Problem with SpringBoot in Eclipse

[martin codey]

Error:The import org.springframework.boot.test cannot be
resolved
Error:SpringBootTest cannot be resolved to a
type.

package com.hellokoding.tutorials;

import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class WebApplicationTests {

	@Test
	void contextLoads() {
	}

}

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.hellokoding.springboot</groupId>
    <artifactId>springboot-registration-login</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.3.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        
        

        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
<!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api -->
<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter-api</artifactId>
    <version>5.6.0</version>
    <scope>test</scope>
</dependency>

    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

[martin codey]

Also sorry put it in  wrong  forum, could someone change it to the right one

[Miroslav Lehotsky]

I don't see you have declared dependency for 'spring-boot-starter-test' artifact.

[martin codey]

Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.2.4.RELEASE:repackage (repackage) on project springboot-registration-login: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.2.4.RELEASE:repackage failed: Unable to find a single main class from the following candidates [com.hellokoding.auth.WebApplication, com.hellokoding.auth.web.WebApplication] -> [Help 1]

I fixed it now. Got a new error but only when using maven clean install. I think it could be that a lot of my imports are not use like for example: Multiple markers at this line
- The import org.springframework.boot.web.servlet.support.SpringBootServletInitializer is never
used
- The import org.springframework.boot.builder.SpringApplicationBuilder is never used

[Miroslav Lehotsky]

Did you fix this error ?

Error:The import org.springframework.boot.test cannot be resolved

and now you are encountering this one

Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.2.4.RELEASE:repackage (repackage) on project springboot-registration-login: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.2.4.RELEASE:repackage failed: Unable to find a single main class from the following candidates [com.hellokoding.auth.WebApplication, com.hellokoding.auth.web.WebApplication] -> [Help 1]

?

The unused imports you are mentioning are just compiler warnings, not errors, and they should not cause maven compilation to fail (unless you are instructing maven to handle warnings as errors, which you are not, as far as I can see).

[martin codey]

Yes I fixed it with this code:

<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter-api</artifactId>
    <version>5.6.0</version>
    <scope>test</scope>
</dependency>

[Miroslav Lehotsky]

Okay, from that new error, it seems like you have in your project two separate main() methods (in classes com.hellokoding.auth.WebApplication, com.hellokoding.auth.web.WebApplication) and maven just can't decide without you telling him which one he should use. You should provide configuration tag specifying class with main() method to use, eg:

<mainClass>com.hellokoding.auth.WebApplication</mainClass>

[Miroslav Lehotsky]

Maybe try this part for spring-boot-maven-plugin...

<build>
   <plugins>
      <plugin>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-maven-plugin</artifactId>
         <executions>
            <execution>
               <goals>
                  <goal>repackage</goal>
               </goals>
               <configuration>
                  <mainClass>com.hellokoding.auth.WebApplication</mainClass>
               </configuration>
            </execution>
         </executions>
      </plugin>
   </plugins>
</build>

[martin codey]

Thank you very much for the help

[Miroslav Lehotsky]

No problem Is the issue completely resolved, then ?

[martin codey]

Yes no error when I use maven clean install. Gonna figure out how to run it on the server now, thanks

[martin codey]

Why does it show me no errors when compiling it and when I run the app it shows me:
Field userService in com.hellokoding.auth.web.UserController required a bean of type 'com.hellokoding.auth.service.UserService' that could not be found.

The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'com.hellokoding.auth.service.UserService' in your configuration.

[Miroslav Lehotsky]

You need to tell Spring to create a bean of a class. You can tell him that by annotating UserService with '@Service' annotation.

[martin codey]

Like this? Still got the same error message

package com.hellokoding.auth.service;

import org.springframework.stereotype.Service;

import com.hellokoding.auth.model.User;

@Service
public interface UserService {
    void save(User user);

    User findByUsername(String username);
}

[Miroslav Lehotsky]

Yes, like that, although, you need to annotate implementation class, not interface.

[martin codey]

Still the same error

package com.hellokoding.auth.service;

import com.hellokoding.auth.model.User;
import com.hellokoding.auth.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

import com.hellokoding.auth.repository.RoleRepository;
import com.hellokoding.auth.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;

import java.util.HashSet;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserRepository userRepository;
    @Autowired
    private RoleRepository roleRepository;
    @Autowired
    private BCryptPasswordEncoder bCryptPasswordEncoder;

    @Override
    public void save(User user) {
        user.setPassword(bCryptPasswordEncoder.encode(user.getPassword()));
        user.setRoles(new HashSet<>(roleRepository.findAll()));
        userRepository.save(user);
    }

    @Override
    public User findByUsername(String username) {
        return userRepository.findByUsername(username);
    }
}

[Miroslav Lehotsky]

Still error in Controller not finding UserService bean ? Do you have '@SpringBootApplication' class annotation at a class containing main() method you're running ? Where is this class located ? I mean package.

[martin codey]

package com.hellokoding.auth.web;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

@SpringBootApplication
public class WebApplication {
    public static void main(String[] args) throws Exception {
        SpringApplication.run(WebApplication.class, args);
    }
}

It is located in hellokoding.auth.web I removed hellokoding.auth.web because it hade a file that was a duplicate of webapplication.

[Miroslav Lehotsky]

Well, by default, Spring looks for bean defining classes in all subpackages of package, where you have '@SpringBootApplication'. Usually such class is placed to the root package, so you can move the 'WebApplication' class one folder up (to package 'com.hellokoding.auth'), that way package 'com.hellokoding.auth.service' containing UserService class will be a subpackage and therefore will be scanned by Spring, or you can define packages to scan by Spring using annotation '@ComponentScan(“com.hellokoding.auth.service”)'. Place this annotation on top/under '@SpringBootApplication' annotation.

[martin codey]

Now it caused this error in my pom:
/Users/marcou/another-spring-boot/target/classes/META-INF/MANIFEST.MF (No such file or
directory)

[Miroslav Lehotsky]

martin codey wrote:Now it caused this error in my pom:
/Users/marcou/another-spring-boot/target/classes/META-INF/MANIFEST.MF (No such file or
directory)

Did you try to rebuild/recompile the project ?

[martin codey]

It is fixed but when i started the application and put localhost... in the browser I got this:

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Thu Mar 19 17:27:13 CET 2020
There was an unexpected error (type=Not Found, status=404).
/login.jsp

[Miroslav Lehotsky]

Was the rebuild/recompilation itself sufficient to resolve that issue or did you do something additional to resolve previous issue ?

If you don't have mapping for specific url you are trying to load, its normal. Also, just to be sure, spring boot fires up the application by default on port 8080, be sure to include that in the URL.

[martin codey]

I did not do anything additional just as you said.

I know but in the browser when typing localhost:8080 it doesnt show login page as it show on this tutorial:
Tutorial

[Miroslav Lehotsky]

Can you provide your UserController class here ?

[martin codey]

package com.hellokoding.auth;

import com.hellokoding.auth.model.User;
import com.hellokoding.auth.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

import com.hellokoding.auth.service.SecurityService;
import com.hellokoding.auth.service.UserService;
import com.hellokoding.auth.validator.UserValidator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;

@Controller
public class UserController {
    @Autowired
    private UserService userService;

    @Autowired
    private SecurityService securityService;

    @Autowired
    private UserValidator userValidator;

    @GetMapping("/registration")
    public String registration(Model model) {
        model.addAttribute("userForm", new User());

        return "registration";
    }

    @PostMapping("/registration")
    public String registration(@ModelAttribute("userForm") User userForm, BindingResult bindingResult) {
        userValidator.validate(userForm, bindingResult);

        if (bindingResult.hasErrors()) {
            return "registration";
        }

        userService.save(userForm);

        securityService.autoLogin(userForm.getUsername(), userForm.getPasswordConfirm());

        return "redirect:/welcome";
    }

    @GetMapping("/login")
    public String login(Model model, String error, String logout) {
        if (error != null)
            model.addAttribute("error", "Your username and password is invalid.");

        if (logout != null)
            model.addAttribute("message", "You have been logged out successfully.");

        return "login";
    }

    @GetMapping({"/", "/welcome"})
    public String welcome(Model model) {
        return "welcome";
    }
}

[Miroslav Lehotsky]

Do you have respective .jps pages (welcome.jsp, ...) in right locations ? If so, then check if you have proper authorization access set in 'WebSecurityConfig' class.

[martin codey]

I am not sure. They look like this.

[Miroslav Lehotsky]

Seems to be fine. I suspect that you may have wrong security configuration in 'WebSecurityConfig' class. You can post the code again here, but since you're following tutorial with full source code available, did you check your code against the code from tutorial ? If you just didn't forget to include some code ?

[martin codey]

Pasted it in now and still the same.

package com.hellokoding.auth;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    @Qualifier("userDetailsServiceImpl")
    @Autowired
    private UserDetailsService userDetailsService;

    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
                .antMatchers("/resources/**", "/registration").permitAll()
                .anyRequest().authenticated()
                .and()
            .formLogin()
                .loginPage("/login")
                .permitAll()
                .and()
            .logout()
                .permitAll();
    }

    @Bean
    public AuthenticationManager customAuthenticationManager() throws Exception {
        return authenticationManager();
    }

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder());
    }
}

[Miroslav Lehotsky]

Can you verify that your application server is up and running ? That you did not get any runtime exception when starting the application ?

[martin codey]

Used terminal and typed cd ~/another-spring-boot and then i typed mvn clean spring-boot:run and it said the application was running.
Then in browser(chrome) i typed http://localhost:8080

[Miroslav Lehotsky]

It's hard to chase the real problem like this as we only have partial info about the state of your project. I tried to clone tutorial repository and tried to run the project you're trying to run, with docker-compose as proposed in tutorial, and here's my result when hitting 'http://localhost:8080/':

[Miroslav Lehotsky]

As you're trying to run it with maven, are you running MySQL server ?

[martin codey]

I think it is my compose.yml. Yes I am running mysql

[martin codey]

Got this build failure when running docker-compose up:
[INFO] ------------------------------------------------------------------------
registration-login_1  | [INFO] BUILD FAILURE
registration-login_1  | [INFO] ------------------------------------------------------------------------
registration-login_1  | [INFO] Total time: 42.754 s
registration-login_1  | [INFO] Finished at: 2020-03-21T21:39:26Z
registration-login_1  | [INFO] ------------------------------------------------------------------------
registration-login_1  | [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.2.4.RELEASE:run (default-cli) on project springboot-registration-login: Application finished with exit code: 1 -> [Help 1]
registration-login_1  | [ERROR]
registration-login_1  | [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
registration-login_1  | [ERROR] Re-run Maven using the -X switch to enable full debug logging.
registration-login_1  | [ERROR]
registration-login_1  | [ERROR] For more information about the errors and possible solutions, please read the following articles:
registration-login_1  | [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
another-spring-boot_registration-login_1 exited with code 1

[martin codey]

Thanks for all of your help and time. It solved now.

[Miroslav Lehotsky]

Glad to see you managed to work it out. Care to share what was the problem ?

[martin codey]

I cloned it and compared and the difference was that in the first project I hade a different version of the jar in the referenced library and different version in maven dependecies and pointing different in the pom file.