Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-05-11 08:55:38.327 ERROR 11512 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
Caused by: java.lang.IllegalArgumentException: Unable to set initialisation parameters for filter due to null name and/or value. Name [loginUsername], Value [null]
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非常高兴有机会回答你的问题
你问题中的错误已经很明确了，关键的信息是：
Caused by: java.lang.IllegalArgumentException: Unable to set initialisation parameters for filter due to null name and/or value. Name [loginUsername], Value [null]
就是不能初始化参数：loginUsername
你要查找到这个参数的设值，检查一下逻辑，然后给他初始化就好了
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-11-07 17:28:15.615 ERROR 20668 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
APPLICATION FAILED TO START
Description:
An attempt was made to call a method that does not exist. The attempt was made from the following location:
org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration.themeResolver(WebMvcAutoConfiguration.java:486)
The following method did not exist:
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration.themeResolver()Lorg/springframework/web/servlet/ThemeResolver;
The method's class, org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration, is available from the following locations:
jar:file:/D:/maven/repository/org/springframework/spring-webmvc/5.2.3.RELEASE/spring-webmvc-5.2.3.RELEASE.jar!/org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class
The class hierarchy was loaded from the following locations:
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: file:/D:/maven/repository/org/springframework/spring-webmvc/5.2.3.RELEASE/spring-webmvc-5.2.3.RELEASE.jar
org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport: file:/D:/maven/repository/org/springframework/spring-webmvc/5.2.3.RELEASE/spring-webmvc-5.2.3.RELEASE.jar
Action:
Correct the classpath of your application so that it contains a single, compatible version of org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration
Process finished with exit code 1