servlet 中的自动装配 [英] Autowiring in servlet

问题描述

我想在 servlet 中使用 spring 自动装配，所以这是我的代码:

i want to use spring autowiring in servlet so here's my code:

@Configurable
public class ImageServlet extends HttpServlet {

   @Autowired
   private SystemPropertyDao systemPropertyDao;

   @Override
   public void init() throws ServletException {


   String imagePath = systemPropertyDao.findByID(StaticParam.CONTENT_FOLDER);

}

而 SystemPropertyDao 用 @Repository

和我的applicationContext.xml:

<context:component-scan base-package="com.basepackage" />
<mvc:annotation-driven />
<context:annotation-config />
<context:spring-configured/>

web.xml:

  <servlet>
    <servlet-name>imageServlet</servlet-name>
    <servlet-class>com.xeno.basepackage.ImageServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>imageServlet</servlet-name>
    <url-pattern>/myimages/*</url-pattern>
  </servlet-mapping>

有时自动装配有效，有时无效(对 spring bean systemPropertyDao 的引用为空)，谁能告诉我我是否遗漏了什么?

sometimes the autowiring works and sometimes it doesn't (the reference to the spring bean systemPropertyDao is null), can anyone please tell me if i am missing something?

推荐答案

我按照以下链接中的解决方案进行操作，效果很好:从 JBoss 中的 servlet 访问 Spring bean

I followed the solution in the following link, and it works fine: Access Spring beans from a servlet in JBoss

public class MyServlet extends HttpServlet {

  @Autowired
  private MyService myService;

  public void init(ServletConfig config) {
    super.init(config);
    SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this,
      config.getServletContext());
  }
}

这篇关于servlet 中的自动装配的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！