Mobile development Spring Boot External tomcat tutorial and solutions

springboot microservice has tomcat built in and is executed in the project directory :mvn clean package. You can call the project jar and start the project with java-ES8en jar package name.jar.

What scenarios do you need to package springboot as war for deployment?

1.1 tomcat managed multiple projects

2.springboot integrated jsp, etc

Solutions:

1. < packaging > jar < /packaging > Change jar to war

2. Introduce dependencies:

 <dependency>
    <groupid>org.springframework.boot</groupid>
    spring-boot-starter-web</artifactid>
    <exclusions>
      <exclusion>
        <groupid>org.springframework.boot</groupid>
        spring-boot-starter-tomcat</artifactid>
      </exclusion>
    </exclusions>
    </dependency>
    <!--servlet Rely on -->
  <dependency>
    <groupid>javax.servlet</groupid>
    javax.servlet-api</artifactid>
    <version>3.1.0</version>
    <scope>provided</scope>
  </dependency>
  <dependency>
    <groupid>org.apache.tomcat</groupid>
    tomcat-servlet-api</artifactid>
    <version>8.0.36</version>
    <scope>provided</scope>
  </dependency>

3. Start class to inherit SpringBootServletInitializer, and override configure method:

    @SpringBootApplication 
    public class DemoApplication extends SpringBootServletInitializer { 
    public static void main(String[] args) {
  SpringApplication.run(DemoApplication.class, args);
}
    @Override
    protected SpringApplicationBuilder configure
      (SpringApplicationBuilder builder) {
  return builder.sources(DemoApplication.class);
}
</code></code>
}

4. Modify the tomcat configuration file context.xml

Modify the label:

<context>  to <context xmlblockexternal="false"> , you can package and deploy 
</context></context>

conclusion