springboot打包war，tomcat运行及常见问题

一、修改打包形式为war

在pom.xml里设置

<packaging>war</packaging>

二、过滤springboot默认嵌入式tomcat插件

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- 过滤springboot默认嵌入式tomcat插件 -->
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>

三、加入servlet-api的依赖

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>

四、更改生成war包名

pom.xml - build 加入finalName。避免生成war包名歧义

<build>
<finalName>spring-boot</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

四、继承springboot启动类并重写configure方法

1）创建java类SpringBootStartApplication

2）继承SpringBootServletInitializer 并重写configure

public class SpringBootStartApplication extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
// 此处Application.class替换为springboot默认启动类
return builder.sources(Application.class);
}
}

五、打包

mvn clean package

注意：

系统环境系统变量jdk版本与打包项目的jdk版本一致，否则会出现tomcat启动成功，首页正常访问而各个路径均404