验证码改字体大小和大小写_course

protected void Page_Load(object sender, EventArgs e) { string str = new string; string serverCode =

怎么可以让图片验证码里面每一张的每个字母的字体和颜色随机啊_course

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; public class Picture{ //系统字符源 public static final String VA_CODES="acdefghjkmnprstuwx3457ACEFGHJKLMNQRSTUVWX"; private static Random random = new Random(); public static String generateVerifyCode(int verifySize){ return generateVerifyCode(verifySize, VA_CODES); } //自定义的字符源 public static String generateVerifyCode(int verifySize, String sources){ if(sources == null || sources.length() == 0){ sources = VA_CODES; } //无自定义字符源 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(); } public static String outputVerifyImage(int wi, int he, File outputFile, int verifySize) throws IOException{ String verifyCode = generateVerifyCode(verifySize); outputImage(wi, he, outputFile, verifyCode); return verifyCode; } public static String outputVerifyImage(int wi, int he, OutputStream os, int verifySize) throws IOException{ String verifyCode = generateVerifyCode(verifySize); outputImage(wi, he, os, verifyCode); return verifyCode; } public static void outputImage(int wi, int he, 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(wi, he, fos, code); fos.close(); } catch(IOException e){ throw e; } } public static void outputImage(int wi, int he, OutputStream os, String code) throws IOException{ int verifySize = code.length(); BufferedImage image = new BufferedImage(wi, he, 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);// g2.fillRect(0, 0, wi, he); Color c = getRandColor(200, 250); Font f =getRandomFont(); char[] charts = code.toCharArray(); for(int i=0;i<charts.length;i++){ g2.setColor(c);// g2.setFont(f); g2.fillRect(0, 2, wi, he-4); } //干扰线 Random random = new Random(); g2.setColor(getRandColor(160, 200)); for (int i = 0; i < 20; i++) { int x = random.nextInt(wi - 1); int y = random.nextInt(he - 1); int xl = random.nextInt(6) + 1; int yl = random.nextInt(12) + 1; g2.drawLine(x, y, x + xl + 40, y + yl + 20); } // 噪点 float yawpRate = 0.05f;// 噪声率 int area = (int) (yawpRate * wi * he); for (int i = 0; i < area; i++) { int x = random.nextInt(wi); int y = random.nextInt(he); int rgb = getRandomIntColor(); image.setRGB(x, y, rgb); } shear(g2, wi, he, c, f);// 扭曲图片 g2.setColor(getRandColor(100, 160)); int fontSize = he-4; Font font = getRandomFont(); 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), (wi / verifySize) * i + fontSize/2, he/2); g2.setTransform(affine); g2.drawChars(chars, i, 1, ((wi-10) / verifySize) * i + 5, he/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 Font getRandomFont() { String[] fonts = {"Gill sans", "Agency FB", "Consolas", "Comic Sans MS", "Time News Roman", "Courier New", "Arial Black", "Quantzite"}; int fontIndex = (int)Math.round(Math.random() * (fonts.length - 1)); int fontSize = (int) Math.round(Math.random() * 4 + 16); return new Font(fonts[fontIndex], Font.PLAIN, fontSize); } private static void shear(Graphics g, int w1, int h1, Color color,Font font) { shearX(g, w1, h1, color,font); shearY(g, w1, h1, color,font); } private static void shearX(Graphics g, int w1, int h1, Color color,Font font) { 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.setFont(font); 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,Font font) { 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.setFont(font); g.setColor(color); g.drawLine(i, (int) d, i, 0); g.drawLine(i, (int) d + h1, i, h1); } } } public static void main(String[] args) throws IOException{ File diy = new File("E:/521"); int w = 200, h = 80; for(int i = 0; i < 50; i++){ String verifyCode = generateVerifyCode(4); File file = new File(diy, verifyCode + ".jpg"); outputImage(w, h, file, verifyCode); } } } 这是我现在的。。求大神帮看看