I have a JAR dependency that I am required to use. There is one component in that JAR that is interfering with a part of my Spring Boot application. I need to exclude that ONE component, and changing the component definition in the JAR dependency is not currently possible.
I have tried the following, but it does not work, the bean is still loaded:
#SpringBootApplication
#ComponentScan(useDefaultFilters = false, excludeFilters = [Filter(type = FilterType.ASSIGNABLE_TYPE, classes = [SomeBean::class])])
The bean is defined as:
#RestController
class SomeBean {
NOTE: These snippets are in Kotlin.
Try this
#SpringBootApplication(exclude = { SomeBean.class })
Can you do something like below to skip creating bean?
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.stereotype.Component;
#Component
public class MyBeanDefinitionRegistryPostProcessor implements BeanDefinitionRegistryPostProcessor {
#Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {}
#Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) {
registry.removeBeanDefinition("myBeanName");
}
}
Doesn't the #Bean/#Component/etc. or #Configuration have any Conditional annotation on it (e.g.: #ConditionalOnMissingBean, #ConditionalOnProperty, etc.)? That would be the right solution for this problem. Can you ask the maintainer to add proper conditions? So that you (and other users) don't need to hack this around.
There is a terrible hack though: BeanDefinitionRegistry#removeBeanDefinition
I am trying to build a spring boot web application. I want to refer a class from another jar. The class name is SalaryHandler.
I have done the following configuration in the class having
#SpringBootApplication annotation:
#Bean
public SalaryHandler iSalary() {
return new SalaryHandler();
}
In the class, where it is required, I have used autowiring annotation like this:
package hello;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import com.salary.SalaryHandler;
//#Service - not working
//#Component - not working
public class SalaryDelegatorImpl implements SalaryDelegator {
#Autowired
private SalaryHandler iSalary;
#Override
public void show() {
iSalary.testSalary();
}
}
The code is compiling fine, but when this iSalary object is used to call its method, nullpointer exception is thrown.
Just to note that SalaryHandler is present inside another jar and is not using any spring annotation, its code is as below:
package com.salary;
public class SalaryHandler implements ISalary {
public void testSalary() {
System.out.println("Salary test successful...");
}
}
you need to attempt Autowire with #Component. In order to get this to work, you'll have to annotate a method in your #Configuration class. Something like this should allow you to autowire the class:
#Configuration
#ComponentScan("com.package.where.my.class.is")
public class ConfigClass{
#Bean
public JPADataService jpaDataService(){
return new JPADataService();
}
}
I am able to fix this. The problem was somewhere inside code, I was calling SalaryDelegatorImpl using new operator(from inside a factory class), so that was not being managed by Spring. As a result, the #Autowired on SalaryHandler, was not working.
I changed my factory to be spring managed, and then it worked fine.
Thanks everyone for the support.
My project used spring-boot (1.4.0.release) and mybatis-spring-boot-starter. When I try to have some test code for controller, I always get a exception
Caused by: java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required
at org.springframework.util.Assert.notNull(Assert.java:115)
at org.mybatis.spring.support.SqlSessionDaoSupport.checkDaoConfig(SqlSessionDaoSupport.java:75)
at org.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:74)
at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
... 42 more`
But when I comment #MapperScan("com.toby.mapper"), it runs very well.
Here is my example class:
#MapperScan("com.toby.mapper")
#EnableTransactionManagement
#EnableConfigurationProperties(AppConfig.class)
#SpringBootApplication(scanBasePackages = "com.toby.configuration,com.toby.web.controller,com.toby.service,com.toby.dao")
public class Example {
public static void main(String[] args) throws Exception {
//new SpringApplicationBuilder().sources(Example.class).run(args);
SpringApplication application=new SpringApplication(Example.class);
application.addInitializers(new PropertyPasswordDecodingContextInitializer());
application.run(args);
}
}
Here is my test code:
package com.toby.web.controller;
import com.toby.common.config.AppConfig;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;
/**
* Created by Toby on 2016/8/10.
*/
#RunWith(SpringRunner.class)
#WebMvcTest(value = MyRestController.class)
public class MyRestControllerTests {
#Autowired
private MockMvc mvc;
#MockBean
private AppConfig appConfig;
#Test
public void testHome() throws Exception {
/*this.mvc.perform(get("/users").accept(MediaType.TEXT_PLAIN))
.andExpect(status().isOk()).andExpect(content().string("Honda Civic"));*/
}
}
I guess you've updated the description or I didn't read it properly the first time. #MapperScan is a mybatis specific annotation that triggers something but is missing some guard of some sort.
We had the same problem in boot actually. Let's say you put #EnableCaching on your main app. Because slicing disables all auto-configurations but a list of specific ones, the cache auto-configuration would not kick in and you'll get an exception because the CacheManager isn't found. To fix that issue, we've started to create some annotation to easily enable those. If you look at WebMbcTest you'll see it's annotated with AutoConfigureCache that's going to provide a dummy no-op cache manager unless specified otherwise.
Your problem is that the mybatis support is a third party integration and there isn't any support for that. Some solutions:
Change #WebMbvcTest to provide the class of another configuration class, effectivly disabling the use of your main spring boot app. Of course that class shouldn't define the #MapperScan annotation
Move the MapperScan (and anything that's not required with slicing) to another Configuration class. It could be a class in the same package as your app. Slicing won't scan those by default so you'll be fine. It's by far the easiest
Create an issue in the mybatis support so that they improve the auto-configuration to back-off (prevent this exception). I am not sure that's possible actually
Long story short, since #MapperScan is a way to tell mybatis to scan your entities, maybe you shouldn't add it on your main boot app if you use slicing. Because your #WebMbcTest doesn't want to use that obviously.
I used maven to do the tutorial https://spring.io/guides/gs/uploading-files/
All the codes I used was copied.
The Application can run, but I get the error:
Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback.
Tue Jun 30 17:24:02 CST 2015 There was an unexpected error (type=Not Found, status=404).
No message available
How can I fix it?
Make sure that your main class is in a root package above other classes.
When you run a Spring Boot Application, (i.e. a class annotated with #SpringBootApplication), Spring will only scan the classes below your main class package.
com
+- APP
+- Application.java <--- your main class should be here, above your controller classes
|
+- model
| +- user.java
+- controller
+- UserController.java
When we create a Spring boot application we annotate it with #SpringBootApplication annotation. This annotation 'wraps up' many other necessary annotations for the application to work. One such annotation is #ComponentScan annotation. This annotation tells Spring to look for Spring components and configure the application to run.
Your application class needs to be top of your package hierarchy, so that Spring can scan sub-packages and find out the other required components.
package com.test.spring.boot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
Below code snippet works as the controller package is under com.test.spring.boot package
package com.test.spring.boot.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
#RestController
public class HomeController {
#RequestMapping("/")
public String home(){
return "Hello World!";
}
}
Below code snippet does NOT Work as the controller package is NOT under com.test.spring.boot package
package com.test.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
#RestController
public class HomeController {
#RequestMapping("/")
public String home(){
return "Hello World!";
}
}
From Spring Boot documentation:
Many Spring Boot developers always have their main class annotated
with #Configuration, #EnableAutoConfiguration and #ComponentScan.
Since these annotations are so frequently used together (especially if
you follow the best practices above), Spring Boot provides a
convenient #SpringBootApplication alternative.
The #SpringBootApplication annotation is equivalent to using
#Configuration, #EnableAutoConfiguration and #ComponentScan with their
default attributes
You can solve this by adding an ErrorController in your application. You can have the error controller return a view that you need.
Error Controller in my application looks like below:
import org.springframework.boot.autoconfigure.web.ErrorAttributes;
import org.springframework.boot.autoconfigure.web.ErrorController;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
/**
* Basic Controller which is called for unhandled errors
*/
#Controller
public class AppErrorController implements ErrorController{
/**
* Error Attributes in the Application
*/
private ErrorAttributes errorAttributes;
private final static String ERROR_PATH = "/error";
/**
* Controller for the Error Controller
* #param errorAttributes
*/
public AppErrorController(ErrorAttributes errorAttributes) {
this.errorAttributes = errorAttributes;
}
/**
* Supports the HTML Error View
* #param request
* #return
*/
#RequestMapping(value = ERROR_PATH, produces = "text/html")
public ModelAndView errorHtml(HttpServletRequest request) {
return new ModelAndView("/errors/error", getErrorAttributes(request, false));
}
/**
* Supports other formats like JSON, XML
* #param request
* #return
*/
#RequestMapping(value = ERROR_PATH)
#ResponseBody
public ResponseEntity<Map<String, Object>> error(HttpServletRequest request) {
Map<String, Object> body = getErrorAttributes(request, getTraceParameter(request));
HttpStatus status = getStatus(request);
return new ResponseEntity<Map<String, Object>>(body, status);
}
/**
* Returns the path of the error page.
*
* #return the error path
*/
#Override
public String getErrorPath() {
return ERROR_PATH;
}
private boolean getTraceParameter(HttpServletRequest request) {
String parameter = request.getParameter("trace");
if (parameter == null) {
return false;
}
return !"false".equals(parameter.toLowerCase());
}
private Map<String, Object> getErrorAttributes(HttpServletRequest request,
boolean includeStackTrace) {
RequestAttributes requestAttributes = new ServletRequestAttributes(request);
return this.errorAttributes.getErrorAttributes(requestAttributes,
includeStackTrace);
}
private HttpStatus getStatus(HttpServletRequest request) {
Integer statusCode = (Integer) request
.getAttribute("javax.servlet.error.status_code");
if (statusCode != null) {
try {
return HttpStatus.valueOf(statusCode);
}
catch (Exception ex) {
}
}
return HttpStatus.INTERNAL_SERVER_ERROR;
}
}
The above class is based on Springs BasicErrorController class.
You can instantiate the above ErrorController like this in a #Configuration file:
#Autowired
private ErrorAttributes errorAttributes;
#Bean
public AppErrorController appErrorController(){return new AppErrorController(errorAttributes);}
You can choose override the default ErrorAttributes by implementing ErrorAttributes. But in most cases the DefaultErrorAttributes should suffice.
In my case the controller class was annotated with #Controller. Changing that to #RestController resolved the problem.
Basically #RestController is #Controller + #ResponseBody
So either use #RestController , or #Controller with #ResponseBody annotation with each method.
Some useful notes here : https://www.genuitec.com/spring-frameworkrestcontroller-vs-controller/
in my case it because of package position , meaning package of controller must be above main class package
if my main class package is package co.companyname.spring.tutorial; any controller package should package co.companyname.spring.tutorial.WHAT_EVER_HERE;
package co.companyname.spring.tutorial; // package for main class
#SpringBootApplication
public class FirstProjectApplication {
public static void main(String[] args) {
SpringApplication.run(FirstProjectApplication.class, args);
}
}
package co.companyname.spring.tutorial.controllers; // package for controllers
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
#RestController
public class HelloController {
#RequestMapping("/hello")
public String hello() {
return "Hello, world";
}}
after finish coding press boot dashboard
one last thing to make sure your controller is mapping or not just console you should see somehting smilliar
Mapped "{[/hello]}" onto public java.lang.String co.companyname.spring.tutorial.controllers.HelloController.hello()
happy coding
Try adding the dependency.
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
This happens when an explicit error page is not defined. To define an error page, create a mapping of /error with a view.
e.g. the below code maps to a string value being returned in case of an error.
package com.rumango.controller;
import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
#Controller
public class IndexController implements ErrorController{
private final static String PATH = "/error";
#Override
#RequestMapping(PATH)
#ResponseBody
public String getErrorPath() {
// TODO Auto-generated method stub
return "No Mapping Found";
}
}
By default spring boot will scan current package for bean definition. So if your current package where main class is defined and controller package is not same or controller package is not child package of your main app package it will not scan the controller. To solve this issue one can include list of packages for bean definition in main package
#SpringBootApplication(scanBasePackages = {"com.module.restapi1.controller"})
or create a hierarchy of package where child package is derived from main package
package com.module.restapi;
package com.module.restapi.controller
In the main class, after the configuration "#SpringBootApplication", adding "#ComponentScan" without having any arguments, worked for me !!!
Main Class :
#SpringBootApplication
#ComponentScan
public class CommentStoreApplication {
public static void main(String[] args) {
SpringApplication.run(CommentStoreApplication.class, args);
}
}
RestController Class :
#RestController
public class CommentStoreApp {
#RequestMapping("/")
public String hello() {
return "Hello World!";
}
}
P.S: Don't miss to run mvn clean and mvn install commands, before launching the application
I am developing Spring Boot application for a few weeks.. And I was gettig same error like below;
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Thu Jan 18 14:12:11 AST 2018
There was an unexpected error (type=Not Found, status=404).
No message available
When I get this error massage I realized my controller or rest controller class is not defined in my project. I mean our all controller packages aren't same package with main class which include #SpringBootApplication annotation.. I mean you need to add you controller package's name to #ComponentScan annotation to your main class which is includes #SpringBootApplication annotation. If you write codes of below your problem will be solving... Most important thing is you have to add your all controller's package to #ComponentScan annotation like I did in the below
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
#SpringBootApplication
#ComponentScan({ "com.controller.package1, com.controller.package2, com.controller.package3, com.controller.packageN", "controller", "service" } // If our Controller class or Service class is not in the same packages we have //to add packages's name like this...directory(package) with main class
public class MainApp {
public static void main(String[] args) {
SpringApplication.run(MainApp.class, args);
}
}
I hope this codes are going to help someone...
If you find another way to solve this error or you have some suggestions for me,
please write to comments... thanks...
I added this dependency and it solved my problem.
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
You might be getting the error i.e.
"This application has no explicit mapping for /error, so you are seeing this as a fallback."
This is because it is not scanning your Controller & Service classes which you have to specify in your main() class like this,
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
#Configuration
#EnableAutoConfiguration
**#ComponentScan({"com.example.demo", "controller", "service"})**
public class SpringBootMvcExample1Application {
public static void main(String[] args) {
SpringApplication.run(SpringBootMvcExample1Application.class, args);
}
}
Note: Here, I have specified various classes like demo, controller and service to be scanned then only it will work properly.
Quite late to the party. As per spring official documentation "Spring Boot installs a whitelabel error page that you see in a browser client if you encounter a server error."
https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#howto-customize-the-whitelabel-error-page
You can disable the feature by setting server.error.whitelabel.enabled=false in application.yml or application.properties file.
2.Recommended way is set your error page so that end user can understand. Under resources/templates folder create a error.html file and add dependency in pom.xml file
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
Spring will automatically choose the error.html page as the default error template.
Note:- Don't forget to update maven project after adding dependency.
You have to organize the packages so that the package containing public static main(or where you wrote #SpringBootApplication), the father of all your other packages.
The problem is that you are navigating to localhost:8080/ instead of localhost:8080/upload as prescribed in the guide. Spring Boot has a default error page used when you navigate to an undefined route to avoid giving away server specific details (which can be viewed as a security risk).
You're options are to either: visit the right page, add your own landing page, or override the white error page.
To simplify this particular situation, I updated the guide so that it uses / instead of /upload.
I too got the same error and was able to resolve the error by adding the below dependency to my pom.xml.
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
Reason is we are using JSP as the view. Default embedded servlet container for Spring Boot Starter Web is tomcat.
To enable support for JSP’s, we would need to add a dependency on tomcat-embed-jasper.
In my case I was returning a JSP as view from controller.
Hope this answer helps someone who are struggling with same issue.
I know it's not exactly answer to question, but this question is first which appears on Google :)
Problem ("This application has no explicit mapping for /error") appears when trying to access Swagger UI.
In my case problems were caused by #RestController("/endpoint"), which isn't handled properly by swagger.
So, this resulted in errors:
#RestController("/endpoint")
public class EndpointController {
And this was fine
#RestController
#RequestMapping("/endpoint")
public class EndpointController {
this can happen if you forget the #RestController annotation on top of your controller class
import import org.springframework.web.bind.annotation.RestController;
and add the annotation as below
refer the simple example below
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RequestMapping;
#RestController
public class HelloController {
#RequestMapping("/")
public String index() {
return "Greetings from Spring Boot!";
}
}
Ensure that you have jasper and jstl in the list of dependencies:
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
Here is a working starter project - https://github.com/spring-projects/spring-boot/tree/master/spring-boot-samples/spring-boot-sample-web-jsp
Author: Biju Kunjummen
I need to mention this way and give the reference to packages and it worked out. You may exclude #EnableAutoConfiguration this annotation but required for me to bypass any DB related depenencies.
#SpringBootApplication
#EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
#ComponentScan(basePackages = {"your package 1", "your package2"})
public class CommentStoreApplication {
public static void main(String[] args) {
SpringApplication.run(CommentStoreApplication.class, args);
}
}
Same problem I have faced recently. I have solved it by just getter and setter method spelling correction!
The tutorial expects you to have the Thymeleaf template engine in classpath. I ran into the same problem and finally figured this out. I'll reach out to the tutorial author to include that info.
The easiest way if you've followed the tutorial is to add the dependency to your pom.xml in the project root folder. Next time you run your app Spring will detect Thymeleaf and use the uploadform template
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
For the full example see their Github repository.
Change #Controller to #RestController in your controller class and everything should go smoothly.
I was facing the same problem, using gradle and it got solved on adding following dependencies-
compile('org.springframework.boot:spring-boot-starter-data-jpa')
compile('org.springframework.boot:spring-boot-starter-web')
testCompile('org.springframework.boot:spring-boot-starter-test')
compile('org.apache.tomcat.embed:tomcat-embed-jasper')
earlier I was missing the last one causing the same error.
I was facing this issue and then later realized that I was missing the #Configuration annotation in the MvcConfig class which basically does the mapping for ViewControllers and setViewNames.
Here is the content of the file :
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
**#Configuration**
public class MvcConfig implements WebMvcConfigurer{
public void addViewControllers(ViewControllerRegistry registry)
{
registry.addViewController("/").setViewName("login");
registry.addViewController("/login").setViewName("login");
registry.addViewController("/dashboard").setViewName("dashboard");
}
}
Hope this helps somebody!!
Make sure #RestController annotation is added right after the #SpringBootApplication.
RestController annotation tells Spring that this code describes an endpoint that should be made available over the web.
You may have not included thymleaf in your pom.xml file.
I had a similar problem. And I had Main.class on the top of all the controllers, yet I was facing this issue. All I needed to do is to create a separate swagger configuration file and initialize docket bean in it.
note: location of this file should be either in the same package of the Main.class file or in a package inside that main package.
SwaggerCongiguration.java file
package com.example.springDataJPAUsingGradle;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
#Configuration
#EnableSwagger2
public class SwaggerConfig {
#Bean
public Docket docket() {
return new Docket(DocumentationType.SWAGGER_2).select().build();
}
}
I also had to add #RequestMapping("/api") in my controller.java.
Here's how:
package com.example.springDataJPAUsingGradle.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.example.springDataJPAUsingGradle.service.StudentService;
#RestController
#RequestMapping("/api")
public class StudentController {
#Autowired(required = true)
#GetMapping("/home")
public String home() {
return "Welcome to home page";
}
}
Then after hitting the url: http://localhost:9090/your-app-root/swagger-ui/ swagger UI will be visible.
For eg, in my case the url is: http://localhost:9090/students/swagger-ui/
All I have done to solve this kind of problem is to mention anotation #Configuration in MVCConfig Class.
Like this one :
package com.example;
/**
* Created by sartika.s.hasibuan on 1/10/2017.
*/
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
#EnableAutoConfiguration
#Configuration
#ComponentScan
public class MvcConfig extends WebMvcConfigurerAdapter {
#Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/home").setViewName("home");
registry.addViewController("/").setViewName("home");
registry.addViewController("/hello").setViewName("hello");
registry.addViewController("/login").setViewName("login");
}
}
I had a similar mistake, I use the spring boot and velocity, my solution is to check the file application.properties, spring.velocity.toolbox-config-location found that this property is wrong