Using Java to generate a letter-verification code _java

This example for you to share the Java generated letter verification code for your reference, the specific content as follows

Import Java.awt.BasicStroke;
Import Java.awt.Color;
Import Java.awt.Font;
Import Java.awt.Graphics2D;
Import Java.awt.image.BufferedImage;
Import java.io.IOException;
Import Java.io.OutputStream;

Import Java.util.Random;


Import Javax.imageio.ImageIO;
  public class Verifycode {//Picture width high private int w=70;
  private int h=35;
  Private Random r=new Random ();
  Private string[] fontnames={"song Body", "XXFarEastFont-Arial", "bold", "Microsoft Ya Hei", "italics _gb2312"};
  Private String codes= "234567890qwertyuipasdfghjkzxcvbnmQWERTYUIPASDFGHJKZXCVBNM";
  Private color Bgcolor=new color (255,255,255);
  private String text;
    Generate random color private color randomcolor () {int red=r.nextint (150);
    int Green=r.nextint (150);
    int Blue=r.nextint (150);
    return new Color (red, green, blue);
    //Generate random Font private font randomfont () {int index=r.nextint (fontnames.length);
    String Fontname=fontnames[index]; int Style=r.nextint (4);//0 No 1 Bold 2 Italic 3 thick + oblique int size=r.nextint (5) +24; Generate random Font size 24~28 return new font (fontName, style, size);
    }//Interference line private void Drowline (BufferedImage image) {//Generate 4 interference line int num=4;
    Graphics2D bi= (graphics2d) image.getgraphics ();
      for (int i = 0; i < num; i++) {int x1=r.nextint (w);
      int X2=r.nextint (w);
      int Y1=r.nextint (h);
      int Y2=r.nextint (h);
      Bi.setstroke (New Basicstroke (1.5F));
    Bi.setcolor (Color.Blue);//Interference Line Color bi.drawline (x1,y1,x2,y2);
    }///randomly generate a character private char Randomchar () {int index=r.nextint (codes.length ());
  Return Codes.charat (index); }//Picture buffer private BufferedImage createimage () {bufferedimage image=new bufferedimage (W, H, Bufferedimage.type_int_
    BGR);
    Graphics2D bi= (graphics2d) image.getgraphics ();
    Bi.setcolor (This.bgcolor);
    Bi.fillrect (0, 0, W, h);
  return image;
    //Generate Picture Public bufferedimage getImage () {bufferedimage image=createimage ();
    Graphics2D bi= (graphics2d) image.getgraphics ();
    StringBuilder sb=new StringBuilder (); for (int i = 0; I <4;
      i++) {String String=randomchar () + "";
      Sb.append (string);
      Each character occupies a picture of 1/4 wide float X=I*1.0F*W/4;
      Random font format bi.setfont (Randomfont ());
      Bi.setcolor (Randomcolor ());
    Write the words in the appropriate place (h-6 refers to the picture from the bottom 6 height) bi.drawstring (string, x, h-6);
    } this.text=sb.tostring ();
    Drowline (image);
  return image;
  //Returns the resulting font public String GetText () {return text; ///write the picture to the specified location public static void output (BufferedImage image,outputstream out) {try {imageio.write (image, "J
    PG ", out);
    catch (IOException e) {e.printstacktrace ();

 }
  }
}

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