原因:使用spring boot 2.2.x 版本和 activiti 7.1.113 冲突
<activiti-dependencies.version>7.1.113</activiti-dependencies.version>
替换为
<activiti-dependencies.version>7.1.0.M4</activiti-dependencies.version>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.activiti.dependencies</groupId>
<artifactId>activiti-dependencies</artifactId>
<version>${activiti-dependencies.version}</version>
<scope>import</scope>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
替换为
<activiti-dependencies.version>7.1.0.M4</activiti-dependencies.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.activiti.dependencies</groupId>
<artifactId>activiti-dependencies</artifactId>
<version>${activiti-dependencies.version}</version>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>