		for (int i = 0; i < 20; i++) {
			int x = random.nextInt(w - 1);
			int y = random.nextInt(h - 1);
			int xl = random.nextInt(6) + 1;
			int yl = random.nextInt(12) + 1;
			g2.drawLine(x, y, x + xl + 40, y + yl + 20);
		}

		// 添加噪点
		float yawpRate = 0.05f;// 噪声率
		int area = (int) (yawpRate * w * h);
		for (int i = 0; i < area; i++) {
			int x = random.nextInt(w);
			int y = random.nextInt(h);
			int rgb = getRandomIntColor();
			image.setRGB(x, y, rgb);
		}

		shear(g2, w, h, c);// 使图片扭曲

		g2.setColor(getRandColor(100, 160));
		int fontSize = h - 4;
		Font font = new Font("Algerian", Font.ITALIC, fontSize);
		g2.setFont(font);
		char[] chars = code.toCharArray();
		for (int i = 0; i < verifySize; i++) {
			AffineTransform affine = new AffineTransform();
			affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() ? 1 : -1),
					(w / verifySize) * i + fontSize / 2, h / 2);
			g2.setTransform(affine);
			g2.drawChars(chars, i, 1, ((w - 10) / verifySize) * i + 5, h / 2 + fontSize / 2 - 10);
		}

		g2.dispose();
		ImageIO.write(image, "jpg", os);
	}

	private static Color getRandColor(int fc, int bc) {
		if (fc > 255)
			fc = 255;
		if (bc > 255)
			bc = 255;
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		return new Color(r, g, b);
	}

	private static int getRandomIntColor() {
		int[] rgb = getRandomRgb();
		int color = 0;
		for (int c : rgb) {
			color = color << 8;
			color = color | c;
		}
		return color;
	}

	private static int[] getRandomRgb() {
		int[] rgb = new int[3];
		for (int i = 0; i < 3; i++) {
			rgb[i] = random.nextInt(255);
		}
		return rgb;
	}

	private static void shear(Graphics g, int w1, int h1, Color color) {
		shearX(g, w1, h1, color);
		shearY(g, w1, h1, color);
	}

	private static void shearX(Graphics g, int w1, int h1, Color color) {

		int period = random.nextInt(2);

		boolean borderGap = true;
		int frames = 1;
		int phase = random.nextInt(2);

		for (int i = 0; i < h1; i++) {
			double d = (double) (period >> 1)
					* Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
			g.copyArea(0, i, w1, 1, (int) d, 0);
			if (borderGap) {
				g.setColor(color);
				g.drawLine((int) d, i, 0, i);
				g.drawLine((int) d + w1, i, w1, i);
			}
		}

	}

	private static void shearY(Graphics g, int w1, int h1, Color color) {

		int period = random.nextInt(40) + 10; // 50;

		boolean borderGap = true;
		int frames = 20;
		int phase = 7;
		for (int i = 0; i < w1; i++) {
			double d = (double) (period >> 1)
					* Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
			g.copyArea(i, 0, 1, h1, 0, (int) d);
			if (borderGap) {
				g.setColor(color);
				g.drawLine(i, (int) d, i, 0);
				g.drawLine(i, (int) d + h1, i, h1);
			}

		}

	}
	
	//生成一张验证码图片，并保存到项目的verifyCodeImg文件夹下
	public static String createOneCodeImage(){
		String imgName = "";
		try {
			File dir = new File("./verifyCodeImg");
			int w = 95, h = 50;
			String verifyCode = generateVerifyCode(4);
			File file = new File(dir, verifyCode + ".jpg");
			outputImage(w, h, file, verifyCode);
			imgName = verifyCode;
		} catch (IOException e) {
			imgName = "";
			e.printStackTrace();
		}finally{
			return imgName;
		}
	}

	public static void main(String[] args) throws IOException {
		
		String codeImage = VerifyCodeUtils.createOneCodeImage();
		System.out.println(codeImage);
	
	}
}

 

转载于:https://www.cnblogs.com/lsy-blogs/p/7717322.html