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这篇文章给大家介绍springboot中怎么利用vue实现验证码功能，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。
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));
}
}要跨域！！
@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;
}
}
}页面部分
<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 : > </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：
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();
},
},原生js方法：
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);
$.ajax({
async: false,
type: "post",
url: "/api/Code/checkVerify",
dataType: "json",
data: {
verifyInput: value,
},
success: function (result) {
if (result) {
alert("success!");
} else {
alert("failed!");
}
// window.location.reload();
getVerify();
},
});
}实际应用中：
防止页面跳回不重新加载：
imgUrl直接绑定随机数
imgUrl: "/api/Code/getVerify?" + Math.random(),
aVerify() {
var that = this;
var data = Qs.stringify({
verifyInput: this.formData.code,
});
that
.axios({
method: "post",
url: "/api/Code/checkVerify",
data: data,
})
.then((response) => {
console.log(response);
this.result=response.data;
console.log(this.result);
if ( response.data) {
this.submitForm();
// alert("success!");
} else {
this.$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;
},关于springboot中怎么利用vue实现验证码功能就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。
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