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- package com.xue.verificationcode.common.utils;
-
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
-
- import javax.imageio.ImageIO;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import javax.servlet.http.HttpSession;
- import java.awt.*;
- import java.awt.image.BufferedImage;
- import java.util.Random;
-
- /**
- * @author cx
- * @Title: RandomValidateCodeUtil
- * @Package
- * @Description:
- * @date 2021/1/1210:43
- */
- public class RandomValidateCodeUtil {
- public static final String RANDOMCODEKEY = "RANDOMVALIDATECODEKEY";//放到session中的key
- private static final Logger logger = LoggerFactory.getLogger(RandomValidateCodeUtil.class);
-
- // private String randString = "0123456789";//随机产生只有数字的字符串 private String
- //private String randString = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";//随机产生只有字母的字符串
- private String randString = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";//随机产生数字与字母组合的字符串
-
- private int width = 95;// 图片宽
- private int height = 25;// 图片高
- private int lineSize = 40;// 干扰线数量
- private int stringNum = 4;// 随机产生字符数量
- private Random random = new Random();
-
- /**
- * 获得字体
- */
- private Font getFont() {
- return new Font("Fixedsys", Font.CENTER_BASELINE, 18);
- }
-
- /**
- * 获得颜色
- */
- private Color getRandColor(int fc, int bc) {
- if (fc > 255)
- fc = 255;
- if (bc > 255)
- bc = 255;
- int r = fc + random.nextInt(bc - fc - 16);
- int g = fc + random.nextInt(bc - fc - 14);
- int b = fc + random.nextInt(bc - fc - 18);
- return new Color(r, g, b);
- }
-
- /**
- * 生成随机图片
- */
- public void getRandomCode(HttpServletRequest request, HttpServletResponse response) {
-
- HttpSession session = request.getSession();
-
- // BufferedImage类是具有缓冲区的Image类,Image类是用于描述图像信息的类
- BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_BGR);
-
- // 产生Image对象的Graphics对象,改对象可以在图像上进行各种绘制操作
- Graphics g = image.getGraphics();
-
- g.fillRect(0, 0, width, height);//图片大小
-
- g.setFont(new Font("Times New Roman", Font.ROMAN_BASELINE, 18));//字体大小
-
- g.setColor(getRandColor(110, 133));//字体颜色
-
- // 绘制干扰线
- for (int i = 0; i <= lineSize; i++) {
- drawLine(g);
- }
-
- // 绘制随机字符
- String randomString = "";
-
- for (int i = 1; i <= stringNum; i++) {
- randomString = drawString(g, randomString, i);
- }
-
- // logger.info(randomString);
-
- //将生成的随机字符串保存到session中
- session.removeAttribute(RANDOMCODEKEY);
- session.setAttribute(RANDOMCODEKEY, randomString);
- g.dispose();
-
- try {
- // 将内存中的图片通过流动形式输出到客户端
- ImageIO.write(image, "JPEG", response.getOutputStream());
- } catch (Exception e) {
- logger.error("将内存中的图片通过流动形式输出到客户端失败>>>> ", e);
- }
-
- }
-
- /**
- * 绘制字符串
- */
- private String drawString(Graphics g, String randomString, int i) {
- g.setFont(getFont());
- g.setColor(new Color(random.nextInt(101), random.nextInt(111), random
- .nextInt(121)));
- String rand = String.valueOf(getRandomString(random.nextInt(randString
- .length())));
- randomString += rand;
- g.translate(random.nextInt(3), random.nextInt(3));
- g.drawString(rand, 13 * i, 16);
- return randomString;
- }
-
- /**
- * 绘制干扰线
- */
- private void drawLine(Graphics g) {
-
- int x = random.nextInt(width);
- int y = random.nextInt(height);
-
- int xl = random.nextInt(13);
- int yl = random.nextInt(15);
-
- g.drawLine(x, y, x + xl, y + yl);
-
- }
-
- /**
- * 获取随机的字符
- */
- public String getRandomString(int num) {
- return String.valueOf(randString.charAt(num));
- }
- }
- package com.xue.verificationcode.controller;
-
- import com.xue.verificationcode.common.utils.RandomValidateCodeUtil;
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
- import org.springframework.stereotype.Controller;
- import org.springframework.web.bind.annotation.*;
-
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import javax.servlet.http.HttpSession;
-
- /**
- * @author cx
- * @Title: VerifyCodeController
- * @Package
- * @Description:
- * @date 2021/1/1117:17
- */
- @Controller
- @RequestMapping("/login")
- public class VerifyCodeController {
-
- private final static Logger logger = LoggerFactory.getLogger(VerifyCodeController.class);
-
- @RequestMapping("/index")
- public String getIndex(){
- return "index";
- }
-
- /**
- * 生成验证码
- */
- @RequestMapping(value = "/getVerify")
- @ResponseBody
- public void getVerify(HttpServletRequest request, HttpServletResponse response) {
-
- try {
-
- //设置相应类型,告诉浏览器输出的内容为图片
- response.setContentType("image/jpeg");
-
- //设置响应头信息,告诉浏览器不要缓存此内容
- response.setHeader("Pragma", "No-cache");
- response.setHeader("Cache-Control", "no-cache");
- response.setDateHeader("Expire", 0);
-
- RandomValidateCodeUtil randomValidateCode = new RandomValidateCodeUtil();
-
- randomValidateCode.getRandomCode(request, response);//输出验证码图片方法
-
- } catch (Exception e) {
-
- logger.error("获取验证码失败>>>> ", e);
-
- }
-
- }
-
- /**
- * 校验验证码
- */
- @RequestMapping(value = "/checkVerify", method = RequestMethod.POST, headers = "Accept=application/json")
- @ResponseBody
- public boolean checkVerify(@RequestParam String verifyInput, HttpSession session) {
- try {
-
- //从session中获取随机数
- String inputStr = verifyInput;
-
- String random = (String) session.getAttribute("RANDOMVALIDATECODEKEY");
-
- if (random == null || "".equals(random) || !random.equalsIgnoreCase(inputStr)) {
- return false;
- } else {
- return true;
- }
-
- } catch (Exception e) {
- logger.error("验证码校验失败", e);
- return false;
- }
- }
-
-
- }
- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>登陆</title>
-
- </head>
-
- <style>
- #main_form {
- width: 300px;
- height: 200px;
- margin: 100px auto;
-
- background-color: #F0F0F0;
- border: 1px solid #c2c2c2;
- }
-
- #input_content {
- margin-top: 20px;
- text-align: center;
- border: 5px;
- }
-
- #verify_image, #submit_btn {
- text-align: center;
- margin: 20px auto;
- }
- </style>
-
- <body>
-
-
- <div id="main_form">
- <div id="input_content">
- <input autocomplete="off" autofocus id="verify_input" placeholder="请输入验证码" maxlength="4">
- </div>
- <div id="verify_image">
- <img id="imgVerify" src="getVerify" alt="更换验证码" height="36" width="170" onclick="getVerify(this);">
- </div>
-
- <div id="submit_btn">
- <input type="button" onclick="aVerify()" value="判断是否正确">
- </div>
- </div>
-
-
- </body>
- <!--<script type="text/javascript" src="./js/jquery.min.js"></script>-->
- <script type="text/javascript"src="http://code.jquery.com/jquery-1.4.1.min.js"></script>
-
- <script>
-
-
- function getVerify() {
- $("#verify_input").val("");
- $("#imgVerify").attr("src", 'getVerify?' + Math.random());//jquery方式
- }
-
- function aVerify() {
- let value = $("#verify_input").val();
-
- if (value.length < 4) {
- alert("验证码不足4位 , 请重新输入!!");
- return 0;
- }
-
-
- $.ajax({
- async: false,
- type: 'post',
- url: 'checkVerify',
- dataType: "json",
- data: {
- verifyInput: value
- },
- success: function (result) {
-
- if (result) {
-
- if (confirm("验证成功, 再试一次 !")) {
- getVerify();
- } else {
- window.location.href = "https:www.baidu.com";
- }
-
- } else {
- alert("验证失败 , 点击确定重新验证");
- getVerify();
- }
- // window.location.reload();
- }
- });
- }
-
-
- </script>
- </html>
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