将spring管理的bean使用注解的方式注入到servlet中

Filter和Servlet中不能直接注解使用spring的bean，因为这两个都是servlet容器维护管理的，当然也有实现方法，如下：

1。创建一个AbstractServlet 抽象类，让你的所有servlet继承于此类：

import java.io.IOException;

import javax.servlet.ServletConfig;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.context.support.SpringBeanAutowiringSupport;

/**

* Servlet implementation class AbstractServlet

*/

public class AbstractServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

/**

* @see HttpServlet#HttpServlet()

*/

public AbstractServlet() {

super();

// TODO Auto-generated constructor stub

}

public void init(ServletConfig config) throws ServletException {

// 在 servlet的 init method中，，寫下面的程式，讓 spring 去 ApplicationContext 做 lookup，

SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this,

config.getServletContext());

}

/**

* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse

* response)

*/

protected void doGet(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

}

/**

* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse

* response)

*/

protected void doPost(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

doGet(request, response);

}

}

然后需要有注解spring管理的bean的servlet或fiter时候继承此类，重写方法