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IllegalStateException: Ambiguous mapping. Cannot map 'indexController' method
発生した時のログとソースコード このように、起動時に出現するエラーです。 $ ./gradlew bootRun Caused by: java.lang.IllegalStateException: ...
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SpringBoot-thymeleafでjava.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'xxx' available as request attribute
IllegalStateExceptionのの出力例 Whitelabel Error Page This application has no explicit mapping for /error ...
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javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint 'javax.validation.constraints.NotBlank' validating type 'xxx'. Check configuration for 'yyy'
UnexpectedTypeException: HV000030の発生ログ 2022-01-26 20:45:31.991 ERROR 71947 --- [nio-8080-exec-1] o.a ...
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SpringBoot起動時にConflictingBeanDefinitionException
ConflictingBeanDefinitionExceptionが発生した時のログ Caused by: org.springframework.context.annotation.Confli ...
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SpringBoot-Thymeleafのエラー TemplateInputException: Error resolving template [xxx], template might not exist or might not be accessible by any of the configured Template Resolvers
TemplateInputExceptionの発生例 2022-01-24 12:44:37.141 ERROR 37908 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[ ...
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SpringBootでparameter 0 of constructor in required a bean of type that could not be found.
発生時のログ *************************** APPLICATION FAILED TO START *************************** Descripti ...
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No adapter for handler [XxxController]: The DispatcherServlet configuration needs to include a HandlerAdapter that supports this ServletException: No adapter for handler の解決方法
エラーの発生理由 リクエストURLに対するハンドラーメソッドが定義されていません。 エラー画面に表示される内容 Whitelabel Error Page This application has n ...
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spring-maybatisのエラー・例外
MybatisでSpringBoot起動時にCaused by: org.apache.ibatis.builder.BuilderException: Error resolving class. ...
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SpringBootのポート指定方法 Web server failed to start. Port 8080 was already in use.
発生時のログ 2021-02-11 11:15:13.926 ERROR 10492 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReport ...