使用spring的autowried在servlet中注入bean

前提：已经配送好spring，在struts中用@Autowired可以正常注入。新建servlet，使用@Autowired发现不能注入bean的情况下，使用以下方法：
一、写个基础servlet，此servlet用于代理查找相应的servlet

public class DelegatingServletProxy extends GenericServlet{

	private static final long serialVersionUID = -4708556750740588204L;
	private String targetBean;
    private Servlet proxy;
    
	@Override
	public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
		proxy.service(req, res);
	}

	@Override
    public void init() throws ServletException {
        this.targetBean = getServletName();
        getServletBean();
        proxy.init(getServletConfig());
    }

    private void getServletBean() {
        WebApplicationContext wac = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
        this.proxy = (Servlet) wac.getBean(targetBean);
    }
	
}

二、
1、在具体的servlet中加入@Component("")
2、用@Autowired注入具体的service层bean类，如下创建了A和B servlet。

@Component("A")
public class A extends HttpServlet {

@Autowired
private ArticletypeService articletypeService;
.............
}

@Component("B")
public class A extends HttpServlet {

@Autowired
private ArticletypeService articletypeService;
.............
}

3、修改web.xml
  把A、BSservlet的servlet-class类路径改成代理servlet，既DelegatingServletProxy的路径。

<!-- 代理servlet不需要
  <servlet>
    <servlet-name>DelegatingServletProxy</servlet-name>
    <servlet-class>com.web.DelegatingServletProxy</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>DelegatingServletProxy</servlet-name>
    <url-pattern>/servlet/DelegatingServletProxy</url-pattern>
  </servlet-mapping>
   -->
  <servlet>
    <servlet-name>A</servlet-name>
    <servlet-class>com.web.DelegatingServletProxy</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>B</servlet-name>
    <servlet-class>com.web.DelegatingServletProxy</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>A</servlet-name>
    <url-pattern>/servlet/A</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>B</servlet-name>
    <url-pattern>/servlet/B</url-pattern>
  </servlet-mapping>

4、在servlet中bean注入成功



以上内容不实用代理和@Autowired写法为：

public class MetaInitServlet extends HttpServlet {

private SysParametersService sysParametersService;

public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

.............
.............

}

public void init() throws ServletException {
		WebApplicationContext context = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
		sysParametersService = (SysParametersService) context.getBean("SysParametersService");
	}

}