《Spring注解驱动开发》第09章：将Service注入到Servlet中

public void init(ServletConfig servletConfig) throws ServletException {
	ServletContext servletContext = servletConfig.getServletContext();
	WebApplicationContext webApplicationContext = WebApplicationContextUtils
			.getWebApplicationContext(servletContext);
	AutowireCapableBeanFactory autowireCapableBeanFactory = webApplicationContext
			.getAutowireCapableBeanFactory();
	autowireCapableBeanFactory.configureBean(this, BEAN_NAME);
}

package com.telek.pba.base.util;

import java.io.IOException;
import javax.servlet.GenericServlet;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

/**
 * 以下是类似org.springframework.web.struts.DelegatingRequestProcessor的一个委托
 * 用于通过配置的方法，在Servlet中注入Service
 * @author binghe
 * */
public class DelegatingServletProxy extends GenericServlet{
    private static final long serialVersionUID = 1L;
    private String targetBean;
    private Servlet proxy;

   @Override
   public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException{
   		proxy.service(req, res);
   }
     /**
      * 初始化
      */
      public void init() throws ServletException {
          this.targetBean = getServletName();
          getServletBean();
          proxy.init(getServletConfig());
      }

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

package com.telek.pba.launch.servlet;

import java.io.IOException;
import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import com.telek.pba.base.model.PbaUserInfo;
import com.telek.pba.launch.dao.IPbaActivityInfoCurrentDAO;

@Component
public class LaunchActivityQueryServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	 
	//注入IPbaActivityInfoCurrentDAO
	@Resource
	private IPbaActivityInfoCurrentDAO pbaActivityInfoCurrentDAO;

	public LaunchActivityQueryServlet() {
		super();
	}
	 
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}
	 
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//sth to do
	}
	 
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//sth to do
	}
	 
	public void init() throws ServletException {
		// Put your code here
	}
}