common模块： 添加验证码工具类

kaiyu

2021-03-17 8fa47457bcda1c05b7df2c04a1d4c31eec51272c

 pom.xml

@@ -107,6 +107,11 @@
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.google.code.kaptcha</groupId>
            <artifactId>kaptcha</artifactId>
            <version>2.3.2</version>
        </dependency>
    </dependencies>