【spring boot】整合LCN，启动spring boot2.0.3 启动报错：Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.

时间：2023-03-08 18:12:06

spring boot 2.0.3启动报错：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

2018-10-24 14:49:06.108 ERROR 14932 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.

    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:155) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]

    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    at com.swapping.springcloud.ms.member.SpringcloudMsMemberApplication.main(SpringcloudMsMemberApplication.java:16) [classes/:na]

Caused by: org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.

    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getWebServerFactory(ServletWebServerApplicationContext.java:204) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:178) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:152) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]

    ... 8 common frames omitted

解决之路：

首先，在启动类上添加注解@EnableAutoConfiguration 或 @SpringBootApplication 这种 解决方案 ，都是无效的

其次，maven编译install这个spring boot服务，打包成功【如果这一步失败，需要查看一下失败原因，然后解决】

【spring boot】整合LCN，启动spring boot2.0.3 启动报错：Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.

【spring boot】整合LCN，启动spring boot2.0.3 启动报错：Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.

最后，仔细观察错误

Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean

猛然发现，本spring boot服务启动是以web服务启动，但是在jar依赖中找了半天没有找到tomcat的相关jar包，所以，我是缺少了这样一个jar包：

<dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

因为这个spring boot是一个子模块module，依赖于父层pom.xml的spring boot2.0.3，所以jar依赖没有写<version>，如果需要你可以自己指定！

最后，服务成功启动！！

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