Java Implementation Simple Verification code (to be enhanced)

Package com.xxx;

Import Java.awt.Color;
Import Java.awt.Font;
Import Java.awt.Graphics2D;
Import Java.awt.image.BufferedImage;
Import java.io.FileNotFoundException;
Import Java.io.FileOutputStream;
Import java.io.IOException;

Import Javax.imageio.ImageIO;

Import Org.junit.Test;

public class Identifyingcode {

Private final int WIDTH = 70;
Private final int HEIGHT = 30;
Private final byte[] Background_color = new byte[]{127, 127, 127};
Private final String Font_style = "Microsoft Jas Black";
Private final char[] Idetifying_code = new char[]{' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ', ' A ', ' B ', ' C ', ' d '};
Private final int code_length= 4;
Private final int font_size = 17;

Generate a verification code map
Public BufferedImage Createidentifyingcode () {
StringBuilder sb = new StringBuilder ();

BufferedImage image = New BufferedImage (WIDTH, HEIGHT, BUFFEREDIMAGE.TYPE_3BYTE_BGR);
Get brushes
Graphics2D g = image.creategraphics ();
Get the color of the previous brush
Color color = G.getcolor ();

Draw a picture border
This.drawimagecheek (g);
This.drawcamouflageline (g, 8);
Set Background color
G.setbackground (New Color (background_color[0]+128, background_color[1]+128, background_color[2]+128));
Set font size and style
G.setfont (New Font (Font_style, Font.plain, (int) (this). Font_size)) {
Private static final long serialversionuid = 1L;});

Adding validation characters to the diagram
for (int i=0; i<code_length; i++) {
Set Brush color
G.setcolor (This.randomcolor ());
Get random characters
Char charcode = idetifying_code[this.randomnumber (0, idetifying_code.length-1)];
Sb.append (CharCode);
Write characters to a picture
System.out.println (SB);
G.rotate (This.randomnumber (45, 135));
g.DrawString ("" +charcode, width/5* (i+1) -5, (this. font_size) +this.randomnumber (0, this. FONT_SIZE/2));

}

try {
Imageio.write (image, "JPEG", New FileOutputStream ("D:/11.jpeg"));
} catch (FileNotFoundException e) {
TODO auto-generated Catch block
E.printstacktrace ();
} catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
return image;
}

/**
* Generate a color according to the random three colors
*
* @return Color
*/
Public Color Randomcolor () {
int min = 0;
int max = 255;
int red = randomnumber (min, max);
int green = randomnumber (min, max);
int yellow = randomnumber (min, max);
return new Color (red, green, yellow);
}

public void Drawcamouflageline (graphics2d g, int quantity) {
Color Oldcolor = G.getcolor ();
for (int i=0; i<quantity; i++) {
G.setcolor (This.randomcolor ());
G.drawline (This.randomnumber (0, this. WIDTH), This.randomnumber (0, this. HEIGHT), This.randomnumber (0, this. WIDTH), This.randomnumber (0, this. HEIGHT));
}
G.setcolor (Oldcolor);
}

/**
* Draw inside border of picture
*
* @param g brushes
*/
public void Drawimagecheek (graphics2d g) {
Color Oldcolor = G.getcolor ();
G.setcolor (New Color (255, 255, 255));
G.drawline (0, 0, this. WIDTH-2, 0);
G.drawline (0, 0, 0, this. HEIGHT-2);
G.drawline (0, this. HEIGHT-2, this. WIDTH-2, this. HEIGHT-2);
G.drawline (this. WIDTH-2, 0, this. WIDTH-2, this. HEIGHT-2);
G.setcolor (Oldcolor);
}

public int randomnumber (int min, int max) {
return (int) ((Math.random () * (max-min+1)) +min);

}

public static void Main (string[] args) {
New Identifyingcode (). Createidentifyingcode ();
}
}

One of the issues to be solved: the background is not set correctly

To be optimized: validation codes in the verification diagram need to be rotated to increase program recognition difficulty

This is the effect of the present

Java Implementation Simple Verification code (to be enhanced)