SpringBoot中如何打war包？

之前的项目都是直接打成jar包的，那么如何使用SpringBoot把项目打成war包呢？分为以下三步：

1. pom.xml文件中的packing标签改为war
2. build标签下添加以下依赖

<build>
    <!--打出的war包的名字-->
    <finalName>${
    
    project.artifactId}</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-war-plugin</artifactId>
          <configuration>
            <failOnMissingWebXml>false</failOnMissingWebXml>
          </configuration>
        </plugin>
    </pluginManagement>
  </build>

3. SpringBoot的启动类继承SpringBootServletInitializer类，并且重写方法configure

@SpringBootApplication
public class MainApplication extends SpringBootServletInitializer {
    
    
    public static void main(String[] args) throws Exception{
    
    
        SpringApplication.run(MainApplication.class,args);
    }

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
    
    
        return builder.sources(MainApplication.class);
    }
}