SpringBoot项目打包部署外部JavaEE容器

前言

springBoot项目开发过程中使用的是内嵌的tomcat，jetty容器，当项目需要发布的时候怎么呢？

只需要两步

步骤

修改启动类，继承 SpringBootServletInitializer 并重写 configure 方法

/**
* Author: 遇见小星
* Email: tengxing7452@163.com
* Date: 17-5-10
* Time: 上午10:40
* Describe: 程序入口
*/
@SpringBootApplication
@EnableAutoConfiguration
public class Mainspringboot extends SpringBootServletInitializer {

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

修改pom.xml文件

<!-- <packaging>jar</packaging> -->
<packaging>war</packaging>

tomcat插件依赖包添加生命周期privided

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

<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>

结束语

SpringBootServletInitializer类implements WebApplicationInitializer接口，而WebApplicationInitializer里有void onStartup(ServletContext var1) 方法

void onStartup(ServletContext var1) throws ServletException;

SpringBootServletInitializer 实现了这个onStartup方法，主要在启动容器时负责加载相关配置

public void onStartup(ServletContext servletContext) throws ServletException {
this.logger = LogFactory.getLog(this.getClass());
final WebApplicationContext rootAppContext = this.createRootApplicationContext(servletContext);
if(rootAppContext != null) {
servletContext.addListener(new ContextLoaderListener(rootAppContext) {
public void contextInitialized(ServletContextEvent event) {
}
});
} else {
this.logger.debug("No ContextLoaderListener registered, as createRootApplicationContext() did not return an application context");
}

}

代码

servletContext.addListener(new ContextLoaderListener(rootAppContext) {
public void contextInitialized(ServletContextEvent event) {
}
});

中ContextLoaderListener实现了ServletContextListener接口，这样就可以通过addListener()的方式将springboot项目下的相关配置进行加载。