java captcha generator

=R.nextint (Codes.length ()); returnCodes.charat (index); } Privatebufferedimage createimage () {bufferedimage image=NewBufferedImage (W, H, Bufferedimage.type_int_rgb); Graphics2D G2=(graphics2d) image.getgraphics (); G2.setcolor ( This. BgColor); G2.fillrect (0, 0, W, h); returnimage; } Publicbufferedimage getImage () {bufferedimage image=createimage (); Graphics2D G2=(graphics2d) image.getgraphics (); StringBuilder SB=NewStringBuilder (); for(inti = 0; I ) {String s= Randomch

Verification code Generator is a simple, easy-to-use, functional Verification code generation tool, users can use the tool to easily generate verification code. Captcha Generator Feature Description: 1, Verification code length: the number of characters generated verification code, the default is 4; 2, background point density: that is, in the background to gene

Java Web code generator, which focuses on Java Web project general purpose code generator and Java Web Code Generator This project is a general code generator for the javaWEB project. j

Defaulttextcreatorkaptcha. Textproducer.char.string Verification Code text character content range default to abcde2345678gfynmnpwxkaptcha.textproducer.char.length captcha text character length Default to 5kaptcha.textproducer.font.names captcha text font style default to New font ("Arial", 1, fontSize), New Font ("Courier", 1, FontSize) KAPTC Ha.textproducer.font.size Verification Code text character si

));G.drawrect (0, 0, width, height);G.setfont (Mfont);G.setcolor (New Color (252, 252, 252));This variable is used to save the system-generated random variable stringString SRand = "";int Colorr = Random.nextint (200);int colorg = Random.nextint (200);int colorb = Random.nextint (200);for (int i = 0; i Get a random stringString tmp = Getrandomchar ();SRand + = tmp;Add a system-generated random string to the pictureG.setcolor (New Color (Colorr, colorg, Colorb));g.DrawString (TMP, * i + 10, 20);}

. The method is based on pixel-level operation, the foreground and background content on the pixel also have certain requirements, the interference line than the foreground content in the stroke to be thin, this is very important, is the main essence of the method, through the operation of the pixel can be achieved to remove the interference line and noise effect, Believe that someone who knows a bit of image processing should already know what's going on.These are just a little bit of my origin

+ = s;}}Requestmap.put ("Cookie", Requestmap.get ("cookie") + cookie);in = Conn.getinputstream ();BufferedImage bi = imageio.read (in);File F = new file ("Check_img.jpg");Imageio.write (BI, "JPG", f);return F.getabsolutepath ();} else {System.out.println ("Download code image failed!") ");}} catch (Exception e) {E.printstacktrace ();}//using the finally block to close the input streamfinally {try {if (in = null) {In.close ();}} catch (Exception E2) {E2.printstacktrace ();}}return null;}How to o

[] json = jsonobj.tostring (). GetBytes ("UTF-8"); theResp.setcontenttype ("Text/plain;chartset=utf-8"); +Resp.setheader ("Cache-control", "No-cache"); -Resp.setheader ("Expires", "0"); theResp.setintheader ("Content-length", json.length);BayiServletoutputstream Responseoutputstream =Resp.getoutputstream (); the Responseoutputstream.write (JSON); the //The following closes the input stream! - Responseoutputstream.flush (); - responseoutputstream.close (); the //Get page

]); } }); Randomwordfactory WF=Newrandomwordfactory (); Wf.setcharacters ("23456789abcdefghigkmnpqrstuvwxyzABCDEFGHIGKLMNPQRSTUVWXYZ"); Wf.setmaxlength (4); Wf.setminlength (4); Cs.setwordfactory (WF); } Public StaticString Generate (HttpServletResponse response)throwsioexception{Switch(Random.nextint (5)) { Case0: Cs.setfilterfactory (Newcurvesripplefilterfactory (Cs.getcolorfactory ())); Break; Case1: Cs.setfilterfactory (Newmarbleripplefilterfactory ()); Br

For details, please refer to:http://blog.csdn.net/fengshizty/article/details/43086833Follow the above blog address to download the generator dependency package:Here is my configuration file:XML version= "1.0" encoding= "UTF-8"?>DOCTYPE generatorconfiguration Public "-//mybatis.org//dtd mybatis Generator Configuration 1.0//en" "/http Mybatis.org/dtd/mybatis-generator