使用java生成字母验证码
本文实例为大家分享了java生成字母验证码的具体代码,供大家参考,具体内容如下
importjava.awt.BasicStroke; importjava.awt.Color; importjava.awt.Font; importjava.awt.Graphics2D; importjava.awt.image.BufferedImage; importjava.io.IOException; importjava.io.OutputStream; importjava.util.Random; importjavax.imageio.ImageIO; publicclassVerifyCode{ //图片宽高 privateintw=70; privateinth=35; privateRandomr=newRandom(); privateString[]fontNames={"宋体","华文楷体","黑体","微软雅黑","楷体_GB2312"}; privateStringcodes="234567890qwertyuipasdfghjkzxcvbnmQWERTYUIPASDFGHJKZXCVBNM"; privateColorbgColor=newColor(255,255,255); privateStringtext; //生成随机颜色 privateColorrandomColor(){ intred=r.nextInt(150); intgreen=r.nextInt(150); intblue=r.nextInt(150); returnnewColor(red,green,blue); } //生成随机字体 privateFontrandomFont(){ intindex=r.nextInt(fontNames.length); StringfontName=fontNames[index]; intstyle=r.nextInt(4);//0无1粗体2斜体3粗+斜 intsize=r.nextInt(5)+24;//生成随机字号24~28 returnnewFont(fontName,style,size); } //干扰线 privatevoiddrowLine(BufferedImageimage){ //生成4条干扰线 intnum=4; Graphics2Dbi=(Graphics2D)image.getGraphics(); for(inti=0;i<num;i++){ intx1=r.nextInt(w); intx2=r.nextInt(w); inty1=r.nextInt(h); inty2=r.nextInt(h); bi.setStroke(newBasicStroke(1.5F)); bi.setColor(Color.BLUE);//干扰线色 bi.drawLine(x1,y1,x2,y2); } } //随机生成一个字符 privatecharrandomChar(){ intindex=r.nextInt(codes.length()); returncodes.charAt(index); } //图片缓冲区 privateBufferedImagecreateImage(){ BufferedImageimage=newBufferedImage(w,h,BufferedImage.TYPE_INT_BGR); Graphics2Dbi=(Graphics2D)image.getGraphics(); bi.setColor(this.bgColor); bi.fillRect(0,0,w,h); returnimage; } //生成图片 publicBufferedImagegetImage(){ BufferedImageimage=createImage(); Graphics2Dbi=(Graphics2D)image.getGraphics(); StringBuildersb=newStringBuilder(); for(inti=0;i<4;i++){ Stringstring=randomChar()+""; sb.append(string); //每个字符占图片1/4宽 floatx=i*1.0F*w/4; //随机字体格式 bi.setFont(randomFont()); bi.setColor(randomColor()); //把字写在图片适当处(h-6指图片距底部6个高度) bi.drawString(string,x,h-6); } this.text=sb.toString(); drowLine(image); returnimage; } //返回得到的字体 publicStringgetText(){ returntext; } //把图片写入指定位置 publicstaticvoidoutput(BufferedImageimage,OutputStreamout){ try{ ImageIO.write(image,"JPG",out); }catch(IOExceptione){ e.printStackTrace(); } } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持毛票票。