Java Generate image Verification code 2

Photo class

 Packagecom.baowei.utils;ImportJava.awt.Color;ImportJava.awt.Font;ImportJava.awt.Graphics;ImportJava.awt.image.BufferedImage;Importjava.io.IOException;ImportJava.util.Random;ImportJavax.imageio.ImageIO;ImportJavax.servlet.http.HttpServletResponse; Public classPhoto {Private Static Final intwidth = 120; Private Static Final intHeight = 25; Privatehttpservletresponse response; PrivateString Randomdata = "";  PublicPhoto (httpservletresponse response) { This. Response =response; }     Public voidCreateImage ()throwsIOException {//1. Create a picture inside the memoryBufferedImage Bimage =Newbufferedimage (width, height, bufferedimage.type_int_rgb); //2.1 Getting picturesGraphics g =Bimage.getgraphics (); //2.2 Setting the background color of the pictureSetBackground (g); //3. Set picture BorderSetBorder (g); //4. Set the image interference lineSetline (g); //5. Write data to picturesSetrandomdata (g); //6. Write the picture to the clientResponse.setcontenttype ("Image/jpeg"); Imageio.write (Bimage,"JPG", Response.getoutputstream ()); }     Public voidSetBackground (Graphics g) {color color=G.getcolor ();        G.setcolor (Color.White); G.fillrect (0, 0, width, height);    G.setcolor (color); }     Public voidSetBorder (Graphics g) {color color=G.getcolor ();        G.setcolor (Color.Blue); G.drawrect (1, 1, width-2, height-2);    G.setcolor (color); }     Public voidSetline (Graphics g) { for(inti = 0; I < 4; i++) {            //The x, y obtained here should be associated with the height of the image above            intX1 =NewRandom (). Nextint (width); intx2 =NewRandom (). Nextint (width); intY1 =NewRandom (). Nextint (height); inty2 =NewRandom (). Nextint (height); Color Color=G.getcolor ();            G.setcolor (Color.green);            G.drawline (x1, y1, x2, y2);        G.setcolor (color); }    }     Public voidSetrandomdata (Graphics g) {//get Random data//String data = "";         for(inti = 0; I < 4; i++) {Randomdata+=NewRandom (). Nextint (10) + ""; }        //set the font and color of your dataColor color =G.getcolor ();        G.setcolor (color.red); G.setfont (NewFont ("Arial", Font.Bold, 20)); g.DrawString (Randomdata,20, 20);    G.setcolor (color); }         Publicstring Getrandomdata () {string data[]= Randomdata.split (""); String Returndata= "";  for(inti = 0; i < data.length; i++) {Returndata+=Data[i]; }                returnReturndata; }}

DEMO01 servlet for test purposes

 PackageCom.baowei.servlet;ImportJava.awt.Color;ImportJava.awt.Font;ImportJava.awt.Graphics;ImportJava.awt.image.BufferedImage;Importjava.io.IOException;ImportJava.util.Random;ImportJavax.imageio.ImageIO;Importjavax.servlet.ServletException;ImportJavax.servlet.http.HttpServlet;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse;Importjavax.servlet.http.HttpSession;ImportCom.baowei.utils.Photo; Public classDemo01extendsHttpServlet { Public voiddoget (httpservletrequest request, httpservletresponse response)throwsservletexception, IOException {doPost (request, response); }     Public voidDoPost (httpservletrequest request, httpservletresponse response)throwsservletexception, IOException {response.setheader ("Pragma", "No-cache"); Response.setheader ("Cache-control", "No-cache"); Response.setdateheader ("Expires", 0); Response.setcontenttype ("Image/jpeg"); Photo PT=NewPhoto (response);        Pt.createimage ();        System.out.println (Pt.getrandomdata ()); String Data=Pt.getrandomdata (); //Deposit Session Sessions//HttpSession session = Request.getsession (true); //Session.setattribute ("Data", data);Getservletcontext (). SetAttribute ("Data"), data); }}

Java Generate image Verification code 2