//圖片數(shù)據(jù)表示,也用來表示字塊package pay365;import java.awt.image.BufferedImage;import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.IOException;import java.util.ArrayList;import java.util.Iterator;public class ImageData {    public int[][] data;    public int w;    public int h;    public char code;        public ImageData() {    }        public ImageData(BufferedImage bi) {        this(bi,new WhiteFilter());    }    public ImageData(BufferedImage bi,Filter filter) {        h = bi.getHeight();        w = bi.getWidth();        data = new int[h][w];        for (int i = 0; i < h; i++) {            for (int j = 0; j < w; j++) {                int p = bi.getRGB(j, i);                data[i][j] = p;            }        }        filter.doFilter(data);    }    public ImageData[] split() {        ArrayList list = new ArrayList();        ImageIterator ite = new ImageIterator(this);        while (ite.hasNext()) {            list.add(ite.next());        }        return (ImageData[]) list.toArray(new ImageData[0]);    }    int skipEmpty(int begin, boolean isX, int value) {        if (isX) {            for (int i = begin; i < w; i++) {                for (int j = 0; j < h; j++) {                    if (data[j][i] != value) {                        return i;                    }                }            }            return -1;        } else {            for (int i = begin; i < h; i++) {                for (int j = 0; j < w; j++) {                    if (data[i][j] != value) {                        return i;                    }                }            }            return -1;        }    }    int skipEntity(int begin, boolean isX, int value) {        if (isX) {            for (int i = begin; i < w; i++) {                for (int j = 0; j < h; j++) {                    if (data[j][i] == value) {                        break;                    }                    if (j == h - 1)                        return i;                }            }            return -1;        } else {            for (int i = begin; i < h; i++) {
                            for (int j = 0; j < w; j++) {                    if (data[i][j] == value) {                        break;                    }                    if (j == w - 1)                        return i;                }            }            return -1;        }    }    class ImageIterator implements Iterator {        int x;        ImageData ia;        ImageData next;        public ImageIterator(ImageData ia) {            this.ia = ia;        }        public boolean hasNext() {            if (next != null)                return true;            next = getNext();            return next != null;        }        ImageData getNext() {            int x1 = skipEmpty(x, true, 0);            if (x1 == -1) {                return null;            }            int x2 = skipEntity(x1, true, 1);            if (x2 == -1) {                x2 = w;            }            x = x2;            int y1 = skipEmpty(0, false, 0);            if (y1 == -1)                return null;            int y2 = skipEntity(y1, false, 1);            if (y2 == -1)                y2 = h;            return ia.clone(x1, y1, x2 - x1, y2 - y1);        }        public Object next() {            ImageData temp = next;            next = null;            return temp;        }        public void remove() {        }    }    ImageData clone(int x, int y, int w0, int h0) {        ImageData ia = new ImageData();        ia.w = w0;        ia.h = h0;        ia.data = new int[ia.h][ia.w];        for (int i = 0; i < h0; i++) {            for (int j = 0; j < w0; j++) {                ia.data[i][j] = data[i + y][j + x];            }        }        return ia;    }    public void show() {        System.out.PRintln();        for (int i = 0; i < h; i++) {            for (int j = 0; j < w; j++) {                System.out.print((data[i][j] == 1 ? "1" : " ") + "");            }            System.out.println();        }        System.out.println();    }    public int hashCode() {        int code = w ^ h;        int count = 0;        for (int i = 0; i < h; i++) {            for (int j = 0; j < w; j++) {                if (data[i][j] == 1)                    count++;            }        }        code ^= count;        return code;    }    public boolean equals(Object obj) {        if (this == obj) {            return true;        }        if (obj instanceof ImageData) {            ImageData o = (ImageData) obj;            if (o.h != h)                return false;            if (o.w != w)                return false;            for (int i = 0; i < h; i++) {                for (int j = 0; j < w; j++) {                    if (o.data[i][j] != data[i][j])                        return false;                }            }            return true;        } else {            return false;
                    }    }    public static ImageData[] decodeFromFile(String path) throws IOException {        BufferedReader reader = new BufferedReader(new FileReader(                new File(path)));        String line;        ArrayList list = new ArrayList();        while ((line = reader.readLine()) != null) {            ImageData ia = decode(line);            if (ia != null) {                list.add(ia);            }        }        return (ImageData[]) list.toArray(new ImageData[0]);    }    public static ImageData decode(String s) {        String[] ss = s.split("http://,", 4);        if (ss.length != 4)            return null;        if (ss[0].length() != 1)            return null;        ImageData ia = new ImageData();        ia.code = ss[0].charAt(0);        ia.w = Integer.parseInt(ss[1]);        ia.h = Integer.parseInt(ss[2]);        if (ss[3].length() != ia.w * ia.h) {            return null;        }        ia.data = new int[ia.h][ia.w];        for (int i = 0; i < ia.h; i++) {            for (int j = 0; j < ia.w; j++) {                if (ss[3].charAt(i * ia.w + j) =='1') {                    ia.data[i][j] = 1;                } else {                    ia.data[i][j] = 0;                }            }        }        return ia;    }    public String encode() {        StringBuffer sb = new StringBuffer();        sb.append(code).append(",");        sb.append(w).append(",");        sb.append(h).append(",");        for (int i = 0; i < h; i++) {            for (int j = 0; j < w; j++) {                if (data[i][j] == 1) {                    sb.append('1');                } else {                    sb.append('0');                }            }        }        return sb.toString();    }}//像素過濾接口package pay365;public interface Filter {        void doFilter(int[][] data);}//package pay365;public abstract class AbstractFilter  implements Filter {    public void doFilter(int[][] data) {        int h = data.length;        if (h<=0)            return;        int w = data[0].length;        if (w<=0)            return ;        for(int i=0;i< h;i++) {            for(int j=0;j< w;j++) {                data[i][j] = filter(data[i][j]);            }        }    }        protected abstract int filter(int p);}//過濾csdn驗證碼的過濾器package pay365;public class CsdnFilter extends AbstractFilter {    protected int filter(int p) {        return isNotWhite(p)?1:0;    }    private boolean isNotWhite(int p) {        boolean b = (p & 0×0ff) == 255 && (p >> 8 & 0×0ff) == 255                && (p >> 16 & 0xff) == 255;        return !b;    }}//過濾前景色為白色的過濾器package pay365;public class WhiteFilter extends AbstractFilter {        protected int filter(int p) {        if (isWhite(p)) {            return 1;        }        else {            return 0;
                    }    }    private boolean isWhite(int p) {        return (p & 0x0ff) > 240 && (p >> 8 & 0x0ff) > 240                && (p >> 16 & 0xff) > 240;    }}//模板創(chuàng)建類package pay365;import java.awt.image.BufferedImage;import java.io.BufferedReader;import java.io.File;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.URL;import java.util.HashSet;import java.util.Iterator;import java.util.Set;import javax.imageio.ImageIO;public class TemplateCreator {    /**     * @param args     */    public static void main(String[] args) throws Exception {        Set set = new HashSet();                String url = "http://passport.csdn.net/member/ShowEXPwd.aspx";        String filterClazz = "pay365.CsdnFilter";        if (args.length>=1) {            url = args[0];        }        if (args.length>=2) {            filterClazz = args[1];        }        Filter csdnFilter = (Filter) Class.forName(filterClazz).newInstance();        for (int i = 1; i < 10; i++) {            URL u = new URL(url);            BufferedImage bi = ImageIO.read(u);            ImageData ia2 = new ImageData(bi,csdnFilter);            ImageData[] ii = ia2.split();            for (int x = 0; x < ii.length; x++) {                ImageData imageArr = ii[x];                set.add(imageArr);            }            // set.addAll(Arrays.asList(ia2.split()));        }        System.out.println(set.size());        for (Iterator iter = set.iterator(); iter.hasNext();) {            ImageData ele = (ImageData) iter.next();            ele.show();            System.out.print("char:");            String s = readLine();            if (s.length() == 1) {                ele.code = s.charAt(0);            }        }                PrintWriter pw = new PrintWriter(new File("template.data"));        for (Iterator iter = set.iterator(); iter.hasNext();) {            ImageData ele = (ImageData) iter.next();            pw.println(ele.encode());        }        pw.flush();        pw.close();    }    private static BufferedReader reader = new BufferedReader(            new InputStreamReader(System.in));    private static String readLine() {        try {            return reader.readLine();        } catch (Exception e) {            e.printStackTrace();            return "";        }    }}//識別類package pay365;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.net.URL;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import javax.imageio.ImageIO;public class Recognize2 {    static String url = "http://passport.csdn.net/member/ShowExPwd.aspx";    static Filter filter;
                public static void main(String[] args) throws Exception {        if (args.length >= 1) {            url = args[0];        }        String filterClazz = "pay365.CsdnFilter";        if (args.length >= 2) {            filterClazz = args[1];        }        filter = (Filter) Class.forName(filterClazz).newInstance();        int total = 10;        int count = 0;        for (int i = 0; i < total; i++) {            boolean b = recognize(i);            if (b)                count++;        }        System.out.println("rate:" + (count * 1.0 / total * 100) + "%100");    }    /**     * @throws IOException     */    private static boolean recognize(int num) throws IOException {        BufferedImage bi = ImageIO.read(new URL(url));        ImageIO.write(bi,"png",new File(num+".png"));        ImageData ia2 = new ImageData(bi, filter);        ImageData[] ii = ia2.split();        ArrayList list = new ArrayList();        ImageData[] template = ImageData.decodeFromFile("template.data");        HashMap map = new HashMap();        for (int i = 0; i < template.length; i++) {            map.put(template[i], new Character(template[i].code));        }        for (int x = 0; x < ii.length; x++) {            ImageData imageArr = ii[x];            if (imageArr.w > 15)                continue;            Character c = (Character) map.get(imageArr);            if (c != null) {                list.add(c);            }        }        String s = "";        System.out.print(num + ":");        for (Iterator iter = list.iterator(); iter.hasNext();) {            Character c = (Character) iter.next();            s += c;            System.out.print(c);        }        System.out.println();        return s.length() != 0;    }}

（出處：http://m.survivalescaperooms.com）