验证码生成器

packagecom.lizhou.tools;importjava.awt.Color;importjava.awt.Font;importjava.awt.Graphics;import java.awt.Graphics2D;importjava.awt.image.BufferedImage;importjava.util.Random;/*** 验证码生成器** @author bojiangzhou*/public class VCodeGenerator {/*** 验证码来源*/final private char[] code = {'2', '3', '4', '5', '6', '7', '8', '9','a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j','k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v','w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F','G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R','S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};/*** 字体*/final private String[] fontNames = new String[]{"黑体", "宋体", "Courier", "Arial","Verdana", "Times", "Tahoma", "Georgia"};/*** 字体样式*/final private int[] fontStyles = new int[]{Font.BOLD, Font.ITALIC|Font.BOLD };/*** 验证码长度* 默认4个字符*/privateintvcodeLen = 4;/*** 验证码图片字体大小* 默认17*/privateintfontsize = 21;/*** 验证码图片宽度*/privateint width = (fontsize+1)*vcodeLen+10;/*** 验证码图片高度*/privateint height = fontsize+12;/*** 干扰线条数* 默认3条*/privateintdisturbline = 3;publicVCodeGenerator(){}/*** 指定验证码长度* @paramvcodeLen验证码长度*/publicVCodeGenerator(intvcodeLen) {this.vcodeLen = vcodeLen;this.width = (fontsize+1)*vcodeLen+10;}/*** 生成验证码图片* @paramvcode要画的验证码* @paramdrawline是否画干扰线* @return*/publicBufferedImagegeneratorVCodeImage(String vcode, booleandrawline){//创建验证码图片BufferedImagevcodeImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics g = vcodeImage.getGraphics();//填充背景色g.setColor(new Color(246, 240, 250));g.fillRect(0, 0, width, height);if(drawline){drawDisturbLine(g);}//用于生成伪随机数Random ran = new Random();//在图片上画验证码for(int i = 0;i <vcode.length();i++){//设置字体g.setFont(new Font(fontNames[ran.nextInt(fontNames.length)], fontStyles[ran.nextInt(fontStyles.length)], fontsize));//随机生成颜色g.setColor(getRandomColor());//画验证码g.drawString(vcode.charAt(i)+"", i*fontsize+10, fontsize+5);}//释放此图形的上下文以及它使用的所有系统资源g.dispose();returnvcodeImage;}/*** 获得旋转字体的验证码图片* @paramvcode* @paramdrawline是否画干扰线* @return*/publicBufferedImagegeneratorRotateVCodeImage(String vcode, booleandrawline){//创建验证码图片BufferedImagerotateVcodeImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics2D g2d = rotateVcodeImage.createGraphics();//填充背景色g2d.setColor(new Color(246, 240, 250));g2d.fillRect(0, 0, width, height);if(drawline){drawDisturbLine(g2d);}//在图片上画验证码for(int i = 0;i <vcode.length();i++){BufferedImagerotateImage = getRotateImage(vcode.charAt(i));g2d.drawImage(rotateImage, null, (int) (this.height * 0.7) * i, 0);}g2d.dispose();returnrotateVcodeImage;}/*** 生成验证码* @return 验证码*/public String generatorVCode(){intlen = code.length;Random ran = new Random();StringBuffersb = new StringBuffer();for(int i = 0;i <vcodeLen;i++){int index = ran.nextInt(len);sb.append(code[index]);}returnsb.toString();}/*** 为验证码图片画一些干扰线* @param g*/private void drawDisturbLine(Graphics g){Random ran = new Random();for(int i = 0;i <disturbline;i++){int x1 = ran.nextInt(width);int y1 = ran.nextInt(height);int x2 = ran.nextInt(width);int y2 = ran.nextInt(height);g.setColor(getRandomColor());//画干扰线g.drawLine(x1, y1, x2, y2);}}/*** 获取一张旋转的图片* @param c 要画的字符* @return*/privateBufferedImagegetRotateImage(char c){BufferedImagerotateImage = new BufferedImage(height, height, BufferedImage.TYPE_INT_ARGB);Graphics2D g2d = rotateImage.createGraphics();//设置透明度为0g2d.setColor(new Color(255, 255, 255, 0));g2d.fillRect(0, 0, height, height);Random ran = new Random();g2d.setFont(new Font(fontNames[ran.nextInt(fontNames.length)], fontStyles[ran.nextInt(fontStyles.length)], fontsize));g2d.setColor(getRandomColor());double theta = getTheta();//旋转图片g2d.rotate(theta, height/2, height/2);g2d.drawString(Character.toString(c), (height-fontsize)/2, fontsize+5);g2d.dispose();returnrotateImage;}/*** @return 返回一个随机颜色*/private Color getRandomColor(){Random ran = new Random();return new Color(ran.nextInt(220), ran.nextInt(220), ran.nextInt(220));}/*** @return 角度*/private double getTheta(){return ((int) (Math.random()*1000) % 2 == 0 ? -1 : 1)*Math.random();}/*** @return 验证码字符个数*/publicintgetVcodeLen() {returnvcodeLen;}/*** 设置验证码字符个数* @paramvcodeLen*/public void setVcodeLen(intvcodeLen) {this.width = (fontsize+3)*vcodeLen+10;this.vcodeLen = vcodeLen;}/*** @return 字体大小*/publicintgetFontsize() {returnfontsize;}/*** 设置字体大小* @paramfontsize*/public void setFontsize(intfontsize) {this.width = (fontsize+3)*vcodeLen+10;this.height = fontsize+15;this.fontsize = fontsize;}/*** @return 图片宽度*/publicintgetWidth() {return width;}/*** 设置图片宽度* @param width*/public void setWidth(int width) {this.width = width;}/*** @return 图片高度*/publicintgetHeight() {return height;}/*** 设置图片高度* @param height*/public void setHeight(int height) {this.height = height;}/*** @return 干扰线条数*/publicintgetDisturbline() {returndisturbline;}/*** 设置干扰线条数* @paramdisturbline*/public void setDisturbline(intdisturbline) { this.disturbline = disturbline;}}。