解决Spring Boot报错Mapped Statements collection already contains value for...Error while adding the mapp

解决Spring Boot报错Mapped Statements collection already contains value for...Error while adding the mapper

今天，在笔者刚刚编写完一个上万行的 SpringBoot 项目后，第一次运行时，一运行果然马上就报错了。笔者从来没有哪一次是代码编写完就一次性通过的，显然这次也不例外。经过这次报错得到的教训是：一定要及时勤劳地编写单元测试。把单元测试拖到所有 Bug 全部查完之后再编写没有任何意义。

笔者报错时的运行环境：

Spring Boot 2.6.3

mybatis-spring-boot-starter 2.2.0

JDK 17

Maven 3.8.3

IntelliJ IDEA 2021.3 (Ultimate Edition)

报错的具体内容较长，笔者已在文末给出。这个报错好像在暗示项目在运行时发生了循环依赖，具体出现在笔者编写的一个 Mapper 上。但是，笔者却并不认为是这样。因为笔者在此 SpringBoot 项目中，所有的 Bean 都是以默认方式创建的，这个时候，Bean 将会以 单例模式 来创建。在 单例模式 下，Bean 的创建是不会因为循环依赖而报错的。

在反复排查了很久才发现，原来原因出在笔者上述的那个 Mapper 中，定义了重载的方法，而Mapper 中的方法不能被重载，这与形参个数无关。得知这个原因的笔者也是震惊的，之前没想到 Mapper 还有这种限制。而这种限制出现的理由当然也很好反向推导。MyBatis 对 Mapper 进行动态代理的时候，使用了一种 ID 值来标识每个 SQL 语句，而这种 ID 值是只是由 Mapper 的类名和方法名来共同标识的，这不包括方法形参。具体源码分析如下：

如下图所示。MyBatis 首先是用 Mapper 的类名和方法名生成了一个 mappedStatementId，然后将此值传给了另一个函数的 id 值，之后用其构造了一个 MappedStatement 对象。由于不区分 Mapper 方法形参，所以最终导致在存储此 id 值时，在一个 HashMap 中报错。

报错的具体内容如下：

202x-xx-xx xx:xx:xx.xxx ERROR 16208 --- [           main] o.m.spring.mapper.MapperFactoryBean      : Error while adding the mapper 'interface XXX...XXX' to configuration.java.lang.IllegalArgumentException: Mapped Statements collection already contains value for XXX...XXX. please check XXX/XXX.java (best guess) and XXX/XXX.java (best guess)at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:1014) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:970) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.session.Configuration.addMappedStatement(Configuration.java:768) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.builder.MapperBuilderAssistant.addMappedStatement(MapperBuilderAssistant.java:297) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.lambda$parseStatement$2(MapperAnnotationBuilder.java:358) ~[mybatis-3.5.7.jar:3.5.7]at java.base/java.util.Optional.ifPresent(Optional.java:178) ~[na:na]at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parseStatement(MapperAnnotationBuilder.java:300) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parse(MapperAnnotationBuilder.java:132) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.binding.MapperRegistry.addMapper(MapperRegistry.java:72) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.session.Configuration.addMapper(Configuration.java:841) ~[mybatis-3.5.7.jar:3.5.7]at org.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:80) ~[mybatis-spring-2.0.6.jar:2.0.6]at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44) ~[spring-tx-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.15.jar:5.3.15]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.15.jar:5.3.15]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:414) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.6.3.jar:2.6.3]at XXX(XXX.java:12) ~[classes/:na]202x-xx-xx xx:xx:xx.xxx  WARN 16208 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'XXX' defined in file [XXX\XXX.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'XXX' defined in file [XXX\XXX.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'XXX' defined in file [XXX\XXX\XXX.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for XXX...XXX. please check XXX/XXX.java (best guess) and XXX/XXX.java (best guess)
202x-xx-xx xx:xx:xx.xxx  INFO 16208 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
202x-xx-xx xx:xx:xx.xxx  INFO 16208 --- [           main] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
202x-xx-xx xx:xx:xx.xxx ERROR 16208 --- [           main] o.s.boot.SpringApplication               : Application run failedorg.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'XXX' defined in file [XXX\XXX.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'XXX' defined in file [XXX\XXX.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'XXX' defined in file [XXX\XXX\XXX.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for XXX...XXX. please check XXX/XXX.java (best guess) and XXX/XXX.java (best guess)at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.15.jar:5.3.15]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.15.jar:5.3.15]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:414) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.6.3.jar:2.6.3]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.6.3.jar:2.6.3]at xxx(xxx.java:12) ~[classes/:na]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'xxx' defined in file [XXX\XXX.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'XXX' defined in file [XXX\XXX\XXX.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for XXX...XXX. please check XXX/XXX.java (best guess) and XXX/XXX.java (best guess)at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.15.jar:5.3.15]... 19 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'XXX' defined in file [XXX\XXX\XXX.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for XXX...XXX. please check XXX/XXX.java (best guess) and XXX/XXX.java (best guess)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.15.jar:5.3.15]... 33 common frames omitted
Caused by: java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for XXX...XXX. please check XXX/XXX.java (best guess) and XXX/XXX.java (best guess)at org.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:83) ~[mybatis-spring-2.0.6.jar:2.0.6]at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44) ~[spring-tx-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.15.jar:5.3.15]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.15.jar:5.3.15]... 44 common frames omitted
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for XXX...XXX. please check XXX/XXX.java (best guess) and XXX/XXX.java (best guess)at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:1014) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:970) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.session.Configuration.addMappedStatement(Configuration.java:768) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.builder.MapperBuilderAssistant.addMappedStatement(MapperBuilderAssistant.java:297) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.lambda$parseStatement$2(MapperAnnotationBuilder.java:358) ~[mybatis-3.5.7.jar:3.5.7]at java.base/java.util.Optional.ifPresent(Optional.java:178) ~[na:na]at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parseStatement(MapperAnnotationBuilder.java:300) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parse(MapperAnnotationBuilder.java:132) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.binding.MapperRegistry.addMapper(MapperRegistry.java:72) ~[mybatis-3.5.7.jar:3.5.7]at org.apache.ibatis.session.Configuration.addMapper(Configuration.java:841) ~[mybatis-3.5.7.jar:3.5.7]at org.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:80) ~[mybatis-spring-2.0.6.jar:2.0.6]... 47 common frames omitted

解决Spring Boot报错Mapped Statements collection already contains value for...Error while adding the mapp相关推荐

解决spring boot 报错问题:Disconnected from the target VM, address: ‘127.0.0.1:51596
本文是springboot项目启动时出现未连接目标地址,从网上看了一些原因,主要都是忘记添加web的依赖包或者端口号被占用,本人也进行了进程查看,发现在进程服务中确实存在一个pid对应的端口号占用了本 ...
Spring Boot 报错ThreadPoolTaskExecutor : Shutting down ExecutorService ‘applicationTaskExecutor‘
问题 Spring Boot 报错ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor' 原因 ...
解决Mybatis查询错误：Mapped Statements collection does not contain value for xxx
前言新手在使用mybatis注解开发的时候,往往容易出现各种错误. 上述提到的"Mapped Statements collection does not contain value fo ...
解决： Spring Boot报错 This application has no explicit mapping ... a fallback
前些天发现了一个巨牛的人工智能学习网站,通俗易懂,风趣幽默,忍不住分享一下给大家.点击跳转到教程. 启动spring boot然后访问页面的时候,出现如下错误: Whitelabel Error Pa ...
spring Boot报错之五种(不打包运行)
Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as ...
spring Boot 报错Failed to introspect Class [xxx] from ClassLoader
因为之前把redis单打成jar包放入一个项目,然后该项目的jar包在cmd命令行运行报错,该问题主要原因是:因为redis包是外部包,spring在加载bean时,找不到对应的class文件, 部署 ...
spring boot报错：Parameter 4 of constructor in xx required a bean of type ‘xx‘ that could not be found.
spring boot 项目启动服务时,报错: 根据报错提示,一直认为是 SpringBootApplication 没有扫描到对应的 bean 路径. 最后,仔细排查发现是粗心的问题,自定义的常量没 ...
Spring Boot 报错：Failed to configure a DataSource
一.报错信息如下这个异常在Spring Boot中比较常见,在初次完成项目的构建后,因为Spring Boot 的自动配置时,检查到我们添加了数据源(Mysql)的相关的依赖包,结果在我们的配置文件 ...
【Spring] Spring boot 报错 Unable to start ServletWebServerApplicationContext due to missing ServletWe
1.概述 spring 报错如下 Error starting ApplicationContext. To display the conditions report re-run your app ...

解决Spring Boot报错Mapped Statements collection already contains value for...Error while adding the mapp

解决Spring Boot报错Mapped Statements collection already contains value for...Error while adding the mapper

解决Spring Boot报错Mapped Statements collection already contains value for...Error while adding the mapp相关推荐

最新文章

热门文章