开发项目使用技术栈spring boot 2 + mybatis-plus + flowable 6.3时， 启动报错，如下：

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

  com.baomidou.mybatisplus.core.MybatisMapperAnnotationBuilder.getLanguageDriver(MybatisMapperAnnotationBuilder.java:384)

The following method did not exist:

  org.apache.ibatis.session.Configuration.getLanguageDriver(Ljava/lang/Class;)Lorg/apache/ibatis/scripting/LanguageDriver;

The calling method's class, com.baomidou.mybatisplus.core.MybatisMapperAnnotationBuilder, was loaded from the following location:

    jar:file:/D:/maven/repository/com/baomidou/mybatis-plus-core/3.4.3.4/mybatis-plus-core-3.4.3.4.jar!/com/baomidou/mybatisplus/core/MybatisMapperAnnotationBuilder.class

The called method's class, org.apache.ibatis.session.Configuration, is available from the following locations:

    jar:file:/D:/maven/repository/org/mybatis/mybatis/3.4.5/mybatis-3.4.5.jar!/org/apache/ibatis/session/Configuration.class

The called method's class hierarchy was loaded from the following locations:

    org.apache.ibatis.session.Configuration: file:/D:/maven/repository/org/mybatis/mybatis/3.4.5/mybatis-3.4.5.jar
Action:

Correct the classpath of your application so that it contains compatible versions of the classes com.baomidou.mybatisplus.core.MybatisMapperAnnotationBuilder and org.apache.ibatis.session.Configuration

仔细查看问题描述，一直没搞懂mybatis 怎么引入的，后来才发现flowable是也会引入 mybatis，导致jar冲突。

找到问题所在，解决起来就简单了：

在pom.xml 中，引入 flowable  时，排除 mybatis 的部分即可。

<dependency>
   <groupId>org.flowable</groupId>
   <artifactId>flowable-spring-boot-starter</artifactId>
   <version>6.3.0</version>
   <exclusions>
      <exclusion>
         <groupId>org.mybatis</groupId>
         <artifactId>mybatis</artifactId>
      </exclusion>
   </exclusions>
</dependency>

 文章借鉴：spring boot 集成 flowable 时mybatis-plus-core-3.1.2.jar 冲突 - 赵晓欣的个人空间 - OSCHINA - 中文开源技术交流社区