Springboot 应用程序适用于嵌入的 tomcat 但在外部 tomcat 中得到 404

Question

I have a project on spring and when i run it on the embbeded tomcat it works so good But the idea is put the project in a external server but when i create the war and i deploy it in tomcat 8 i get 404 even if it is running

I have seen that the problem could be in the maven but i tried a lot of things that i saw in other posts and i cant fix it

i dont knot what else i can do.

here is some of my code

@SpringBootApplication
public class RD extends SpringBootServletInitializer implements CommandLineRunner {
        @Resource
     // FileStorageService storageService;
        
        FileStorageService storageService;
    public static void main(String[] args) {
        SpringApplication.run(RD.class, args);
    }
      @Override
      protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
          return builder.sources(RD.class);
      }
      @Override
      public void run(String... arg) throws Exception {
        storageService.deleteAll();
        storageService.init();
      }

}

my main class already has the serverlet extends i think that its not the problem

<?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>2.5.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.r</groupId>
    <artifactId>RD</artifactId>
    <version>1.0</version>
    <packaging>war</packaging>
    <name>RDrone</name>
    <description>Portal Web</description>
    <properties>
        <java.version>1.8</java.version>
        
    </properties>
    <dependencies>
        <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>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</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-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
                <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <optional>true</optional>
</dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery-validation</artifactId>
            <version>1.19.0</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>font-awesome</artifactId>
            <version>5.13.0</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>4.5.0</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>popper.js</artifactId>
            <version>2.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>webjars-locator</artifactId>
            <version>0.40</version>
        </dependency>
        <dependency>
    <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
    <version>1.4</version>
  </dependency>
  <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
  
    </dependencies>

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

</project>

And here is my pom where i think that could be the problem

I tried to make some exlusion on the springgboot starter web dependecy but it doesnt work

Thats what i see that fix it in other project but not in mine

I dont know if could be something on my tomcat but i have tomcat 8 with java 1.8

Answer 1

I suppose that you currently have a web application which is deployed as a spring boot jar application with an embedded server and you want to transform it into a war deployable web application on some already existing tomcat server so that you can have multiple wars (web applications) on some existing tomcat server.

In this case you must remove the spring-boot dependencies on maven and introduce only spring dependencies (ex spring-web-mvc )

Then you will have to rewrite some parts of the application so that they conform with those new dependencies. Your main method for example will be removed.

You will need some other configurations as well, as each war file will have it's own application context path, which will distinguish which url's are directed to each web application.

Answer 2

I deployee spring boot restful app on wildfly what I do is create the class ServletInitializer .

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

public class ServletInitializer extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(FikerApplication.class);
    }

}

I hope this will give you the solution, if not comment me I will try to figure out.