Whitelabel Error Page 404 appears in each endpoints. Spring Boot

February 27, 2023

When I create any contoller and add mapping for it, 404 page appears in any mapping I have created.Annotation Component scan does not work. All works in my old projects. I was trying move my app class to controller package. It could not help. And I was trying add component scan annotation. Unfortunately, it could not help as well

This is my Application class

package by.yankavets.jetbank;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class JetBankApplication {

    public static void main(String[] args) {
        SpringApplication.run(JetBankApplication.class, args);
    }

}

This is my only controller class

package by.yankavets.jetbank.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class CardController {

    @GetMapping("/card")
    public String card() {
        return "This is new card";
    }
}

Pom.xml

<?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>3.0.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>by.yankavets</groupId>
    <artifactId>JetBank</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>JetBank</name>
    <description>JetBank</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

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

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

</project>

application.properties

spring.security.user.password=1111

Project structure

>Solution :

Check you path to application. If it contains any spaces, you should remove them or move your app to another folder without spaces in path and re-run it.

Good: /home/user/dev/spring-app

Bad: /home/user/my dev/spring app

On screenshot you provided, I noticed folder name with space Spring Framework

Hope it will helps you 🙂