1、VerifyCode 验证码类
import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.Random; /** * 验证码生成器 */ public class ValidateCode { // 图片的宽度。 private int width = 160; // 图片的高度。 private int height = 40; // 验证码字符个数 private int codeCount = 5; // 验证码干扰线数 private int lineCount = 150; // 验证码 private String code = null; // 验证码图片Buffer private BufferedImage buffImg=null; private char[] codeSequence = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J','K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W','X', 'Y', 'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9' }; public ValidateCode() { this.createCode(); } /** * * @param width 图片宽 * @param height 图片高 */ public ValidateCode(int width,int height) { this.width=width; this.height=height; this.createCode(); } /** * * @param width 图片宽 * @param height 图片高 * @param codeCount 字符个数 * @param lineCount 干扰线条数 */ public ValidateCode(int width,int height,int codeCount,int lineCount) { this.width=width; this.height=height; this.codeCount=codeCount; this.lineCount=lineCount; this.createCode(); } public void createCode() { int x = 0,fontHeight=0,codeY=0; int red = 0, green = 0, blue = 0; x = width / (codeCount +2);//每个字符的宽度 fontHeight = height - 2;//字体的高度 codeY = height - 4; // 图像buffer buffImg = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB); Graphics2D g = buffImg.createGraphics(); // 生成随机数 Random random = new Random(); // 将图像填充为白色 g.setColor(Color.WHITE); g.fillRect(0, 0, width, height); // 创建字体 ImgFontByte imgFont=new ImgFontByte(); Font font =imgFont.getFont(fontHeight); g.setFont(font); for (int i = 0; i < lineCount; i++) { int xs = random.nextInt(width); int ys = random.nextInt(height); int xe = xs+random.nextInt(width/8); int ye = ys+random.nextInt(height/8); red = random.nextInt(255); green = random.nextInt(255); blue = random.nextInt(255); g.setColor(new Color(red, green, blue)); g.drawLine(xs, ys, xe, ye); } // randomCode记录随机产生的验证码 StringBuffer randomCode = new StringBuffer(); // 随机产生codeCount个字符的验证码。 for (int i = 0; i < codeCount; i++) { String strRand = String.valueOf(codeSequence[random.nextInt(codeSequence.length)]); // 产生随机的颜色值,让输出的每个字符的颜色值都将不同。 red = random.nextInt(255); green = random.nextInt(255); blue = random.nextInt(255); g.setColor(new Color(red, green, blue)); g.drawString(strRand, (i + 1) * x, codeY); // 将产生的四个随机数组合在一起。 randomCode.append(strRand); } // 将四位数字的验证码保存到Session中。 code = randomCode.toString(); } public void write(String filePath) throws IOException { OutputStream out = new FileOutputStream(filePath); this.write(out); } public void write(OutputStream out) throws IOException { ImageIO.write(buffImg, "png", out); out.close(); } public BufferedImage getBuffImg() { return buffImg; } public String getCode() { return code; } }
2、ImgFontByte 字体类 (可读取自定义ttf文件)
import java.awt.*; /** * ttf字体文件 * @author dsna * */ public class ImgFontByte { public Font getFont(int fontHeight){ // 使用自定义字体 // byte[] bytes= FileUtil.readBytes(new File("C:/Windows/Fonts/simsunb.ttf")); // Font baseFont =Font.createFont(Font.TRUETYPE_FONT,new ByteArrayInputStream(bytes)); // return baseFont.deriveFont(Font.PLAIN, fontHeight); return new Font("Arial",Font.PLAIN, fontHeight);//默认使用 Arial 字体 } }
3、 测试代码 (生成图形验证码)
import org.junit.Test; import java.io.File; import java.io.FileOutputStream; public class ValidateCodeTest { @Test public void test1(){ try { //宽度、高度、字符个数、干扰线条数 ValidateCode verifyCode = new ValidateCode(120,50,4,20); System.out.println("verifyCode值:"+verifyCode.getCode()); verifyCode.write(new FileOutputStream(new File("d:/vcode.png"))); System.out.println("ok"); // }catch (Exception e){ e.printStackTrace(); } } }
打开d:/vcode.png文件,即是随机生成的图形验证码。
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