SpringBoot项⽬jdk9运⾏报错，怎么处理都不⾏
jdk9与jdk8相⽐有很⼤的区别
JDK8：JDK8的部署是⼀个单体模式，即使项⽬内容少，也需要⼀整套的JRE环境。
JDK9：JDK9引⼊模块后，能将所有的类组织成模块形式。在新建项⽬时，不再需要整套的JRE环境。
并且jdk9在发布的时候有⼀些JDK8中的jar依赖没有集成进去，因此在使⽤⼀些版本的Spring Boot项⽬的时候就会报⼀些jar包缺失的错误。
ApplicationContextException:
Unable to embedded container; nested exception is BeanCreationException:jdk怎么使用
Error creating bean with'tomcatEmbeddedServletContainerFactory' defined in class path resource
[org/springframework/boot/autoconfigure/web/EmbeddedServletContainerAutoConfiguration$EmbeddedTomcat.class]:
Initialization of bean failed; nested exception is UnsatisfiedDependencyException: Error creating bean with'org.s pringframework.boot.autoconfigure.web.HttpEncodingAutoConfiguration':
Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with
'ding-org.springframework.boot.autoconfigure.web.HttpEncodingProperties': Initialization of bean
failed; nested exception is NoClassDefFoundError: javax/xml/bind/ValidationException; nested exception is B eanCreationException: Error creating bean with 'ding-
HttpEncodingProperties': Initialization of bean failed; nested exception is
NoClassDefFoundError: javax/xml/bind/ValidationException
根本的原因就是jdk9的jar包的缺失。
解决⽅法
在项⽬的l⽂件中引⼊缺失的jar包：
<!-- jdk9 缺失的jar包 -->
<dependency>
<groupId&l.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>l.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>l.bind</groupId>
<artifactId>jaxb-core</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
然后重新启动项⽬！！
2022-02-2212:44:29.375  INFO 12020---[          main].RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repo sitory configuration mode!
2022-02-2212:44:29.375  INFO 12020---[          main].RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAU LT mode.
2022-02-2212:44:29.423  INFO 12020---[          main].RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 27ms. Fou nd 0 Redis repository interfaces.
2022-02-2212:44:29.995  INFO 12020---[          main]TomcatWebServer  : Tomcat initialized with(s):8082(http)
2022-02-2212:44:30.012  INFO 12020---[          main]StandardService  : Starting service [Tomcat]
2022-02-2212:44:30.012  INFO 12020---[          main]StandardEngine  : Starting Servlet engine:[Apache Tomcat/9.0.35]
启动成功！！

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