本文實(shí)例為大家分享了java網(wǎng)頁驗(yàn)證碼的實(shí)現(xiàn)代碼,供大家參考,具體內(nèi)容如下
成都創(chuàng)新互聯(lián)公司致力于互聯(lián)網(wǎng)網(wǎng)站建設(shè)與網(wǎng)站營銷,提供網(wǎng)站設(shè)計(jì)、網(wǎng)站制作、網(wǎng)站開發(fā)、seo優(yōu)化、網(wǎng)站排名、互聯(lián)網(wǎng)營銷、微信小程序定制開發(fā)、公眾號商城、等建站開發(fā),成都創(chuàng)新互聯(lián)公司網(wǎng)站建設(shè)策劃專家,為不同類型的客戶提供良好的互聯(lián)網(wǎng)應(yīng)用定制解決方案,幫助客戶在新的全球化互聯(lián)網(wǎng)環(huán)境中保持優(yōu)勢。Servlet:
package cn.bdqn.servlet; import javax.imageio.ImageIO; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.awt.*; import java.awt.font.ImageGraphicAttribute; import java.awt.image.BufferedImage; import java.io.IOException; import java.util.Random; @WebServlet(name = "Servlet",urlPatterns = "/yanCode") public class Servlet extends HttpServlet { public void doPost(javax.servlet.http.HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request,response); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String s="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; Random random = new Random(); int width=500; int height=50; BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB); Graphics graphics = image.getGraphics();//相當(dāng)于畫筆 //畫背景 graphics.setColor(Color.gray); graphics.fillRect(0,0,width,height); graphics.setColor(Color.black); for (int i = 0; i <4 ; i++) { int index = random.nextInt(s.length()); String c = s.substring(index, index + 1); graphics.drawString(c,width/5*(i+1),15); } ImageIO.write(image,"jpg",response.getOutputStream()); } }
網(wǎng)頁標(biāo)題:java實(shí)現(xiàn)網(wǎng)頁驗(yàn)證碼功能-創(chuàng)新互聯(lián)
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