Spring boot勉強中での質問
Q&A
Closed
解決したいこと
Spring解体新書という書籍で勉強中に6章着手中でのエラー発生
ログイン画面からの新規登録画面を押下するとエラーが発生しています。
解決方法を教えて下さい。
ボタンの位置もおかしいですが、、
本来はレイアウトは以下のようになるのが正解です。
発生している問題・エラー
2024-09-20T07:17:13.519+09:00[0;39m [31mERROR[0;39m [35m26552[0;39m [2m---[0;39m [2m[SpringBootSample] [nio-8080-exec-5][0;39m [2m[0;39m[36mo.a.c.c.C.[.[.[/].[dispatcherServlet] [0;39m [2m:[0;39m Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "class path resource [templates/user/signup.html]")] with root cause
org.springframework.expression.spel.SpelEvaluationException: EL1007E: Property or field 'value' cannot be found on null
at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:225) ~[spring-expression-6.1.12.jar:6.1.12]
at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:112) ~[spring-expression-6.1.12.jar:6.1.12]
at org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorValueRef.getValue(PropertyOrFieldReference.java:417) ~[spring-expression-6.1.12.jar:6.1.12]
at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:97) ~[spring-expression-6.1.12.jar:6.1.12]
at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:114) ~[spring-expression-6.1.12.jar:6.1.12]
at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:338) ~[spring-expression-6.1.12.jar:6.1.12]
at org.thymeleaf.spring6.expression.SPELVariableExpressionEvaluator.evaluate(SPELVariableExpressionEvaluator.java:265) ~[thymeleaf-spring6-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.standard.expression.VariableExpression.executeVariableExpression(VariableExpression.java:166) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:66) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.standard.expression.Expression.execute(Expression.java:109) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.standard.expression.Expression.execute(Expression.java:138) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.standard.processor.AbstractStandardExpressionAttributeTagProcessor.doProcess(AbstractStandardExpressionAttributeTagProcessor.java:144) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.util.ProcessorConfigurationUtils$ElementTagProcessorWrapper.process(ProcessorConfigurationUtils.java:633) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.engine.ProcessorTemplateHandler.handleStandaloneElement(ProcessorTemplateHandler.java:918) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.engine.TemplateHandlerAdapterMarkupHandler.handleStandaloneElementEnd(TemplateHandlerAdapterMarkupHandler.java:260) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler$InlineMarkupAdapterPreProcessorHandler.handleStandaloneElementEnd(InlinedOutputExpressionMarkupHandler.java:256) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.standard.inline.OutputExpressionInlinePreProcessorHandler.handleStandaloneElementEnd(OutputExpressionInlinePreProcessorHandler.java:169) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler.handleStandaloneElementEnd(InlinedOutputExpressionMarkupHandler.java:104) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.attoparser.HtmlVoidElement.handleOpenElementEnd(HtmlVoidElement.java:92) ~[attoparser-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.attoparser.HtmlMarkupHandler.handleOpenElementEnd(HtmlMarkupHandler.java:297) ~[attoparser-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.attoparser.MarkupEventProcessorHandler.handleOpenElementEnd(MarkupEventProcessorHandler.java:402) ~[attoparser-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.attoparser.ParsingElementMarkupUtil.parseOpenElement(ParsingElementMarkupUtil.java:159) ~[attoparser-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.attoparser.MarkupParser.parseBuffer(MarkupParser.java:710) ~[attoparser-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.attoparser.MarkupParser.parseDocument(MarkupParser.java:301) ~[attoparser-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.attoparser.MarkupParser.parse(MarkupParser.java:257) ~[attoparser-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:230) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parseStandalone(AbstractMarkupTemplateParser.java:100) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:666) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1103) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1077) ~[thymeleaf-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.spring6.view.ThymeleafView.renderFragment(ThymeleafView.java:372) ~[thymeleaf-spring6-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.thymeleaf.spring6.view.ThymeleafView.render(ThymeleafView.java:192) ~[thymeleaf-spring6-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1432) ~[spring-webmvc-6.1.12.jar:6.1.12]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1168) ~[spring-webmvc-6.1.12.jar:6.1.12]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1106) ~[spring-webmvc-6.1.12.jar:6.1.12]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979) ~[spring-webmvc-6.1.12.jar:6.1.12]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) ~[spring-webmvc-6.1.12.jar:6.1.12]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903) ~[spring-webmvc-6.1.12.jar:6.1.12]
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564) ~[tomcat-embed-core-10.1.28.jar:6.0]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) ~[spring-webmvc-6.1.12.jar:6.1.12]
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) ~[tomcat-embed-core-10.1.28.jar:6.0]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:195) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) ~[tomcat-embed-websocket-10.1.28.jar:10.1.28]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-6.1.12.jar:6.1.12]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.1.12.jar:6.1.12]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-6.1.12.jar:6.1.12]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.1.12.jar:6.1.12]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-6.1.12.jar:6.1.12]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.1.12.jar:6.1.12]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:384) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:904) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1741) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) ~[tomcat-embed-core-10.1.28.jar:10.1.28]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
該当するソースコード
■signup.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<meta>
<meta charset="UTF-8">
</meta>
<meta name="viewport" content="width=device-width, initail-scale=1, shrink-to-fit=no">
<!--CCS読込-->
<link rel="stylesheet" th:href="@{/webjars/bootstrap/css/bootstrap.min.css}">
<link rel="stylesheet" th:href="@{/css/login/login.css}">
<!--JS読込-->
<script th:src="@{webjars/jquery/jquery.min.js}" defer></script>
<script th.src="@{webjars/bootstrap/css/bootstrap.min.js}" defer></script>
<title>ユーザ登録</title>
</head>
<body class="bg-light">
<div class="text-center">
<form id="signup-form" method="post" action="/user/signup" class="form-signup">
<h1 class="text-center">ユーザ登録</h1>
<!--ユーザID-->
<div class="form-group">
<label for="userId">ユーザId</label>
<input type="text" class="form-control">
</div>
<!--パスワード-->
<div class="form-group">
<label for="password">パスワード</label>
<input type="text" class="form-control">
</div>
<!--ユーザー名-->
<div class="form-group">
<label for="userName">ユーザー名</label>
<input type="text" class="form-control">
</div>
<!--誕生日-->
<div class="form-group">
<label for="birthday">誕生日</label>
<input type="text" class="form-control">
</div>
<!--年齢-->
<div class="form-group">
<label for="age">年齢</label>
<input type="text" class="form-control">
</div>
<!--性別-->
<div class="form-group">
<div tj:each="item : ${genderMap}" class="form-check-inline">
<input type="radio" class="form-check-input" th:value="${item.value}">
<label class="form-check-label" th:text="${item.key}"></label>
</div>
</div>
<!--登録ボタン-->
<input type="submit" value="ユーザ登録" class="btn btn-primary w-100 mt-3" />
</div>
</form>
</body>
</html>
自分で試したこと
本通りに構造や、ソースは記載できていると思っています。
新規登録はこちらの表示位置もおかしいですが、解決できていません。。
アドバイス頂けるとありがたいです。よろしくおねがいします。
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