这个异常的问题源比较多，所以如果我的方法不能解决，请自行百度其他方法

@TOC

项目场景：

提示：这里简述项目相关背景：
这个问题遇到好多次了，一直没能记录下来，今天又碰到了

Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug’ enabled.
ERROR 1572 — [ restartedMain] o.s.boot.SpringApplication : Application run failed

问题描述：

SpringBoot 服务启动的时候报错：

下面是错误报告我用回车隔开方便检查

 Error creating bean with name 'userAction': 
Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.

UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': 
Unsatisfied dependency expressed through field 'mapper'; 
nested exception is org.springframework.beans.factory.

UnsatisfiedDependencyException: Error creating bean with name 'userMapper' defined in file[E:\桌面\springbootdemo\target\classes\cn\edu\neu\springbootdemo\mapper\UserMapper.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:\桌面\springbootdemo\target\classes\mapper\UserMapper.xml]'; 

nested exception is org.apache.ibatis.builder.
BuilderException: Error creating document instance.  Cause: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 36;
在 XML 声明中的编码伪属性前面必须有空格。

原因分析：Caused by

这个问题得具体问题具体分析，得看下面那些报错什么意思，不能直接去网上找解决办法
刚才也是找了好多博主写的文章都没解决
比如说我的报错信息是：
创建名为 “userAction” 的 bean 时出错
创建名为“userServiceImpl”的bean时出错
定义的名为“sqlSessionFactory”的bean时出错
在 XML格式声明中的编码伪属性前面必须有空格

解决方案：

检查代码

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