将 Spring @Resource 注入 Servlet [英] Injecting Spring @Resource into a Servlet

问题描述

我有以下一段代码，我以这个答案为模型:

I have the following piece of code, which I modeled on this answer:

public class DeployerServlet extends HttpServlet {
    @Resource
    Engine engine;

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

    // ...
}

但是 servlet 甚至没有正确实例化.在创建实例时，Tomcat 尝试在 JNDI 中查找名称 com.example.DeployerServlet/engine 这导致异常，

But the servlet is not even correctly instantiated. When creating an instance, Tomcat tries to look up the name com.example.DeployerServlet/engine in JNDI which results in an exception,

SEVERE: Allocate exception for servlet Deploy Servlet
javax.naming.NameNotFoundException: Name com.example.DeployerServlet is not bound in this Context

那么，将 Spring bean 注入 servlet 的推荐方法是什么?

So, what is the recommended way to inject a Spring bean into a servlet?

推荐答案

@Resource 注释是一个 JavaEE 元素.它用于声明对资源的引用.尽管 Spring 可以像使用 @Inject 和 @Autowired 一样使用它，但在这种情况下，servlet 容器首先起作用.只需将您的 @Resource 替换为 @Autowired.

The @Resource annotation is a JavaEE element. It's used to declare a reference to a resource. Although Spring can use it the same way it does with @Inject and @Autowired, in this case the servlet Container acts first. Just replace your @Resource with @Autowired.

这篇关于将 Spring @Resource 注入 Servlet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！