java手机验证码代码怎么写 _验证码

1.验证码部分的java代码怎么写package com.bbs.servlet; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.image.BufferedImage; import java.io.IOException; import java.io.OutputStream; import java.io.PrintWriter; import java.util.Random; import javax.imageio.ImageIO; import javax.servlet.ServletException; import javax.servlet..sun.image.codec.jpeg.JPEGCodec; import com.sun.image.codec.jpeg.JPEGImageEncoder; public class Image extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("image/jpeg"); OutputStream out = response.getOutputStream(); response.setHeader("Pragma","No-cache"); response.setHeader("Cache-Control","no-cache"); response.setDateHeader("Expires", 0); int width = 60, height = 20; BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)； // 获取图形上下文 Graphics g = image.getGraphics（)； // 生成随机类 Random random = new Random（)； // 设定背景色 g.setColor(getRandColor(200, 250)); g.fillRect(0, 0, width, height)； // 设定字体 g.setFont(new Font("Times New Roman", Font.PLAIN, 18)）； // 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到 g.setColor(getRandColor(180, 200)); for (int i = 0; i < 155; i++) { int x = random.nextInt(width); int y = random.nextInt(height); int xl = random.nextInt(12); int yl = random.nextInt(12); g.drawLine(x, y, x + xl, y + yl)； } // 取随机产生的认证码（4位数字） String sRand =setRandValue(request); if(sRand!=null) for (int i = 0; i < sRand.length(); i++) { g.setColor(new Color(20 + random.nextInt(200), 20 + random .nextInt(200), 20 + random.nextInt(200)））； // 调用函数出来的颜色相同，可能是因为种子太接近，所以只能直接生成 g.drawString(sRand.charAt(i) + "", 13 * i + 6, 16); } JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(image)； // 图象生效 g.dispose（)； // 输出图象到页面 // ImageIO.write(image, "JPG", response.getOutputStream()); out.flush(); out.close(); } Color getRandColor(int fc, int bc) {// 给定范围获得随机颜色 Random random = new Random(); if (fc > 255) fc = 255; if (bc > 255) bc = 255; int r = fc + random.nextInt(bc - fc); int g = fc + random.nextInt(bc - fc); int b = fc + random.nextInt(bc - fc); return new Color(r, g, b); } //48-57对应0-9;65-90对应A-Z;97-122对应a-z; String setRandValue(HttpServletRequest request) { Random random = new Random(); String sRand = ""； //这里是生成验证码的位数 for (int i = 0; i < 4; i++) { char c = 0; int k = random.nextInt(3); switch (k) { case 0: c = (char) (random.nextInt(10) + 48); break; case 1: c = (char) (random.nextInt(26) + 65); break; case 2: c = (char) (random.nextInt(26) + 97); } sRand += c; } request.getSession().setAttribute("rands", sRand); return sRand; } } 。
2.手机短信验证码java接口怎么写【java手机验证码代码怎么写】这个首先你要确定一下短信平台，他们会给你提供短信实现的接口文档。
比如：public static String doPost(String reqUrl, Map parameters, String recvEncoding) { HttpURLConnection url_con = null; String responseContent = null; try { StringBuffer params = new StringBuffer(); Iterator iter = parameters.entrySet().iterator(); while (iter.hasNext()) { Map.Entry element = (Map.Entry)iter.next(); params.append(element.getKey().toString()); params.append("="); params.append(URLEncoder.encode(element.getValue().toString(), requestEncoding)); params.append("&"); } if (params.length() > 0) { params = params.deleteCharAt(params.length() - 1); } URL url = new URL(reqUrl); url_con = (HttpURLConnection)url.openConnection(); url_con.setRequestMethod("POST"); System.setProperty("sun.net.client.defaultConnectTimeout", String.valueOf(connectTimeOut)); System.setProperty("sun.net.client.defaultReadTimeout", String.valueOf(readTimeOut)); url_con.setDoOutput(true); byte[] b = params.toString().getBytes(); url_con.getOutputStream().write(b, 0, b.length); url_con.getOutputStream().flush(); url_con.getOutputStream().close(); InputStream in = url_con.getInputStream(); BufferedReader rd = new BufferedReader( new InputStreamReader(in, recvEncoding)); String tempLine = rd.readLine(); StringBuffer tempStr = new StringBuffer(); String crlf = System.getProperty("line.separator"); while (tempLine != null) { tempStr.append(tempLine); tempStr.append(crlf); tempLine = rd.readLine(); } responseContent = tempStr.toString(); rd.close(); in.close(); } catch (IOException localIOException) { } finally { if (url_con != null) { url_con.disconnect(); } } return responseContent; } public static String sendTelCode(String mobile,String telcode){ Map map = new HashMap(); map.put("account", "Babo"); map.put("mobile", mobile); map.put("pswd", "D3dddD"); try { map.put("msg", java.net.URLEncoder.encode（"您的验证码是"+telcode+"，若非本人操作请忽略"，"utf-8"）); } catch ( e) {// TODO Auto-generated catch block e.printStackTrace(); } String getValue = http://www.xuexi88.com/zhishi/doPost(".bbs.servlet;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.IOException;import java.io.OutputStream;import java.io.PrintWriter;import java.util.Random;import javax.imageio.ImageIO;import javax.servlet.ServletException;import javax.servlet..sun.image.codec.jpeg.JPEGCodec;import com.sun.image.codec.jpeg.JPEGImageEncoder;public class Image extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("image/jpeg"); OutputStream out = response.getOutputStream(); response.setHeader("Pragma","No-cache"); response.setHeader("Cache-Control","no-cache"); response.setDateHeader("Expires", 0); int width = 60, height = 20; BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)； // 获取图形上下文 Graphics g = image.getGraphics（)； // 生成随机类 Random random = new Random（)； // 设定背景色 g.setColor(getRandColor(200, 250)); g.fillRect(0, 0, width, height)； // 设定字体 g.setFont(new Font("Times New Roman", Font.PLAIN, 18)）； // 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到 g.setColor(getRandColor(180, 200)); for (int i = 0; i