问题分析

  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。具体源码分析见本文 源码分析 一节。

  如本文后续的 源码分析 一节所示。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。

  但实际上，这种重载支持上的不足纯粹是 MyBatis 自己在支持上的缺陷。Java 的反射实际上是可以直接识别出重载方法的。不仅可以获取一个类关于某个方法名的重载方法的个数，还可以直接获取不同的重载方法的方法签名。具体获取方法见本文 反射识别重载方法 一节。很可惜，MyBatis 官方没有邀请笔者参与 MyBatis 的开发，否则这种支持上的缺陷将不存在。

源码分析

反射识别重载方法

反射获取一个类的每个方法的重载个数

/**
 * 获取一个类的每个方法的重载个数
 *
 * @return HashMap<方法名, 该方法的重载个数>
 * @since 2024-10-11
 */
public static Map<String, Integer> getMethodOverloadCount(Class<?> clazz) {
    Map<String, Integer> methodCountMap = new HashMap<>();
    Method[] methods = clazz.getMethods();
    for (Method method : methods) {
        String methodName = method.getName();
        methodCountMap.put(methodName, methodCountMap.getOrDefault(methodName, 0) + 1);
    }
    return methodCountMap;
}

反射打印一个类每个方法的方法名和方法签名

/**
 * 打印一个类每个方法的方法名和方法签名。对于重载方法，这会将每个重载方法都打印出来
 *
 * @since 2024-10-11
 */
public static void printMethodSignatures(Class<?> clazz) {
    Method[] methods = clazz.getMethods();
    for (Method method : methods) {
        String methodName = method.getName();
        Class<?>[] parameterTypes = method.getParameterTypes();
        System.out.println("方法名: " + methodName + ", 方法签名: " + generateMethodSignature(methodName, parameterTypes));
    }
}

/**
 * 生成一个重载方法的方法签名字符串
 *
 * @since 2024-10-11
 */
private static String generateMethodSignature(String methodName, Class<?>[] parameterTypes) {
    StringBuilder signature = new StringBuilder();
    signature.append(methodName).append("(");
    boolean seen = false;
    String acc = null;
    for (Class<?> parameterType : parameterTypes) {
        String simpleName = parameterType.getSimpleName();
        if (!seen) {
            seen = true;
            acc = simpleName;
        } else {
            acc = acc + ", " + simpleName;
        }
    }
    String params = seen ? acc : "";
    signature.append(params).append(")");
    return signature.toString();
}

反射获取一个类每个方法的方法名和方法签名

/**
 * 获取一个类每个方法的方法名和其所有的方法签名。对于重载方法，这会将每个重载方法都列出来
 *
 * @return HashMap<方法名, 该方法的所有重载方法的方法签名>
 * @since 2024-10-11
 */
public static Map<String, List<String>> getMethodSignatures(Class<?> clazz) {
    Map<String, List<String>> methodSignaturesMap = new HashMap<>();
    Method[] methods = clazz.getMethods();
    for (Method method : methods) {
        String methodName = method.getName();
        String methodSignature = generateMethodSignature(methodName, method.getParameterTypes());
        methodSignaturesMap.computeIfAbsent(methodName, k -> new ArrayList<>()).add(methodSignature);
    }
    return methodSignaturesMap;
}

/**
 * 生成一个重载方法的方法签名字符串
 *
 * @since 2024-10-11
 */
private static String generateMethodSignature(String methodName, Class<?>[] parameterTypes) {
    StringBuilder signature = new StringBuilder();
    signature.append(methodName).append("(");
    String params = Arrays.stream(parameterTypes)
            .map(Class::getSimpleName)
            .reduce((a, b) -> a + ", " + b)
            .orElse("");
    signature.append(params).append(")");
    return signature.toString();
}

报错的具体内容

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 failed

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)
	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