MyBatis-Plus 3.4.3.1版本resultMap存在类型转换异常

当前使用版本(必填,否则不予处理)

3.4.3.1

该问题是如何引起的？(确定最新版也有问题再提!!!)

这个PR 的代码修改后存在问题 https://github.com/baomidou/mybatis-plus/pull/3587 调试发现类型除了ResuleMap外还有其他类型，强制转换会抛出类型转换异常 MyBatis-Plus 3.4.3.1版本resultMap存在类型转换异常

重现步骤(如果有就写完整)

报错信息

Caused by: java.lang.ClassCastException: class com.baomidou.mybatisplus.core.MybatisConfiguration$StrictMap$Ambiguity cannot be cast to class org.apache.ibatis.mapping.ResultMap (com.baomidou.mybatisplus.core.MybatisConfiguration$StrictMap$Ambiguity and org.apache.ibatis.mapping.ResultMap are in unnamed module of loader 'app') at com.baomidou.mybatisplus.core.MybatisConfiguration.checkGloballyForDiscriminatedNestedResultMaps(MybatisConfiguration.java:318) ~[mybatis-plus-core-3.4.3.1.jar:3.4.3.1] at com.baomidou.mybatisplus.core.MybatisConfiguration.addResultMap(MybatisConfiguration.java:222) ~[mybatis-plus-core-3.4.3.1.jar:3.4.3.1] at org.apache.ibatis.builder.MapperBuilderAssistant.addResultMap(MapperBuilderAssistant.java:209) ~[mybatis-3.5.6.jar:3.5.6] at org.apache.ibatis.builder.ResultMapResolver.resolve(ResultMapResolver.java:47) ~[mybatis-3.5.6.jar:3.5.6] at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:289) ~[mybatis-3.5.6.jar:3.5.6] at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:254) ~[mybatis-3.5.6.jar:3.5.6] at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements(XMLMapperBuilder.java:246) ~[mybatis-3.5.6.jar:3.5.6] at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:119) ~[mybatis-3.5.6.jar:3.5.6] at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java:95) ~[mybatis-3.5.6.jar:3.5.6] at com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean.buildSqlSessionFactory(MybatisSqlSessionFactoryBean.java:593) ~[mybatis-plus-extension-3.4.3.1.jar:3.4.3.1] at com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean.afterPropertiesSet(MybatisSqlSessionFactoryBean.java:431) ~[mybatis-plus-extension-3.4.3.1.jar:3.4.3.1] at com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean.getObject(MybatisSqlSessionFactoryBean.java:628) ~[mybatis-plus-extension-3.4.3.1.jar:3.4.3.1] at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?] at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType(AbstractAutowireCapableBeanFactory.java:1501) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1399) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:601) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.6.jar:5.3.6] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.6.jar:5.3.6] ... 20 more

Comment From: babysinan

同问

Comment From: zyzyzy523

@babysinan 我看了下，是有个人提了优化的代码的PR，看了他提交的代码也没优化啥，还改出问题了，我项目都起不来了。

Comment From: qmdx

请使用版本 3.4.4.3-SNAPSHOT 试试

Comment From: zyzyzy523

@qmdx 3.4.4.3-SNAPSHOT没有问题

Comment From: Pengap

xml resultMap 只要有嵌套的节点，就强转错误了

Comment From: qmdx

xml resultMap 只要有嵌套的节点，就强转错误了

请使用版本 3.4.4.3-SNAPSHOT 试试

Comment From: Pengap

xml resultMap 只要有嵌套的节点，就强转错误了

请使用版本 3.4.4.3-SNAPSHOT 试试

回退到上个版本了

Comment From: qmdx

xml resultMap 只要有嵌套的节点，就强转错误了

请使用版本 3.4.4.3-SNAPSHOT 试试

回退到上个版本了

你测下，是否解决你的问题

Comment From: lishangbu

xml resultMap 只要有嵌套的节点，就强转错误了

请使用版本 3.4.4.3-SNAPSHOT 试试

回退到上个版本了

你测下，是否解决你的问题

同样的问题，不过使用3.4.4.3-SNAPSHOT已经可以了

Comment From: Second-dimension

麻烦问一下什么时间点会发版修复这个问题 maven依赖形式的 @qmdx

Comment From: qmdx

麻烦问一下什么时间点会发版修复这个问题 maven依赖形式的 @qmdx

会尽快发布

Comment From: zyzyzy523

@qmdx 您好，请问最新的版本什么时候会发布呢？

Comment From: YiuTerran

目前只能回滚版本了

Comment From: r13ljj

麻烦先把3.4.4.3-SNAPSHOT 发布一下到阿里私服，谢谢

Comment From: liu-xinhui

请使用版本 3.4.4.3-SNAPSHOT 试试

    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.4.4.3-SNAPSHOT</version>
    </dependency>

找不到这个版本呀

Comment From: qmdx

请使用版本 3.4.4.3-SNAPSHOT 试试

<dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.4.3-SNAPSHOT</version> </dependency>

找不到这个版本呀

查看文档，快照版本的使用

Comment From: xgj1988

这个问题还没解决吗？速度太慢了。

Comment From: qmdx

版本 3.4.3.2 已发布，请升级验证修复该问题，有任何问题 issue 该问题关闭！

Comment From: xgj1988

3.4.3.2 出现如下问题：

Caused by: java.sql.SQLException: Conversion not supported for type java.io.Serializable at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) at com.mysql.cj.jdbc.result.ResultSetImpl.getObject(ResultSetImpl.java:1476) at com.mysql.cj.jdbc.result.ResultSetImpl.getObject(ResultSetImpl.java:1483) at com.alibaba.druid.pool.DruidPooledResultSet.getObject(DruidPooledResultSet.java:1777) at sun.reflect.GeneratedMethodAccessor39.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.ibatis.logging.jdbc.ResultSetLogger.invoke(ResultSetLogger.java:69) at com.sun.proxy.$Proxy134.getObject(Unknown Source) at com.baomidou.mybatisplus.core.handlers.MybatisEnumTypeHandler.getNullableResult(MybatisEnumTypeHandler.java:118) at com.baomidou.mybatisplus.core.handlers.MybatisEnumTypeHandler.getNullableResult(MybatisEnumTypeHandler.java:49)