本文实例为大家分享了springboot+vue实现验证码功能的具体代码，供大家参考，具体内容如下
1.工具类 直接用不用改
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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 <= stringNum; i++) { randomString = drowString(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) { e.printStackTrace();// 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 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)); }} |
2.Controller层
要跨域！！
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@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.printStackTrace();// 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; } }} |
3.前台vue方式：
页面部分
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<template> <div> <el-row :gutter="0"> <el-form ref="elForm" :model="formData" :rules="rules" size="medium" label-width="83px" label-position="left" > <img :src="imgUrl" alt="更换验证码" @click="getVerify(this)" /> <el-col :span="6"> <el-form-item label="验证码" prop="code"> <el-input v-model="formData.code" placeholder="请输入验证码" clearable :style="{ width: '100%' }" > </el-input> </el-form-item> </el-col> <el-col :span="24"> <el-form-item size="large"> <el-button type="primary" @click="aVerify()">提交</el-button> <el-button @click="resetForm">重置</el-button> </el-form-item> </el-col> </el-form> </el-row> </div></template> |
js部分：
vue方法：
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data() { return { imgUrl: "/api/Code/getVerify", formData: { code: undefined, }, rules: { code: [ { required: true, message: "请输入验证码", trigger: "blur", }, ], }, }; }, |
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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(); },}, |
原生js方法：
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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); $.ajax({ async: false, type: "post", url: "/api/Code/checkVerify", dataType: "json", data: { verifyInput: value, }, success: function (result) { if (result) { alert("success!"); } else { alert("failed!"); } // window.location.reload(); getVerify(); }, });} |
实际应用中：
防止页面跳回不重新加载：
imgUrl直接绑定随机数
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imgUrl: "/api/Code/getVerify?" + Math.random(), |
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aVerify() { var that = this; var data = Qs.stringify({ verifyInput: this.formData.code, }); that .axios({ method: "post", url: "/api/Code/checkVerify", data: data, }) .then((response) => { console.log(response); this.result=response.data; console.log(this.result); if ( response.data) { this.submitForm(); // alert("success!"); } else { this.$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; }, |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/weixin_47385334/article/details/113601305
