springboot+vue实现验证码功能

 package com.example.demo.Util; 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.HashMap; import java.util.Map; import java.util.Random; //import java.util.logging.Logger; public class CodeUtil { public static final String RANDOMCODEKEY= "RANDOMVALIDATECODEKEY";//放到session中的key 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 static final Logger logger =  LoggerFactory.getLogger(CodeUtil.class); 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 getRandcode(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); Graphics g = image.getGraphics();// 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 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++) { drowLine(g); } // 绘制随机字符 String randomString = ""; for (int i = 1; i >>>   ", e); } } /** * 绘制字符串 */ private String drowString(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 drowLine(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)); } }

 @RestController @RequestMapping("/Code") public class CodeController { private final static Logger logger =  LoggerFactory.getLogger(CodeController.class); /** * 生成验证码 */ @GetMapping("getVerify") @CrossOrigin(origins = "*") //    @RequestMapping(value = "/getVerify") public void getVerify(HttpServletRequest request, HttpServletResponse response) { try { response.setContentType("image/jpeg");//设置相应类型,告诉浏览器输出的内容为图片 response.setHeader("Pragma", "No-cache");//设置响应头信息，告诉浏览器不要缓存此内容 response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expire", 0); CodeUtil randomValidateCode = new CodeUtil(); randomValidateCode.getRandcode(request, response);//输出验证码图片方法 } catch (Exception e) { e.p<b style="color:transparent">来源gao@!dai!ma.com搞$$代^@码!网</b>rintStackTrace(); //            logger.error("获取验证码失败>>>>   ", e); } } /** * 校验验证码 */ @RequestMapping(value = "/checkVerify",headers = "Accept=application/json") @CrossOrigin(origins = "*",allowCredentials="true") 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) { return false; } if (random.equals(inputStr)) { return true; } else { return false; } }catch (Exception e){ e.printStackTrace(); //            logger.error("验证码校验失败", e); return false; } } }

  <div>        提交重置</div>

 data() { return { imgUrl: "/api/Code/getVerify", formData: { code: undefined, }, rules: { code: [ { required: true, message: "请输入验证码", trigger: "blur", }, ], }, }; },

 methods: { aVerify() { var that = this; var data = Qs.stringify({ verifyInput: this.formData.code, }); that .axios({ method: "post", url: "/api/Code/checkVerify", data: data, }) .then((response) => { console.log(response); if ( response.data) { alert("success!"); } else { alert("failed!"); } getVerify(); }); }, getVerify(obj) { console.log(obj); // obj.src = "/api/Code/getVerify?" + Math.random(); this.imgUrl = "/api/Code/getVerify?" + Math.random(); }, resetForm() { this.$refs["elForm"].resetFields(); }, },

 function getVerify(obj) { // obj.src =  "/api/Code/getVerify" obj.src = "/api/Code/getVerify?" + Math.random(); //原生js方式 console.log(obj.src); //  this.imgCode= "/api/Code/getVerify?"+Math.random(); } //   function getVerify() { //     // $("#imgCode").on("click", function() { //     $("#imgVerify").attr("src", 'Code/getVerify?' + Math.random());//jquery方式 //     // }); // } function aVerify() { var value = $("#verify_input").val(); // alert(value); $.ajax({ async: false, type: "post", url: "/api/Code/checkVerify", dataType: "json", data: { verifyInput: value, }, success: function (result) { if (result) { alert("success!"); } else { alert("failed!"); } // window.location.reload(); getVerify(); }, }); }

 imgUrl:  "/api/Code/getVerify?" + Math.random(), 

 aVerify() { var that = this; var data = Qs.stringify({ verifyInput: this.formData.code, }); that .axios({ method: "post", url: "/api/Code/checkVerify", data: data, }) .then((response) => { console.log(response); this.result=response.data; console.log(this.result); if ( response.data) { this.submitForm(); //  alert("success!"); } else { this.$message({ type: "warning", message: "验证码错误", }); this.getVerify(); } //  this.reload(); }); }, getVerify() { console.log("hhhhh"); // var timestmp = (new Date()).valueOf(); // obj.src = "/api/Code/getVerify?" + Math.random(); this.imgUrl = "/api/Code/getVerify?" + Math.random(); //  this.imgUrl = "/api/Code/getVerify?" + "&t=" +timestmp; },