如何用Spring将Service注入到Servlet中

标签：servlet   spring   注入   service   

解决方法有两种（推荐使用第二种）

方法一：
 
直接重写Servlet的Init()方法，代码如下：

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 liyinwei
 * 
 */
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);
	}
 
}

<servlet>
  <description>活动发起模块活动查询分页Servlet</description>
  <display-name>launchActivityQueryServlet</display>
  <servlet-name>LaunchActivityQueryServlet</servlet-name>
  <servlet-class>com.telek.pba.launch.servlet.LaunchActivityQueryServlet</servlet-class>
<servlet>
 
<servlet-mapping>
  <servlet-name>LaunchActivityQueryServlet</servlet-name>
  <url-pattern>/servlet/launch/LaunchActivityQueryServlet</url-pattern>
</servlet-mapping>
</servlet>

<servlet>
  <description>活动发起模块活动查询分页Servlet</description>
  <display-name>launchActivityQueryServlet</display>
  <servlet-name>launchActivityQueryServlet</servlet-name>
  <servlet-class>com.telek.pba.base.util.DelegatingServletProxy</servlet-class>
<servlet>
 
<servlet-mapping>
  <servlet-name>launchActivityQueryServlet</servlet-name>
  <url-pattern>/servlet/launch/LaunchActivityQueryServlet</url-pattern>
</servlet-mapping>
</servlet> 

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;
 
 
	/**
	 * Constructor of the object.
	 */
	public LaunchActivityQueryServlet() {
		super();
	}
 
	/**
	 * Destruction of the servlet. <br />
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}
 
	/**
	 * The doGet method of the servlet. <br />
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//sth to do
	}
 
	/**
	 * The doPost method of the servlet. <br />
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//sth to do
	}
 
	/**
	 * Initialization of the servlet. <br />
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}
 
}

<context:component -scan base-package="com.telek.pba.*.dao.impl,
 					com.telek.pba.*.service.impl,
 					com.telek.pba.*.servlet"></context:component>

如何用Spring将Service注入到Servlet中

标签：servlet   spring   注入   service   

原文地址：http://blog.csdn.net/l1028386804/article/details/45696707