springboot uses external tomcat startup mode

Directory Startup Using External tomcat Startup Considerations Using External tomcat

Boot with external tomcat

Open the pom file and set the packaging format to war

<packaging>war</packaging>

SpringBoot has built-in tomcat running module by default, which can be started directly by main in Application (inherited from SpringBootServletInitializer).

The following configuration works in an external tomcat container

<dependency>  
       <groupId>org.springframework.boot</groupId>  
       <artifactId>spring-boot-starter-web</artifactId>  
       <!--  If you are using your own tomcat Please comment below, if you use the 3 Square tomcat Don't comment below  -->  
        <exclusions>    
               <exclusion>    
                   <groupId>org.springframework.boot</groupId>    
                   <artifactId>spring-boot-starter-tomcat</artifactId>    
               </exclusion>    
           </exclusions>   
   </dependency> 

Custom package name

<plugin>  
            <groupId>org.apache.maven.plugins</groupId>  
            <artifactId>maven-war-plugin</artifactId>  
            <configuration>  
                <warName>springboot</warName>  
            </configuration>  
  </plugin> 

Use External tomcat Startup Considerations

springboot boots with an external tomcat

The default startup class inherits the SpringBootServletInitiailzer class and overrides the configure () method.

@SpringBootApplication
public class OpenApiApplicationextends SpringBootServletInitializer {
    public static void main(String[] args) {
        SpringApplication.run(OpenApiApplication.class, args);
    }
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(OpenApiApplication.class);
    }
 }