Springboot + thymeleaf: IllegalStateException can't even launch app - spring-boot

Question

I am trying to user thymeleaf in a springboot project, but I cannot even start the project. I have already worked with Thymeleaf, and that is why it seems strange to me. I am actually getting the following error:
2020-05-16 19:08:33.499 INFO 6564 --- [ restartedMain] com.mb.atalidas.AtalidasApplication : Starting AtalidasApplication on DESKTOP-P7SNKV8 with PID 6564 (C:\Users\Mikel\Desktop\MIKEL\PROYECTOS\GRAN VOLUMEN\Web Basic\Atalidas\target\classes started by Mikel in C:\Users\Mikel\Desktop\MIKEL\PROYECTOS\GRAN VOLUMEN\Web Basic\Atalidas)
2020-05-16 19:08:33.499 INFO 6564 --- [ restartedMain] com.mb.atalidas.AtalidasApplication : No active profile set, falling back to default profiles: default
2020-05-16 19:08:33.545 INFO 6564 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2020-05-16 19:08:33.545 INFO 6564 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2020-05-16 19:08:33.883 ERROR 6564 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
java.lang.IllegalStateException: Error processing condition on org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$ThymeleafDefaultConfiguration.templateEngine
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:60) ~[spring-boot-autoconfigure-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:184) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:144) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:120) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:331) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:236) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:280) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:96) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:706) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at com.mb.atalidas.AtalidasApplication.main(AtalidasApplication.java:10) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_191]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_191]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_191]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_191]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.3.0.RELEASE.jar:2.3.0.RELEASE]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$ThymeleafWebMvcConfiguration$ThymeleafViewResolverConfiguration] from ClassLoader [sun.misc.Launcher$AppClassLoader#764c12b6]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:358) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:414) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$2(AbstractAutowireCapableBeanFactory.java:743) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_191]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:742) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:681) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:649) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1608) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:526) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:497) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanNamesForType(OnBeanCondition.java:230) ~[spring-boot-autoconfigure-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:223) ~[spring-boot-autoconfigure-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:213) ~[spring-boot-autoconfigure-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:167) ~[spring-boot-autoconfigure-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:142) ~[spring-boot-autoconfigure-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-2.3.0.RELEASE.jar:2.3.0.RELEASE]
... 23 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/web/servlet/view/AbstractCachingViewResolver
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_191]
at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[na:1.8.0_191]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_191]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) ~[na:1.8.0_191]
at java.net.URLClassLoader.access$100(URLClassLoader.java:74) ~[na:1.8.0_191]
at java.net.URLClassLoader$1.run(URLClassLoader.java:369) ~[na:1.8.0_191]
at java.net.URLClassLoader$1.run(URLClassLoader.java:363) ~[na:1.8.0_191]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_191]
at java.net.URLClassLoader.findClass(URLClassLoader.java:362) ~[na:1.8.0_191]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_191]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_191]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_191]
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_191]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_191]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_191]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
... 39 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.web.servlet.view.AbstractCachingViewResolver
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_191]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_191]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_191]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_191]
... 55 common frames omitted
2020-05-16 19:08:33.898 WARN 6564 --- [ restartedMain] o.s.boot.SpringApplication : Unable to close ApplicationContext
java.lang.IllegalStateException: Failed to introspect Class [org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$ThymeleafWebMvcConfiguration$ThymeleafViewResolverConfiguration] from ClassLoader [sun.misc.Launcher$AppClassLoader#764c12b6]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:358) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:414) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$2(AbstractAutowireCapableBeanFactory.java:743) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_191]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:742) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:681) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:649) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1608) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:526) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:497) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:619) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:611) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1242) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:880) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:868) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:855) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:806) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at com.mb.atalidas.AtalidasApplication.main(AtalidasApplication.java:10) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_191]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_191]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_191]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_191]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.3.0.RELEASE.jar:2.3.0.RELEASE]
Caused by: java.lang.NoClassDefFoundError: org/springframework/web/servlet/view/AbstractCachingViewResolver
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_191]
at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[na:1.8.0_191]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_191]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) ~[na:1.8.0_191]
at java.net.URLClassLoader.access$100(URLClassLoader.java:74) ~[na:1.8.0_191]
at java.net.URLClassLoader$1.run(URLClassLoader.java:369) ~[na:1.8.0_191]
at java.net.URLClassLoader$1.run(URLClassLoader.java:363) ~[na:1.8.0_191]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_191]
at java.net.URLClassLoader.findClass(URLClassLoader.java:362) ~[na:1.8.0_191]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_191]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_191]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_191]
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_191]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_191]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_191]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
... 26 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.web.servlet.view.AbstractCachingViewResolver
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_191]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_191]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_191]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_191]
... 42 common frames omitted
I have the following POM:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.mb</groupId>
<artifactId>Atalidas</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Atalidas</name>
<description>Frontend and Backend Project</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- Spring Security -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<!-- do you like thymeleaf? -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!-- optional, it brings userful tags to display spring security stuff -->
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-springsecurity4</artifactId>
<version>3.0.4.RELEASE</version>
</dependency>
<!-- hot swapping, disable cache for template, enable live reload -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<!-- Optional, for bootstrap -->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.7</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
The controller is very simple:
package com.mb.atalidas.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
#Controller
public class DefaultController {
#GetMapping("/")
public String home1() {
return "/home";
}
#GetMapping("/home")
public String home() {
return "/home";
}
#GetMapping("/admin")
public String admin() {
return "/admin";
}
#GetMapping("/user")
public String user() {
return "/user";
}
#GetMapping("/about")
public String about() {
return "/about";
}
#GetMapping("/login")
public String login() {
return "/login";
}
#GetMapping("/403")
public String error403() {
return "/error/403";
}
}
I have googled this matter but can't find any solution. Please, could anyone help me? Thank you so much!

Answer 1

You are missing some dependencies. Add:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>