springboot项目mapper注入失败或url不存在

新建springboot项目中遇到的问题 (前提)controller、service、dao、entity和xml都已经建立完成，application已经配置，mybatis-config已经配置完成 1、启动失败 错误信息：

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APPLICATION FAILED TO START
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Description:

Field tAccountMapper in com.lxh.metaverse.controller.TAccountController required a bean of type 'com.lxh.metaverse.dao.TAccountMapper' that could not be found.

The injection point has the following annotations:
	- @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'com.lxh.metaverse.dao.TAccountMapper' in your configuration.

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APPLICATION FAILED TO START
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Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
	If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
	If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).


进程已结束,退出代码0

定位：运行之后会生成一个target文件夹，里面的classes文件中应该包含src中的文件以及resource中的配置文件，检查classes中文件是否存在缺失。 经过检查，确实缺少了application配置文件 解决方法：检查pom文件中build结构下是否存在resources节点，如果不存在，需要加上以下配置，如果存在，检查配置是否正确

注：我的mapper的xml文件是放在resources下面的，所以我多加了一个**/**/*.xml的配置

    
        src/main/resources
        
            **/*
        
    
    
        src/main/resources
        
            **/**/*.xml
        
    

配置完成之后，重新编译，target的classes下面果然已经有了application配置文件，项目也已经启动成功