使用mybatis逆向工程生成代码的问题

傷城~ 2023-09-30 08:11 12阅读 0赞

今天在练习springboot集成mybatis框架的时候使用了逆向工程生成代码，自己看成功生成了那几个类后就放心做了下去，结果在启动项目时报错：

2022-03-05 17:09:29.685 INFO 3620 --- \[ main\] com.longtong.Application : Starting Application using Java 1.8.0\_60 on LONGTONG with PID 3620 (E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes started by SAMSUNG in E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot)  
2022-03-05 17:09:29.689 INFO 3620 --- \[ main\] com.longtong.Application : No active profile set, falling back to 1 default profile: "default"  
2022-03-05 17:09:30.679 INFO 3620 --- \[ main\] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 9090 (http)  
2022-03-05 17:09:30.687 INFO 3620 --- \[ main\] o.apache.catalina.core.StandardService : Starting service \[Tomcat\]  
2022-03-05 17:09:30.687 INFO 3620 --- \[ main\] org.apache.catalina.core.StandardEngine : Starting Servlet engine: \[Apache Tomcat/9.0.58\]  
2022-03-05 17:09:30.763 INFO 3620 --- \[ main\] o.a.c.c.C.\[.\[localhost\].\[/myboot\] : Initializing Spring embedded WebApplicationContext  
2022-03-05 17:09:30.763 INFO 3620 --- \[ main\] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1003 ms  
Logging initialized using 'class org.apache.ibatis.logging.stdout.StdOutImpl' adapter.  
2022-03-05 17:09:31.016 WARN 3620 --- \[ main\] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentServiceImpl': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'studentMapper' defined in file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\com\\longtong\\mapper\\StudentMapper.class\]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource \[org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class\]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate \[org.apache.ibatis.session.SqlSessionFactory\]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.longtong.mapper.StudentMapper.BaseResultMap  
2022-03-05 17:09:31.018 INFO 3620 --- \[ main\] o.apache.catalina.core.StandardService : Stopping service \[Tomcat\]  
2022-03-05 17:09:31.030 INFO 3620 --- \[ main\] ConditionEvaluationReportLoggingListener :

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.  
2022-03-05 17:09:31.053 ERROR 3620 --- \[ main\] o.s.boot.SpringApplication : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentServiceImpl': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'studentMapper' defined in file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\com\\longtong\\mapper\\StudentMapper.class\]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource \[org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class\]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate \[org.apache.ibatis.session.SqlSessionFactory\]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.longtong.mapper.StudentMapper.BaseResultMap  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessProperties(CommonAnnotationBeanPostProcessor.java:332) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1431) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~\[spring-boot-2.6.4.jar:2.6.4\]  
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) \[spring-boot-2.6.4.jar:2.6.4\]  
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) \[spring-boot-2.6.4.jar:2.6.4\]  
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) \[spring-boot-2.6.4.jar:2.6.4\]  
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) \[spring-boot-2.6.4.jar:2.6.4\]  
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) \[spring-boot-2.6.4.jar:2.6.4\]  
at com.longtong.Application.main(Application.java:14) \[classes/:na\]  
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentServiceImpl': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'studentMapper' defined in file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\com\\longtong\\mapper\\StudentMapper.class\]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource \[org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class\]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate \[org.apache.ibatis.session.SqlSessionFactory\]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.longtong.mapper.StudentMapper.BaseResultMap  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessProperties(CommonAnnotationBeanPostProcessor.java:332) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1431) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:544) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:520) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:673) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:228) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessProperties(CommonAnnotationBeanPostProcessor.java:329) ~\[spring-context-5.3.16.jar:5.3.16\]  
... 17 common frames omitted  
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'studentMapper' defined in file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\com\\longtong\\mapper\\StudentMapper.class\]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource \[org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class\]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate \[org.apache.ibatis.session.SqlSessionFactory\]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.longtong.mapper.StudentMapper.BaseResultMap  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType(AbstractAutowireCapableBeanFactory.java:1534) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1417) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveBeanByName(AbstractAutowireCapableBeanFactory.java:479) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:550) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:520) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:673) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:228) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessProperties(CommonAnnotationBeanPostProcessor.java:329) ~\[spring-context-5.3.16.jar:5.3.16\]  
... 33 common frames omitted  
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource \[org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class\]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate \[org.apache.ibatis.session.SqlSessionFactory\]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.longtong.mapper.StudentMapper.BaseResultMap  
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType(AbstractAutowireCapableBeanFactory.java:1519) ~\[spring-beans-5.3.16.jar:5.3.16\]  
... 47 common frames omitted  
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate \[org.apache.ibatis.session.SqlSessionFactory\]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.longtong.mapper.StudentMapper.BaseResultMap  
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~\[spring-beans-5.3.16.jar:5.3.16\]  
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~\[spring-beans-5.3.16.jar:5.3.16\]  
... 60 common frames omitted  
Caused by: org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.longtong.mapper.StudentMapper.BaseResultMap  
at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:613) ~\[mybatis-spring-2.0.7.jar:2.0.7\]  
at org.mybatis.spring.SqlSessionFactoryBean.afterPropertiesSet(SqlSessionFactoryBean.java:491) ~\[mybatis-spring-2.0.7.jar:2.0.7\]  
at org.mybatis.spring.SqlSessionFactoryBean.getObject(SqlSessionFactoryBean.java:633) ~\[mybatis-spring-2.0.7.jar:2.0.7\]  
at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration.sqlSessionFactory(MybatisAutoConfiguration.java:188) ~\[mybatis-spring-boot-autoconfigure-2.2.2.jar:2.2.2\]  
at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration$$EnhancerBySpringCGLIB$$48480c81.CGLIB$sqlSessionFactory$2(<generated>) ~\[mybatis-spring-boot-autoconfigure-2.2.2.jar:2.2.2\]  
at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration$$EnhancerBySpringCGLIB$$48480c81$$FastClassBySpringCGLIB$$d6edbaa2.invoke(<generated>) ~\[mybatis-spring-boot-autoconfigure-2.2.2.jar:2.2.2\]  
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~\[spring-core-5.3.16.jar:5.3.16\]  
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331) ~\[spring-context-5.3.16.jar:5.3.16\]  
at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration$$EnhancerBySpringCGLIB$$48480c81.sqlSessionFactory(<generated>) ~\[mybatis-spring-boot-autoconfigure-2.2.2.jar:2.2.2\]  
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~\[na:1.8.0\_60\]  
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~\[na:1.8.0\_60\]  
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~\[na:1.8.0\_60\]  
at java.lang.reflect.Method.invoke(Method.java:497) ~\[na:1.8.0\_60\]  
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~\[spring-beans-5.3.16.jar:5.3.16\]  
... 61 common frames omitted  
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file \[E:\\Java\\IntelliJ IDEA 2019.3.3\\longtong\_SpringBoot\\019\_springboot\_transaction\\target\\classes\\mapper\\StudentMapper.xml\]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.longtong.mapper.StudentMapper.BaseResultMap  
at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:123) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java:95) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:611) ~\[mybatis-spring-2.0.7.jar:2.0.7\]  
... 74 common frames omitted  
Caused by: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.longtong.mapper.StudentMapper.BaseResultMap  
at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:1037) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:993) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.apache.ibatis.session.Configuration.addResultMap(Configuration.java:749) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.apache.ibatis.builder.MapperBuilderAssistant.addResultMap(MapperBuilderAssistant.java:209) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.apache.ibatis.builder.ResultMapResolver.resolve(ResultMapResolver.java:47) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:289) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:254) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements(XMLMapperBuilder.java:246) ~\[mybatis-3.5.9.jar:3.5.9\]  
at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:119) ~\[mybatis-3.5.9.jar:3.5.9\]  
... 76 common frames omitted

我们查看第一个Caused by：

![4907735823a14c9f92c321ef29729a53.png][]

通过翻译可知道：

![ed777e3626b44d44a5e082de662fcf58.png][]

我的XXXMapper.xml里面内容重复了。我找到文件一看，果然是重复了，可能是自己不小心运行了两次逆向工程模板插件。因为逆向工程运行第二次不会覆盖原来生成的代码，而是追加。

删掉多余的内容，成功运行了。

[4907735823a14c9f92c321ef29729a53.png]: https://img-blog.csdnimg.cn/4907735823a14c9f92c321ef29729a53.png
[ed777e3626b44d44a5e082de662fcf58.png]: https://img-blog.csdnimg.cn/ed777e3626b44d44a5e082de662fcf58.png