Java code verification tools

 

PIN code means the code as follows:

 

javax.imageio.ImageIO Import; 
Import in java.awt *;. 
Import java.awt.image.BufferedImage; 
Import java.awt.image.RenderedImage; 
Import java.io.FileOutputStream; 
Import a java.io.OutputStream; 
Import Classes in java.util .HashMap; 
Import a java.util.Map; 
Import java.util.Random; 

/ ** 
* @title codes tools 
* @author Boat 
* / 
public class ImageUtil { 

    Private static int width = 90; // definition of the image width 
    private static int height = 30; // definition of the image height 

    // code verifiers. 5 a set of 
   / * private static int codeCount = 5 ; the number of codes displayed on the image // definition of 
    private static int xx = 13; * / 

    // four codes set 
    private static int codeCount = 4; // number of codes defined on the image display
    private static int xx = 15;

    private static int codeY = 23;
    private static int fontHeight = 22;

    private static char[] codeSequence = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t', 'u','v','w','x','y','z', '0', '1 ',' 2 ',' 3 ',' 4 ',' 5 ',' 6 ',' 7 ',' 8 ',' 9 '};         // definition of the image buffer    public static the Map <String, Object> generateCodeAndPic () {     * /     * @return     *     * codePic of codes generated BufferedImage object     * to generate a verification code code     * generate a map set

    / *








        = New new buffImg the BufferedImage the BufferedImage (width, height, BufferedImage.TYPE_INT_RGB); 
        // buffImg.createGraphics the Graphics2D Gd = (); 
        // the Graphics2D Gd = (the Graphics2D) buffImg.getGraphics (); 
        Graphics buffImg.getGraphics Gd = (); 

        / / class to create a random number generator 
        the random random new new = the random (); 

        // fill the image white 
        gd.setColor (Color.WHITE); 
        gd.fillRect (0, 0, width, height); 

        // create font, the font size should be set according to the height of the picture. 
        New new font font = font ( "Arial", Font.BOLD, FontHeight); 

        // set the font. 
        gd.setFont (font); 

        // draw the border. 
        //gd.setColor(Color.LIGHT_GRAY); 
        gd.setColor (getRandomColor ());
        gd.drawRect (0, 0, width -. 1, height -. 1); 

        // randomly generated interference line 40, the authentication code so that the image is not easy to be detected other programs. 
        gd.setColor (getRandomColor ()); 

        for (int I = 0; I <30; I ++) { 
            int X = random.nextInt (width); 
            int random.nextInt Y = (height); 
            int random.nextInt XL = ( 12 is); 
            int = YL random.nextInt (12 is); 
            gd.drawLine (X, Y, X + XL, YL + Y); 
        } 

        // randomCode for holding randomly generated codes to authenticate the user upon login. 
        = New new randomCode the StringBuffer the StringBuffer (); 

        // number codeCount randomly generated codes. 
        for (int I = 0; I <codeCount; I ++) { 

            // get the digital codes generated at random.
            String.valueOf code = String (codeSequence [random.nextInt (codeSequence.length)]); 

            // color code will be randomly generated into the image drawing. 
            gd.setColor (getRandomColor ()); 

            gd.drawString (code, (I +. 1) * XX,, codeY); 

            // four combined random number generated. 
            randomCode.append (code); 
        } 
        the Map <String, Object> = new new the HashMap Map <String, Object> (); 
        // store codes 
        map.put ( "code", randomCode); 
        // put the generated codes BufferedImage Object 
        map.put ( "codePic", buffImg); 
        return Map; 
    } 

    / ** 
     * color randomly 
     * / 
    public static color getRandomColor () { 
        the random new new RAN = the random ();
        int red = ran.nextInt(256);
        int green = ran.nextInt(256);
        int blue = ran.nextInt(256);
        Color color = new Color(red,green,blue);
        return color;
    }

    // 获取验证码
    public static Map<String,Object> getCheckCodePic(){
        return ImageUtil.generateCodeAndPic();
    }

    public static void main(String[] args) throws Exception {
        //创建文件输出流对象
        OutputStream out = new FileOutputStream("d://"+System.currentTimeMillis()+".jpg");
        Map<String,Object> map = ImageUtil.generateCodeAndPic();
        ImageIO.write((RenderedImage) map.get("codePic"), "jpeg", out);
        System.out.println ( "Code verification values:" + as map.get ( "code")); 
    } 

}

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