springboot项目打包war问题

最新推荐文章于 2024-08-22 12:46:10 发布

原创最新推荐文章于 2024-08-22 12:46:10 发布 · 951 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#spring boot #war #tomcat

spring boot 专栏收录该内容

1 篇文章

订阅专栏

本文介绍了如何在较老的Servlet容器（如Servlet 2.5）中部署Spring Boot应用程序。由于这些容器不支持Servlet 3.0 API，因此需要通过引入spring-boot-legacy依赖并配置web.xml来实现。

借用上一篇的切换，其中有一些问题漏掉了。之前也因为这个掉过一个大坑。所以在此记录一下点击打开链接

根据官方文档(http://docs.spring.io/spring-boot/docs/current/reference/html/howto-traditional-deployment.html)说明：

Create a deployable war file for older servlet containers

Older Servlet containers don’t have support for the ServletContextInitializer bootstrap process used in Servlet 3.0. You can still use Spring and Spring Boot in these containers but you are going to need to add a web.xml to your application and configure it to load an ApplicationContext via a DispatcherServlet.

Spring同时提醒我们，如果是比较早的servlet容器（低于Servlet 3.0），可能不支持ServletContextInitializer，这时我们需要给项目配置一个web.xml，并将配置类加载进项目。以下是spring官方给出的方案：

Deploying a WAR in an Old (Servlet 2.5) Container
Spring Boot uses Servlet 3.0 APIs to initialize the ServletContext (register Servlets etc.) so you can’t use the same application out of the box in a Servlet 2.5 container. It is however possible to run a Spring Boot application on an older container with some special tools. If you include org.springframework.boot:spring-boot-legacy as a dependency (maintained separately to the core of Spring Boot and currently available at 1.0.2.RELEASE), all you should need to do is create a web.xml and declare a context listener to create the application context and your filters and servlets. The context listener is a special purpose one for Spring Boot, but the rest of it is normal for a Spring application in Servlet 2.5. Example:

<?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>demo.Application </param-value>
    </context-param>

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

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

    <filter-mapping>
        <filter-name>metricsFilter </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>