【天坑】springboot打包成war，部署到tomcat，访问404

这个坑实在太深，坑的我简直不能呼吸

像众位网友所说的那样，我去掉springboot内嵌的tomcat，再依赖servlet-api，修改启动类继承SpringBootServletInitializer，打成war放入tomcat中

但是。。。

访问报404

这可能是条分割线

一、打成war包发布到tomcat（这步已经完成，自行跳过）

1. pom.xml

去掉内嵌tomcat

`
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope><!-- 打成war的时候打开注释，本地开发用内嵌tomcat时加上注释 -->
</dependency>
`

打成war

`
<packaging>war</packaging>
`

2. 启动类

`
@SpringBootApplication
@ComponentScan(basePackages = "com.yzker")
public class Application extends SpringBootServletInitializer {

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}

public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}

}

`

mvn clean pa
4000
ckage 将war包放到tomcat下试试吧，如果报404，参考下面

访问地址：localhost:{tomcat端口号} /重命名的war包名/xxxx

二、404解决办法

原因后续补充

1. pom.xml

`
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-legacy</artifactId>
<version>1.1.0.RELEASE</version>
</dependency>
`

2. 修改web.xml

复制下面的代码，修改com.yzker.test.application.Application为你自己的启动类

`
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>com.yzker.test.application.Application</param-value>
</context-param>

<listener>
<listener-class>org.springframework.boot.legacy.context.web.SpringBootContextLoaderListener</listener-class>
</listener>

<!--
<filter>
<filter-name>metricFilter</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>

<filter-mapping>
<filter-name>metricFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
-->

<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextAttribute</param-name>
<param-value>org.springframework.web.context.WebApplicationContext.ROOT</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

</web-app>
`

3. 到此为止，404的问题解决，如果还有问题，请评论，我们共同解决记录

mvn clean package

将target目录下生成war包放到tomcat里吧

访问地址：localhost:{tomcat端口号} /重命名的war包名/xxxx