一、问题Can not set final java.lang.Class field
多数据源使用时，不能正确创建数据源连接。
java.lang.IllegalArgumentException: Can not set final java.lang.Class field org.apache.ibatis.binding.MapperProxy.mapperInterface to com.baomidou.mybatisplus.core.override.MybatisMapperProxy
java.lang.IllegalArgumentException: Can not set final java.lang.Class field org.apache.ibatis.binding.MapperProxy.mapperInterface to com.baomidou.mybatisplus.core.override.MybatisMapperProxy at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167) at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171) at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58) at sun.reflect.UnsafeQualifiedObjectFieldAccessorImpl.get(UnsafeQualifiedObjectFieldAccessorImpl.java:38) at java.lang.reflect.Field.get(Field.java:393) at com.baomidou.dynamic.datasource.DynamicDataSourceClassResolver.targetClass(DynamicDataSourceClassResolver.java:62) at com.baomidou.dynamic.datasource.aop.DynamicDataSourceAnnotationInterceptor.determineDatasource(DynamicDataSourceAnnotationInterceptor.java:59) at com.baomidou.dynamic.datasource.aop.DynamicDataSourceAnnotationInterceptor.invoke(DynamicDataSourceAnnotationInterceptor.java:50) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) at com.sun.proxy.$Proxy93.getOne(Unknown Source) at com.common.templatemybatisplus.TemplateMybatisplusApplicationTests.test04(Templ
二、问题解决
版本太低，升级版本既可。
https://github.com/baomidou/dynamic-datasource-spring-boot-starter/issues/106
<dependency> <groupId>com.baomidou</groupId> <artifactId>dynamic-datasource-spring-boot-starter</artifactId> <version>2.5.6</version> </dependency>
