使用MybatisPlus时发生异常：Invalid bound statement (not found)

先上结论：yml文件没有将原来的mybatis的配置更名为mybatis-plus

 

异常：

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): XXMapper.getCapitalTypeListAll

源码探寻：

首先断点打在调用mapper方法的地方

List<HashMap<String, Object>> capitalTypeData = configMapper.getCapitalTypeListAll();

继续走，进入MybatisMapperMethod.java类

public SqlCommand(Configuration configuration, Class<?> mapperInterface, Method method) {
    //methodName就是调用的方法名 getCapitalTypeListAll
    final String methodName = method.getName();
    //declaringClass就是 Mapper接口类
    final Class<?> declaringClass = method.getDeclaringClass();
    //问题出在这里 返回为空：原因是没有找到该接口类
    MappedStatement ms = resolveMappedStatement(mapperInterface, methodName, declaringClass,
        configuration);
    if (ms == null) {
        if (method.getAnnotation(Flush.class) != null) {
            name = null;
            type = SqlCommandType.FLUSH;
        } else {
            throw new BindingException("Invalid bound statement (not found): "
                + mapperInterface.getName() + "." + methodName);
        }
    } else {
        name = ms.getId();
        type = ms.getSqlCommandType();
        if (type == SqlCommandType.UNKNOWN) {
            throw new BindingException("Unknown execution method for: " + name);
        }
    }
}

private MappedStatement resolveMappedStatement(Class<?> mapperInterface, String methodName,
                                                   Class<?> declaringClass, Configuration configuration) {
        //XXMapper.xxMethod
        String statementId = mapperInterface.getName() + "." + methodName;
        //configuration有一个大集合，缓存了所有的Mapper及所有的方法 如图1.1
        if (configuration.hasStatement(statementId)) {
            return configuration.getMappedStatement(statementId);
        } else if (mapperInterface.equals(declaringClass)) {
            return null;
        }
        for (Class<?> superInterface : mapperInterface.getInterfaces()) {
            if (declaringClass.isAssignableFrom(superInterface)) {
                MappedStatement ms = resolveMappedStatement(superInterface, methodName,
                    declaringClass, configuration);
                if (ms != null) {
                    return ms;
                }
            }
        }
        return null;
    }
}

protected final Map<String, MappedStatement> mappedStatements = new StrictMap<MappedStatement>("Mapped Statements collection")
    .conflictMessageProducer((savedValue, targetValue) ->
        ". please check " + savedValue.getResource() + " and " + targetValue.getResource());

public boolean hasStatement(String statementName) {
  return hasStatement(statementName, true);
}

public boolean hasStatement(String statementName, boolean validateIncompleteStatements) {
  if (validateIncompleteStatements) {
    buildAllStatements();
  }
  return mappedStatements.containsKey(statementName);
}

问题就在这里 ，mappedStatements没有工程的mapper，原因就是没有扫描到，即定位到扫描时配置问题！

mybatis -> mybatis-plus 

问题解决！

图1.1