How do I deploy the spring boot project into an tomcat container

Publish the ES1en-ES2en project to the tomcat container as usual web project 1

1. Modify the packaging

Set it in pom.xml <packaging>war</packaging>

2. Remove the embedded tomcat plug-in

Find the spring-ES20en-ES21en-ES22en dependency node in ES17en. xml and add the following code.

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
  <!--  Remove embedment tomcat The plug-in  -->
  <exclusions>
    <exclusion>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-tomcat</artifactId>
    </exclusion>
  </exclusions>
</dependency>

3. Add servlet-ES27en dependencies

You can do either of the following. You can choose 1

<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.1.0</version>
  <scope>provided</scope>
</dependency>
<dependency>
  <groupId>org.apache.tomcat</groupId>
  <artifactId>tomcat-servlet-api</artifactId>
  <version>8.0.36</version>
  <scope>provided</scope>
</dependency>

4. Modify the startup class and override the initialization methods

We usually start with the main method, there is a startup class of App, the code is as follows:

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

We need a configuration similar to web.xml to launch the spring context by adding one SpringBootStartApplication class to the sibling of the Application class, as follows:

/**
 *  Modify the startup class, inherit  SpringBootServletInitializer  Pay equal attention to writing  configure  methods 
 */
public class SpringBootStartApplication extends SpringBootServletInitializer {
  @Override
  protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
    //  Notice that it points to the original main Method-Executed Application Start the class 
    return builder.sources(Application.class);
  }
}

5. Package and deploy

In the project root directory (the directory containing pom.xml), type on the command line:

mvn clean package will do, and wait for the completion of packaging. [INFO] BUILD SUCCESS will be packaged successfully.

Then put the war package in target directory into webapps directory of tomcat, start tomcat, and deploy automatically.

Finally, type in the browser

http://localhost:[port number]/[package project name]/

Release success