springboot打成war包部署到外部tomcat

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1、<packaging>jar</packaging> 改为 <packaging>war</packaging>

2、在maven里排除自带tomcat插件，有两种方法

	1)、<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

	2)、<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>

3、启动类Application.java继承SpringBootServletInitializer并重写configure方法

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

		protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
			// 注意这里要指向原先用main方法执行的Application启动类
			return builder.sources(BootdoApplication.class);
		}
	}
	
4、打包项目：【mvn clean package】

5、将打包好的war包丢到tomcat的webapps目录下，到bin目录下启动tomcat

6、注意：spring boot只支持tomcat 8.5 以上版本，如果外部tomcat版本过低，需要在pom.xml里指定低版本的tomcat
	<properties>
		<tomcat.version>7.0.47</tomcat.version>
	</properties>

7、请求方式：【localhost:port/war包名/在SpringBoot中RequestMapping设置的url请求】