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
字母就不多说了，写一个随机数就可以取得，，随机颜色，就是使用rgb()，里面的就是数字，然后生成三个0-255之间的随机数，作为参数，就能得到随机的颜色
现在的问题是每一张验证码之间颜色字体不一样，但是同一张验证码的字母之间是一样的
0.0萌新表示学习到了东西！