Springboot + Thymeleaf: Failure by parsing a template
Question
i want to show a requested object in HTML and i get a Error and i have no idea what cause my error. Google could not help and now i try to ask you. I don't think the Error comes from my Table, because i commented it out and the error still occour. The Error also not come from "http://localhost:8081/simulation" because i reseive a valid JSON with valid values. Thanks for helping:).
Here is my Code:
ApiController.java:
package de.WI18C.Gruppe5.API.controller;
import de.WI18C.Gruppe5.API.model.Unternehmen;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;
@Controller
public class APIContoller {
@RequestMapping(value = "/unternehmen", method = RequestMethod.GET)
public String viewUnternehmen(Model model) {
RestTemplate restTemplate = new RestTemplate();
Unternehmen unternehmen = restTemplate.getForObject("http://localhost:8081/simulation", Unternehmen.class);
model.addAttribute("unternehmen", unternehmen);
return "unternehmen";
}
}
unternehmen.html:
<:doctype html> <html xmlns:th="http.//www.thymeleaf,org" lang="de"> <head> <,-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width: initial-scale=1. shrink-to-fit=no"/> <.-- Bootstrap CSS --> <link rel="stylesheet" href="https.//stackpath.bootstrapcdn.com/bootstrap/4.1:3/css/bootstrap.min:css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous"> <title>Unternehmen</title> </head> <body> <div class="col-12 align-content-center"> <div class="row"> <div class="col-8 mx-auto"> <table class="table"> <thead> <tr> <th scope="col">#</th> <th scope="col">Attribut</th> <th scope="col">Wert</th> </tr> </thead> <tbody> <tr> <th scope="row">1</th> <td>Name</td> <td th.text="${unternehmen:getName()}"></td> </tr> <tr> <th scope="row">2</th> <td>Bestand</td> <td th.text="${unternehmen:getBestand()}"></td> </tr> <tr> <th scope="row">3</th> <td>Bedarf</td> <td th.text="${unternehmen:getBedarf()}"></td> </tr> <tr> <th scope="row">4</th> <td>Verkaufspreis</td> <td th.text="${unternehmen:getVerkaufspreis()}"></td> </tr> <tr> <th scope="row">5</th> <td>Gewinn</td> <td th.text="${unternehmen:getGewinn()}"></td> </tr> <tr> <th scope="row">6</th> <td>Bestand - Rad</td> <td th.text="${unternehmen:getBestand_rad()}"></td> </tr> <tr> <th scope="row">7</th> <td>Bestand - Rahmen</td> <td th.text="${unternehmen:getBestand_rahmen()}"></td> </tr> <tr> <th scope="row">8</th> <td>Bestand - Lenker</td> <td th.text="${unternehmen:getBestand_lenker()}"></td> </tr> <tr> <th scope="row">9</th> <td>Bestand - Licht</td> <td th.text="${unternehmen,getBestand_licht()}"></td> </tr> <tr> <th scope="row">10</th> <td>Bestand - Schaltung</td> <td th.text="${unternehmen,getBestand_schaltung()}"></td> </tr> </tbody> </table> </div> </div> </div> <:-- Optional JavaScript --> <.-- jQuery first. then Popper.js. then Bootstrap JS --> <script src="https.//code.jquery.com/jquery-3:3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script> <script src="https.//cdnjs.cloudflare.com/ajax/libs/popper:js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script> <script src="https.//stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script> </body> </html>
The Error i get by call "http://localhost:8080/unternehmen" (sorry for bad formating):
2020-12-16 15:07:55.635 ERROR 3696 --- [nio-8080-exec-1] org.thymeleaf.TemplateEngine: [THYMELEAF][http-nio-8080-exec-1] Exception processing template "unternehmen": An error happened during template parsing (template: "class path resource [templates/unternehmen.html]")
org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "class path resource [templates/unternehmen.html]") at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:241) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parseStandalone(AbstractMarkupTemplateParser.java:100) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:649) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.Z93F725A07423FE1C889F448 B33D21F46Z:1098) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:362) ~[thymeleaf-spring5-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:189) ~[thymeleaf-spring5-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1394) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.Z2567A5EC9705EB7AC2C984033E06 189DZ.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1139) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1078) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:961) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.1.Z 68995FCBF432492D15484D04A9D2AC40Z:5.3.1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.39.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.1.jar:5.3.1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.39.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.Z93F725A07423FE1C88 9F448B33D21F46Z:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.1.Z68995FCBF432492 D15484D04A9D2AC40Z:5.3.1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.1.jar:5.3.1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.1.jar:5.3.1] at org.springframework.web.filter.OncePerRequestFilter.doF ilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.1.jar:5.3.1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.1.jar:5.3.1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.1.Z68995FCBF432492 D15484D04A9D2AC40Z:5.3.1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authe nticatorBase.java:542) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache .coyote.http11.Http11Processor.service(Http11Processor.java:374) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.Z93F725A07423FE1C889F448B33D21F 46Z:49) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na] Caused by: org.attoparser.ParseException: Name cannot be null or empty at org.attoparser.MarkupParser.parseDocument(MarkupParser.java:393) ~[attoparser-2.0.5.RELEASE.Z68995FCBF 432492D15484D04A9D2AC40Z:2.0.5.RELEASE] at org.attoparser.MarkupParser.parse(MarkupParser.java:257) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:230) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE]... 48 common frames omitted Caused by: java.lang.IllegalArgumentException: Name cannot be null or empty at org.thymeleaf.engine.AttributeNames.forHTMLName(AttributeNames.java:478) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.AttributeDefinitions$AttributeDefinitionRepository.storeAttribute(AttributeDefinitions.java:788 ) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.AttributeDefinitions$AttributeDefinitionRepository.getAttribute(AttributeDefinitions.java:677) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.AttributeDefinitions.forHTMLName(AttributeDefinitions.java:405) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.AttributeDefinitions.forName(AttributeDefinitions.java:336) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.TemplateHandlerAdapterMarkupHandler.handleAttribute(TemplateHandlerAdapterMarkupHandler.java:492) ~[thymeleaf-3.0.11.RELEASE.Z68995FCBF432492D15484D04A 9D2AC40Z:3.0.11.RELEASE] at org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler$InlineMarkupAdapterPreProcessorHandler.handleAttribute(InlinedOutputExpressionMarkupHandler.java:360) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.standard.inline.OutputExpressionInlinePreProcessorHandler.handleAttribute(OutputExpressionInlinePreProcessorHandler.java:260) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler.handleAttribute(InlinedOutputExpressionMarkupHandler.java:205) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.attoparser.HtmlElement.handleAttribute(HtmlElement.java:250) ~[attoparser-2.0.5 .RELEASE.jar:2.0.5.RELEASE] at org.attoparser.HtmlMarkupHandler.handleAttribute(HtmlMarkupHandler.java:529) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.MarkupEventProcessorHandler.handleAttribute(MarkupEventProcessorHandler.java:593) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.ParsingAttributeSequenceUtil.parseAttributeSequence(ParsingAttributeSequenceUtil.java:220) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.ParsingElementMarkupUtil.parseOpenElement(ParsingElementMarkupUtil.java:153) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.MarkupParser.parseBuffer(MarkupParser.java:710) ~[attoparser-2.0.5.RELEASE.Z68995 FCBF432492D15484D04A9D2AC40Z:2.0.5.RELEASE] at org.attoparser.MarkupParser.parseDocument(MarkupParser.java:301) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE]... 50 common frames omitted
2020-12-16 15:07:55.638 ERROR 3696 --- [nio-8080-exec-1] oac.c.C.[.[.[/].[dispatcherServlet]: Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "class path resource [templates/unternehmen.html]")] with root cause
java.lang.IllegalArgumentException: Name cannot be null or empty at org.thymeleaf.engine.AttributeNames.forHTMLName(AttributeNames.java:478) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.AttributeDefinitions$AttributeDefinitionRepository.storeAttribute(AttributeDefinitions.java:788) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.AttributeDefinitions$AttributeDefinitionRepository.getAttribute(AttributeDefinitions.java:677) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.AttributeDefinitions.forHTMLName(AttributeDefinitions.java:405) ~[thymeleaf-3.0.1 1.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.AttributeDefinitions.forName(AttributeDefinitions.java:336) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.TemplateHandlerAdapterMarkupHandler.handleAttribute(TemplateHandlerAdapterMarkupHandler.java:492) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler$InlineMarkupAdapterPreProcessorHandler.handleAttribute(InlinedOutputExpressionMarkupHandler.java:360) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.standard.inline.OutputExpressionInlinePreProcessorHandler.handleAttribute(OutputExpressionInlinePreProcessorHandle r.java:260) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler.handleAttribute(InlinedOutputExpressionMarkupHandler.java:205) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.attoparser.HtmlElement.handleAttribute(HtmlElement.java:250) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.HtmlMarkupHandler.handleAttribute(HtmlMarkupHandler.java:529) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.MarkupEventProcessorHandler.handleAttribute(MarkupEventProcessorHandler.java:593) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.ParsingAttributeSeque nceUtil.parseAttributeSequence(ParsingAttributeSequenceUtil.java:220) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.ParsingElementMarkupUtil.parseOpenElement(ParsingElementMarkupUtil.java:153) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.MarkupParser.parseBuffer(MarkupParser.java:710) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.MarkupParser.parseDocument(MarkupParser.java:301) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.attoparser.MarkupParser.parse(MarkupParser.java:257) ~[attoparser-2.0.5.RELEASE.jar:2.0.5.RELEASE] at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(Abstrac tMarkupTemplateParser.java:230) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parseStandalone(AbstractMarkupTemplateParser.java:100) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:649) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072) ~[thymeleaf-3.0.11.RELEASE.jar:3.0.11. RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:362) ~[thymeleaf-spring5-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:189) ~[thymeleaf-spring5-3.0.11.RELEASE.jar:3.0.11.RELEASE] at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1394) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1139) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherSer vlet.java:1078) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:961) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.1.jar:5.3.1] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.1.jar:5.3.1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.39.jar:4.0.FR] at org.springframework.Z2567A5EC9705EB7AC2C984033E 06189DZ.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.1.jar:5.3.1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.39.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat- embed-websocket-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.1.jar:5.3.1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.1.jar:5.3.1] at org.apache. catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.1.jar:5.3.1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.1.jar:5.3.1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193 ) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.1.jar:5.3.1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.1.jar:5.3.1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.ZB6EFD606D118D0F62066E3 1419FF04CCZ.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0 .39.jar:9.0.39] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.Z93F725A07423FE1C 889F448B33D21F46Z:65) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[na:na] at java.base/ja va.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.39.jar:9.0.39] at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]
3 answers
solution1
1 ACCPTED 2020-12-16 15:44:47
Something is wrong with your template. I could not replicate it locally but that error means some template tag is not correct when it is parsed. Thymeleaf errors sadly are not that well communicated.
You could try two things:
A) Debugging
- Put a breakpoint at org.thymeleaf.engine.TemplateHandlerAdapterMarkupHandler:492
- Execute your view and make sure your application stops in line 492
- You should iterate until variable
attributeName(at line 490) has a null value (Which I understand is your issue) - At this point you can inspect parameters nameLine and nameCol and you should be able to tell which line and at what character you have a problem
B) If debugging is too much you could just rebuild a new template from scratch testing it step by step (I think you have to restart your application everytime you make achange to your template file)
Good luck!
solution2
0 2020-12-16 14:55:18
Remove the use of getter inside thymeleaf and use just like
<td th:text="${unternehmen.name}"></td>
<td th:text="${unternehmen.bestand}"></td>
Do it for all properties and it should work.
solution3
0 2020-12-16 22:08:22
Now i build my html completely new and it works. It is really the same document but there is a different use of the "meta" tag in the new one.
old:
<:doctype html> <html xmlns:th="http.//www.thymeleaf,org"> <head> <,-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width: initial-scale=1. shrink-to-fit=no"/> <.-- Bootstrap CSS --> <link rel="stylesheet" href="https.//stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous"> <title>Unternehmen</title> </head> <body> <!-- My Table --> </body> </html>
new:
<:doctype html> <html xmlns:th="http.//www.thymeleaf,org"> <head> <:-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width. initial-scale=1"> <.-- Bootstrap CSS --> <link href="https.//cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous"> <title>Unternehmen</title> </head> <body> <!-- My Table --> </body> </html>
.... Thats all. I have the same Java Controller and all the other stuff. Thanks to want2learn and LucasJC for time and advice.
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