Spring Boot如何将一个WAR文件部署到Tomcat呢?

下文笔者讲述将SpringBoot中的WAR包文件部署到Tomcat容器中的方法分享,如下所示

SpringBoot部署WAR包到Tomcat容器的步骤

实现步骤:
   1.扩展SpringBootServletInitializer
   2.将嵌入式servlet容器标记为已提供。
   3.修改pom.xml为war包模式

扩展SpringBootServletInitializer

普通SpringBoot配置代码StartWebApplication.java

import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
public class StartWebApplication {
 
    public static void main(String[] args) throws Exception {
        SpringApplication.run(StartWebApplication.class, args);
    }
 
}

用于WAR部署

StartWebApplication.java

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
 
@SpringBootApplication
public class StartWebApplication extends SpringBootServletInitializer {
 
    public static void main(String[] args) {
        SpringApplication.run(StartWebApplication.class, args);
    }
 
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(StartWebApplication.class);
    }
}
 
 
/*@SpringBootApplication
public class StartWebApplication {
    public static void main(String[] args) throws Exception {
        SpringApplication.run(StartWebApplication.class, args);
    }
}*/

由于存在多个主类
需设置Spring Boot启动的主类
pom.xml

<properties>
      <!-- The main class to start by executing java -jar -->
      <start-class>com.java265.SpringBootWebApplication</start-class>
  </properties>

嵌入式servlet容器标记为已提供

pom.xml

<dependencies>
 
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-thymeleaf</artifactId>
	</dependency>
 
	<!-- marked the embedded servlet container as provided -->
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-tomcat</artifactId>
		<scope>provided</scope>
	</dependency>
 
</dependencies>

pom.xml

<packaging>war</packaging>
完成，构建项目并复制WAR文件以进行部署

采用以上步骤后
  可以将打包生成的war包
  放入到tomcat中直接部署运行