java 生成图片验证码—瑞吉外卖集成 Google Kaptcha 从0到1 超详细
CaptchaImage生成 验证码 图片
captchaProducerMath.createText() 类似
captchaProducer.createText() 混合带字符的char如下
从若依学的，先看他的引用方式
package com.ruoyi.web.controller.common;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import com.google.code.kaptcha.Producer;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.CacheConstants;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.core.redis.RedisCache;
import com.ruoyi.common.utils.sign.Base64;
import com.ruoyi.common.utils.uuid.IdUtils;
import com.ruoyi.system.service.ISysConfigService;
/**
* 验证码操作处理
*
* @author ruoyi
*/
@RestController
public class CaptchaController
{
@Resource(name = "captchaProducer")
private Producer captchaProducer;
@Resource(name = "captchaProducerMath")
private Producer captchaProducerMath;
@Autowired
private RedisCache redisCache;
@Autowired
private ISysConfigService configService;
/**
* 生成验证码
*/
@GetMapping("/captchaImage")
public AjaxResult getCode(HttpServletResponse response) throws IOException
{
AjaxResult ajax = AjaxResult.success();
boolean captchaEnabled = configService.selectCaptchaEnabled();
ajax.put("captchaEnabled", captchaEnabled);
if (!captchaEnabled)
{
return ajax;
}
// 保存验证码信息
String uuid = IdUtils.simpleUUID();
String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;
String capStr = null, code = null;
BufferedImage image = null;
// 生成验证码
String captchaType = RuoYiConfig.getCaptchaType();
if ("math".equals(captchaType))
{
String capText = captchaProducerMath.createText();
capStr = capText.substring(0, capText.lastIndexOf("@"));
code = capText.substring(capText.lastIndexOf("@") + 1);
image = captchaProducerMath.createImage(capStr);
}
else if ("char".equals(captchaType))
{
capStr = code = captchaProducer.createText();
image = captchaProducer.createImage(capStr);
}
redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
// 转换流信息写出
FastByteArrayOutputStream os = new FastByteArrayOutputStream();
try
{
ImageIO.write(image, "jpg", os);
}
catch (IOException e)
{
return AjaxResult.error(e.getMessage());
}
ajax.put("uuid", uuid);
ajax.put("img", Base64.encode(os.toByteArray()));
return ajax;
}
}前端直接 传HttpServletResponse 访问url调用 ruoyi-ui/src/api/login.js
import request from '@/utils/request'
...
// 获取验证码
export function getCodeImg() {
return request({
url: '/captchaImage',
headers: {
isToken: false
},
method: 'get',
timeout: 20000
})
}ruoyi-ui/src/views/login.vue
<template>
<div class="login">
<el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form">
<h3 class="title">若依后台管理系统</h3>
<el-form-item prop="username">
<el-input
v-model="loginForm.username"
type="text"
auto-complete="off"
placeholder="账号"
>
<svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
</el-input>
</el-form-item>
<el-form-item prop="password">
<el-input
v-model="loginForm.password"
type="password"
auto-complete="off"
placeholder="密码"
@keyup.enter.native="handleLogin"
>
<svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
</el-input>
</el-form-item>
<el-form-item prop="code" v-if="captchaEnabled">
<el-input
v-model="loginForm.code"
auto-complete="off"
placeholder="验证码"
style="width: 63%"
@keyup.enter.native="handleLogin"
>
<svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
</el-input>
<div class="login-code">
<img :src="codeUrl" @click="getCode" class="login-code-img"/>
</div>
</el-form-item>
<el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
<el-form-item style="width:100%;">
<el-button
:loading="loading"
size="medium"
type="primary"
style="width:100%;"
@click.native.prevent="handleLogin"
>
<span v-if="!loading">登 录</span>
<span v-else>登 录 中...</span>
</el-button>
<div style="float: right;" v-if="register">
<router-link class="link-type" :to="'/register'">立即注册</router-link>
</div>
</el-form-item>
</el-form>
<!-- 底部 -->
<div class="el-login-footer">
<span>Copyright © 2018-2023 ruoyi.vip All Rights Reserved.</span>
</div>
</div>
</template>
<script>
import { getCodeImg } from "@/api/login";
import Cookies from "js-cookie";
import { encrypt, decrypt } from '@/utils/jsencrypt'
export default {
name: "Login",
data() {
return {
codeUrl: "",
loginForm: {
username: "admin",
password: "admin123",
rememberMe: false,
code: "",
uuid: ""
},
loginRules: {
username: [
{ required: true, trigger: "blur", message: "请输入您的账号" }
],
password: [
{ required: true, trigger: "blur", message: "请输入您的密码" }
],
code: [{ required: true, trigger: "change", message: "请输入验证码" }]
},
loading: false,
// 验证码开关
captchaEnabled: true,
// 注册开关
register: false,
redirect: undefined
};
},
watch: {
$route: {
handler: function(route) {
this.redirect = route.query && route.query.redirect;
},
immediate: true
}
},
created() {
this.getCode();
this.getCookie();
},
methods: {
getCode() {
getCodeImg().then(res => {
this.captchaEnabled = res.captchaEnabled === undefined ? true : res.captchaEnabled;
if (this.captchaEnabled) {
this.codeUrl = "data:image/gif;base64," + res.img;
this.loginForm.uuid = res.uuid;
}
});
},
getCookie() {
const username = Cookies.get("username");
const password = Cookies.get("password");
const rememberMe = Cookies.get('rememberMe')
this.loginForm = {
username: username === undefined ? this.loginForm.username : username,
password: password === undefined ? this.loginForm.password : decrypt(password),
rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
};
},
handleLogin() {
this.$refs.loginForm.validate(valid => {
if (valid) {
this.loading = true;
if (this.loginForm.rememberMe) {
Cookies.set("username", this.loginForm.username, { expires: 30 });
Cookies.set("password", encrypt(this.loginForm.password), { expires: 30 });
Cookies.set('rememberMe', this.loginForm.rememberMe, { expires: 30 });
} else {
Cookies.remove("username");
Cookies.remove("password");
Cookies.remove('rememberMe');
}
this.$store.dispatch("Login", this.loginForm).then(() => {
this.$router.push({ path: this.redirect || "/" }).catch(()=>{});
}).catch(() => {
this.loading = false;
if (this.captchaEnabled) {
this.getCode();
}
});
}
});
}
}
};
</script>
<style rel="stylesheet/scss" lang="scss">
.login {
display: flex;
justify-content: center;
align-items: center;
height: 100%;
background-image: url("../assets/images/login-background.jpg");
background-size: cover;
}
.title {
margin: 0px auto 30px auto;
text-align: center;
color: #707070;
}
.login-form {
border-radius: 6px;
background: #ffffff;
width: 400px;
padding: 25px 25px 5px 25px;
.el-input {
height: 38px;
input {
height: 38px;
}
}
.input-icon {
height: 39px;
width: 14px;
margin-left: 2px;
}
}
.login-tip {
font-size: 13px;
text-align: center;
color: #bfbfbf;
}
.login-code {
width: 33%;
height: 38px;
float: right;
img {
cursor: pointer;
vertical-align: middle;
}
}
.el-login-footer {
height: 40px;
line-height: 40px;
position: fixed;
bottom: 0;
width: 100%;
text-align: center;
color: #fff;
font-family: Arial;
font-size: 12px;
letter-spacing: 1px;
}
.login-code-img {
height: 38px;
}
</style>login.vue与验证码相关之处
<template>
<div class="login">
<el-form-item prop="code" v-if="captchaEnabled">
<el-input
v-model="loginForm.code"
auto-complete="off"
placeholder="验证码"
style="width: 63%"
@keyup.enter.native="handleLogin"
>
<svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
</el-input>
<div class="login-code">
<img :src="codeUrl" @click="getCode" class="login-code-img"/>
</div>
</el-form-item>
<el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
</el-form>
</div>
</template>
<script>
import { getCodeImg } from "@/api/login";
import Cookies from "js-cookie";
import { encrypt, decrypt } from '@/utils/jsencrypt'
export default {
name: "Login",
data() {
return {
codeUrl: "",
loginForm: {
username: "admin",
password: "admin123",
rememberMe: false,
code: "",
uuid: ""
},
loginRules: {
username: [
{ required: true, trigger: "blur", message: "请输入您的账号" }
],
password: [
{ required: true, trigger: "blur", message: "请输入您的密码" }
],
code: [{ required: true, trigger: "change", message: "请输入验证码" }]
},
loading: false,
// 验证码开关
captchaEnabled: true,
// 注册开关
register: false,
redirect: undefined
};
},
created() {
this.getCode();
this.getCookie();
},
methods: {
getCode() {
getCodeImg().then(res => {
this.captchaEnabled = res.captchaEnabled === undefined ? true : res.captchaEnabled;
if (this.captchaEnabled) {
this.codeUrl = "data:image/gif;base64," + res.img;
this.loginForm.uuid = res.uuid;
}
});
},
</script>
<style rel="stylesheet/scss" lang="scss">
</style>this.codeUrl = "data:image/gif;base64," + res.img;
加了个前缀 生成验证码图片网址输入：
data:image/gif;base64,+下面response的img
即可得到生成的图片
发送的请求：http://localhost/dev-api/captchaImage
返回的response：
{"msg":"操作成功","img":"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","code":200,"captchaEnabled":true,"uuid":"6e0305699f91421dab8baa377347bd10"}集成步骤如下：
随便用的瑞吉外卖集成，因为瑞吉本来就需要redis，就没删redis；
任意一个由pom.XMl的项目其实都可以
pom：
<!-- 图片验证码 -->
<dependency>
<groupId>pro.fessional</groupId>
<artifactId>kaptcha</artifactId>
<version>2.3.3</version>
</dependency>-
项目结构
package自己起名字就行
2、具体编码6个文件的内容；其它五个都是为了服务CaptchaController
CaptchaController
package com.it...;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
/**
* 验证码操作处理
*
* @author ruoyi
*/
@RestController
public class CaptchaController
{
@Resource(name = "captchaProducer")
private Producer captchaProducer;
@Resource(name = "captchaProducerMath")
private Producer captchaProducerMath;
@Autowired
private RedisCache redisCache;
/**
* 验证码 redis key
*/
public static final String CAPTCHA_CODE_KEY = "captcha_codes:";
/**
* 验证码有效期（分钟）
*/
public static final Integer CAPTCHA_EXPIRATION = 2;
/**
* 生成验证码
*/
@GetMapping("/captchaImage")
public String getCode() throws IOException
{
// 保存验证码信息
String uuid = IdUtils.simpleUUID();
String verifyKey = CAPTCHA_CODE_KEY + uuid;
String capStr = null, code = null;
BufferedImage image = null;
// 生成验证码
String captchaType = "math";
String captchaType2 = "char";
if ("math".equals(captchaType2))
{
String capText = captchaProducerMath.createText();
capStr = capText.substring(0, capText.lastIndexOf("@"));
code = capText.substring(capText.lastIndexOf("@") + 1);
image = captchaProducerMath.createImage(capStr);
}
else if ("char".equals(captchaType2))
{
capStr = code = captchaProducer.createText();
image = captchaProducer.createImage(capStr);
}
redisCache.setCacheObject(verifyKey, code, CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
// 转换流信息写出
FastByteArrayOutputStream os = new FastByteArrayOutputStream();
try
{
ImageIO.write(image, "jpg", os);
}
catch (IOException e)
{
System.out.println("验证码生成出错："+e);
}
System.out.println("img：*********"+ Base64.encode(os.toByteArray()));
return Base64.encode(os.toByteArray());
}
}Base64
package com.it;
/**
* Base64工具类
*
* @author ruoyi
*/
public final class Base64
{
static private final int BASELENGTH = 128;
static private final int LOOKUPLENGTH = 64;
static private final int TWENTYFOURBITGROUP = 24;
static private final int EIGHTBIT = 8;
static private final int SIXTEENBIT = 16;
static private final int FOURBYTE = 4;
static private final int SIGN = -128;
static private final char PAD = '=';
static final private byte[] base64Alphabet = new byte[BASELENGTH];
static final private char[] lookUpBase64Alphabet = new char[LOOKUPLENGTH];
static
{
for (int i = 0; i < BASELENGTH; ++i)
{
base64Alphabet[i] = -1;
}
for (int i = 'Z'; i >= 'A'; i--)
{
base64Alphabet[i] = (byte) (i - 'A');
}
for (int i = 'z'; i >= 'a'; i--)
{
base64Alphabet[i] = (byte) (i - 'a' + 26);
}
for (int i = '9'; i >= '0'; i--)
{
base64Alphabet[i] = (byte) (i - '0' + 52);
}
base64Alphabet['+'] = 62;
base64Alphabet['/'] = 63;
for (int i = 0; i <= 25; i++)
{
lookUpBase64Alphabet[i] = (char) ('A' + i);
}
for (int i = 26, j = 0; i <= 51; i++, j++)
{
lookUpBase64Alphabet[i] = (char) ('a' + j);
}
for (int i = 52, j = 0; i <= 61; i++, j++)
{
lookUpBase64Alphabet[i] = (char) ('0' + j);
}
lookUpBase64Alphabet[62] = (char) '+';
lookUpBase64Alphabet[63] = (char) '/';
}
private static boolean isWhiteSpace(char octect)
{
return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);
}
private static boolean isPad(char octect)
{
return (octect == PAD);
}
private static boolean isData(char octect)
{
return (octect < BASELENGTH && base64Alphabet[octect] != -1);
}
/**
* Encodes hex octects into Base64
*
* @param binaryData Array containing binaryData
* @return Encoded Base64 array
*/
public static String encode(byte[] binaryData)
{
if (binaryData == null)
{
return null;
}
int lengthDataBits = binaryData.length * EIGHTBIT;
if (lengthDataBits == 0)
{
return "";
}
int fewerThan24bits = lengthDataBits % TWENTYFOURBITGROUP;
int numberTriplets = lengthDataBits / TWENTYFOURBITGROUP;
int numberQuartet = fewerThan24bits != 0 ? numberTriplets + 1 : numberTriplets;
char encodedData[] = null;
encodedData = new char[numberQuartet * 4];
byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;
int encodedIndex = 0;
int dataIndex = 0;
for (int i = 0; i < numberTriplets; i++)
{
b1 = binaryData[dataIndex++];
b2 = binaryData[dataIndex++];
b3 = binaryData[dataIndex++];
l = (byte) (b2 & 0x0f);
k = (byte) (b1 & 0x03);
byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2) : (byte) ((b1) >> 2 ^ 0xc0);
byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4) : (byte) ((b2) >> 4 ^ 0xf0);
byte val3 = ((b3 & SIGN) == 0) ? (byte) (b3 >> 6) : (byte) ((b3) >> 6 ^ 0xfc);
encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];
encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];
}
// form integral number of 6-bit groups
if (fewerThan24bits == EIGHTBIT)
{
b1 = binaryData[dataIndex];
k = (byte) (b1 & 0x03);
byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2) : (byte) ((b1) >> 2 ^ 0xc0);
encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
encodedData[encodedIndex++] = lookUpBase64Alphabet[k << 4];
encodedData[encodedIndex++] = PAD;
encodedData[encodedIndex++] = PAD;
}
else if (fewerThan24bits == SIXTEENBIT)
{
b1 = binaryData[dataIndex];
b2 = binaryData[dataIndex + 1];
l = (byte) (b2 & 0x0f);
k = (byte) (b1 & 0x03);
byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2) : (byte) ((b1) >> 2 ^ 0xc0);
byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4) : (byte) ((b2) >> 4 ^ 0xf0);
encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
encodedData[encodedIndex++] = lookUpBase64Alphabet[l << 2];
encodedData[encodedIndex++] = PAD;
}
return new String(encodedData);
}
/**
* Decodes Base64 data into octects
*
* @param encoded string containing Base64 data
* @return Array containind decoded data.
*/
public static byte[] decode(String encoded)
{
if (encoded == null)
{
return null;
}
char[] base64Data = encoded.toCharArray();
// remove white spaces
int len = removeWhiteSpace(base64Data);
if (len % FOURBYTE != 0)
{
return null;// should be divisible by four
}
int numberQuadruple = (len / FOURBYTE);
if (numberQuadruple == 0)
{
return new byte[0];
}
byte decodedData[] = null;
byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
char d1 = 0, d2 = 0, d3 = 0, d4 = 0;
int i = 0;
int encodedIndex = 0;
int dataIndex = 0;
decodedData = new byte[(numberQuadruple) * 3];
for (; i < numberQuadruple - 1; i++)
{
if (!isData((d1 = base64Data[dataIndex++])) || !isData((d2 = base64Data[dataIndex++]))
|| !isData((d3 = base64Data[dataIndex++])) || !isData((d4 = base64Data[dataIndex++])))
{
return null;
} // if found "no data" just return null
b1 = base64Alphabet[d1];
b2 = base64Alphabet[d2];
b3 = base64Alphabet[d3];
b4 = base64Alphabet[d4];
decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
}
if (!isData((d1 = base64Data[dataIndex++])) || !isData((d2 = base64Data[dataIndex++])))
{
return null;// if found "no data" just return null
}
b1 = base64Alphabet[d1];
b2 = base64Alphabet[d2];
d3 = base64Data[dataIndex++];
d4 = base64Data[dataIndex++];
if (!isData((d3)) || !isData((d4)))
{// Check if they are PAD characters
if (isPad(d3) && isPad(d4))
{
if ((b2 & 0xf) != 0)// last 4 bits should be zero
{
return null;
}
byte[] tmp = new byte[i * 3 + 1];
System.arraycopy(decodedData, 0, tmp, 0, i * 3);
tmp[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);
return tmp;
}
else if (!isPad(d3) && isPad(d4))
{
b3 = base64Alphabet[d3];
if ((b3 & 0x3) != 0)// last 2 bits should be zero
{
return null;
}
byte[] tmp = new byte[i * 3 + 2];
System.arraycopy(decodedData, 0, tmp, 0, i * 3);
tmp[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
tmp[encodedIndex] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
return tmp;
}
else
{
return null;
}
}
else
{ // No PAD e.g 3cQl
b3 = base64Alphabet[d3];
b4 = base64Alphabet[d4];
decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
}
return decodedData;
}
/**
* remove WhiteSpace from MIME containing encoded Base64 data.
*
* @param data the byte array of base64 data (with WS)
* @return the new length
*/
private static int removeWhiteSpace(char[] data)
{
if (data == null)
{
return 0;
}
// count characters that's not whitespace
int newSize = 0;
int len = data.length;
for (int i = 0; i < len; i++)
{
if (!isWhiteSpace(data[i]))
{
data[newSize++] = data[i];
}
}
return newSize;
}
}KaptchaTextCreator
package com.itsw;
import com.google.code.kaptcha.text.impl.DefaultTextCreator;
import java.util.Random;
/**
* 验证码文本生成器
*
* @author ruoyi
*/
public class KaptchaTextCreator extends DefaultTextCreator
{
private static final String[] CNUMBERS = "0,1,2,3,4,5,6,7,8,9,10".split(",");
@Override
public String getText()
{
Integer result = 0;
Random random = new Random();
int x = random.nextInt(10);
int y = random.nextInt(10);
StringBuilder suChinese = new StringBuilder();
int randomoperands = random.nextInt(3);
if (randomoperands == 0)
{
result = x * y;
suChinese.append(CNUMBERS[x]);
suChinese.append("*");
suChinese.append(CNUMBERS[y]);
}
else if (randomoperands == 1)
{
if ((x != 0) && y % x == 0)
{
result = y / x;
suChinese.append(CNUMBERS[y]);
suChinese.append("/");
suChinese.append(CNUMBERS[x]);
}
else
{
result = x + y;
suChinese.append(CNUMBERS[x]);
suChinese.append("+");
suChinese.append(CNUMBERS[y]);
}
}
else
{
if (x >= y)
{
result = x - y;
suChinese.append(CNUMBERS[x]);
suChinese.append("-");
suChinese.append(CNUMBERS[y]);
}
else
{
result = y - x;
suChinese.append(CNUMBERS[y]);
suChinese.append("-");
suChinese.append(CNUMBERS[x]);
}
}
suChinese.append("=?@" + result);
return suChinese.toString();
}
}CaptchaConfig
properties.setProperty(KAPTCHA_TEXTPRODUCER_IMPL, "com.itswpu.....KaptchaTextCreator");
注意：双引号里改成你的KaptchaTextCreator所在的位置
package com.it...;
import java.util.Properties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import static com.google.code.kaptcha.Constants.*;
/**
* 验证码配置
*
* @author ruoyi
*/
@Configuration
public class CaptchaConfig
{
@Bean(name = "captchaProducer")
public DefaultKaptcha getKaptchaBean()
{
DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
Properties properties = new Properties();
// 是否有边框 默认为true 我们可以自己设置yes，no
properties.setProperty(KAPTCHA_BORDER, "yes");
// 验证码文本字符颜色 默认为Color.BLACK
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_COLOR, "black");
// 验证码图片宽度 默认为200
properties.setProperty(KAPTCHA_IMAGE_WIDTH, "160");
// 验证码图片高度 默认为50
properties.setProperty(KAPTCHA_IMAGE_HEIGHT, "60");
// 验证码文本字符大小 默认为40
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_SIZE, "38");
// KAPTCHA_SESSION_KEY
properties.setProperty(KAPTCHA_SESSION_CONFIG_KEY, "kaptchaCode");
// 验证码文本字符长度 默认为5
properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "4");
// 验证码文本字体样式 默认为new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_NAMES, "Arial,Courier");
// 图片样式 水纹com.google.code.kaptcha.impl.WaterRipple 鱼眼com.google.code.kaptcha.impl.FishEyeGimpy 阴影com.google.code.kaptcha.impl.ShadowGimpy
properties.setProperty(KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.ShadowGimpy");
Config config = new Config(properties);
defaultKaptcha.setConfig(config);
return defaultKaptcha;
}
@Bean(name = "captchaProducerMath")
public DefaultKaptcha getKaptchaBeanMath()
{
DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
Properties properties = new Properties();
// 是否有边框 默认为true 我们可以自己设置yes，no
properties.setProperty(KAPTCHA_BORDER, "yes");
// 边框颜色 默认为Color.BLACK
properties.setProperty(KAPTCHA_BORDER_COLOR, "105,179,90");
// 验证码文本字符颜色 默认为Color.BLACK
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_COLOR, "blue");
// 验证码图片宽度 默认为200
properties.setProperty(KAPTCHA_IMAGE_WIDTH, "160");
// 验证码图片高度 默认为50
properties.setProperty(KAPTCHA_IMAGE_HEIGHT, "60");
// 验证码文本字符大小 默认为40
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_SIZE, "35");
// KAPTCHA_SESSION_KEY
properties.setProperty(KAPTCHA_SESSION_CONFIG_KEY, "kaptchaCodeMath");
// 验证码文本生成器
properties.setProperty(KAPTCHA_TEXTPRODUCER_IMPL, "com.itswpu.....KaptchaTextCreator");
// 验证码文本字符间距 默认为2
properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_SPACE, "3");
// 验证码文本字符长度 默认为5
properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "6");
// 验证码文本字体样式 默认为new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_NAMES, "Arial,Courier");
// 验证码噪点颜色 默认为Color.BLACK
properties.setProperty(KAPTCHA_NOISE_COLOR, "white");
// 干扰实现类
properties.setProperty(KAPTCHA_NOISE_IMPL, "com.google.code.kaptcha.impl.NoNoise");
// 图片样式 水纹com.google.code.kaptcha.impl.WaterRipple 鱼眼com.google.code.kaptcha.impl.FishEyeGimpy 阴影com.google.code.kaptcha.impl.ShadowGimpy
properties.setProperty(KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.ShadowGimpy");
Config config = new Config(properties);
defaultKaptcha.setConfig(config);
return defaultKaptcha;
}
}IdUtils
package com.itswpu.huanswpu.Captcha;
import java.util.UUID;
/**
* ID生成器工具类
*
* @author ruoyi
*/
public class IdUtils
{
/**
* 获取随机UUID
*
* @return 随机UUID
*/
public static String randomUUID()
{
return UUID.randomUUID().toString();
}
/**
* 简化的UUID，去掉了横线
*
* @return 简化的UUID，去掉了横线
*/
public static String simpleUUID()
{
return UUID.randomUUID().toString();
}
}RedisCache
package com.it..;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.BoundSetOperations;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
/**
* spring redis 工具类
*
* @author ruoyi
**/
@SuppressWarnings(value = { "unchecked", "rawtypes" })
@Component
public class RedisCache
{
@Autowired
public RedisTemplate redisTemplate;
/**
* 缓存基本的对象，Integer、String、实体类等
*
* @param key 缓存的键值
* @param value 缓存的值
*/
public <T> void setCacheObject(final String key, final T value)
{
redisTemplate.opsForValue().set(key, value);
}
/**
* 缓存基本的对象，Integer、String、实体类等
*
* @param key 缓存的键值
* @param value 缓存的值
* @param timeout 时间
* @param timeUnit 时间颗粒度
*/
public <T> void setCacheObject(final String key, final T value, final Integer timeout, final TimeUnit timeUnit)
{
redisTemplate.opsForValue().set(key, value, timeout, timeUnit);
}
/**
* 设置有效时间
*
* @param key Redis键
* @param timeout 超时时间
* @return true=设置成功；false=设置失败
*/
public boolean expire(final String key, final long timeout)
{
return expire(key, timeout, TimeUnit.SECONDS);
}
/**
* 设置有效时间
*
* @param key Redis键
* @param timeout 超时时间
* @param unit 时间单位
* @return true=设置成功；false=设置失败
*/
public boolean expire(final String key, final long timeout, final TimeUnit unit)
{
return redisTemplate.expire(key, timeout, unit);
}
/**
* 获取有效时间
*
* @param key Redis键
* @return 有效时间
*/
public long getExpire(final String key)
{
return redisTemplate.getExpire(key);
}
/**
* 判断 key是否存在
*
* @param key 键
* @return true 存在 false不存在
*/
public Boolean hasKey(String key)
{
return redisTemplate.hasKey(key);
}
/**
* 获得缓存的基本对象。
*
* @param key 缓存键值
* @return 缓存键值对应的数据
*/
public <T> T getCacheObject(final String key)
{
ValueOperations<String, T> operation = redisTemplate.opsForValue();
return operation.get(key);
}
/**
* 删除单个对象
*
* @param key
*/
public boolean deleteObject(final String key)
{
return redisTemplate.delete(key);
}
/**
* 删除集合对象
*
* @param collection 多个对象
* @return
*/
public boolean deleteObject(final Collection collection)
{
return redisTemplate.delete(collection) > 0;
}
/**
* 缓存List数据
*
* @param key 缓存的键值
* @param dataList 待缓存的List数据
* @return 缓存的对象
*/
public <T> long setCacheList(final String key, final List<T> dataList)
{
Long count = redisTemplate.opsForList().rightPushAll(key, dataList);
return count == null ? 0 : count;
}
/**
* 获得缓存的list对象
*
* @param key 缓存的键值
* @return 缓存键值对应的数据
*/
public <T> List<T> getCacheList(final String key)
{
return redisTemplate.opsForList().range(key, 0, -1);
}
/**
* 缓存Set
*
* @param key 缓存键值
* @param dataSet 缓存的数据
* @return 缓存数据的对象
*/
public <T> BoundSetOperations<String, T> setCacheSet(final String key, final Set<T> dataSet)
{
BoundSetOperations<String, T> setOperation = redisTemplate.boundSetOps(key);
Iterator<T> it = dataSet.iterator();
while (it.hasNext())
{
setOperation.add(it.next());
}
return setOperation;
}
/**
* 获得缓存的set
*
* @param key
* @return
*/
public <T> Set<T> getCacheSet(final String key)
{
return redisTemplate.opsForSet().members(key);
}
/**
* 缓存Map
*
* @param key
* @param dataMap
*/
public <T> void setCacheMap(final String key, final Map<String, T> dataMap)
{
if (dataMap != null) {
redisTemplate.opsForHash().putAll(key, dataMap);
}
}
/**
* 获得缓存的Map
*
* @param key
* @return
*/
public <T> Map<String, T> getCacheMap(final String key)
{
return redisTemplate.opsForHash().entries(key);
}
/**
* 往Hash中存入数据
*
* @param key Redis键
* @param hKey Hash键
* @param value 值
*/
public <T> void setCacheMapValue(final String key, final String hKey, final T value)
{
redisTemplate.opsForHash().put(key, hKey, value);
}
/**
* 获取Hash中的数据
*
* @param key Redis键
* @param hKey Hash键
* @return Hash中的对象
*/
public <T> T getCacheMapValue(final String key, final String hKey)
{
HashOperations<String, String, T> opsForHash = redisTemplate.opsForHash();
return opsForHash.get(key, hKey);
}
/**
* 获取多个Hash中的数据
*
* @param key Redis键
* @param hKeys Hash键集合
* @return Hash对象集合
*/
public <T> List<T> getMultiCacheMapValue(final String key, final Collection<Object> hKeys)
{
return redisTemplate.opsForHash().multiGet(key, hKeys);
}
/**
* 删除Hash中的某条数据
*
* @param key Redis键
* @param hKey Hash键
* @return 是否成功
*/
public boolean deleteCacheMapValue(final String key, final String hKey)
{
return redisTemplate.opsForHash().delete(key, hKey) > 0;
}
/**
* 获得缓存的基本对象列表
*
* @param pattern 字符串前缀
* @return 对象列表
*/
public Collection<String> keys(final String pattern)
{
return redisTemplate.keys(pattern);
}
}3、试验效果
网址输入如图：
加了个前缀 生成验证码图片网址输入：
data:image/gif;base64,加 /9...
即可得到生成的图片
你的三连是我创作的最大动力！
本文来自博客园，作者：软工菜鸡，转载请注明原文链接：https://www.cnblogs.com/SElearner/p/17676639.html
