spring 管理servlet

来源：互联网发布：java程序员面试指南编辑：程序博客网时间：2024/06/01 22:15

用spring管理servlet，如果servlet注入了service，service为null，查找资料，网上有通过代理servlet的方式来解决，参考http://justsee.iteye.com/blog/1211814；

其实spring提供了管理servlet的方式，参考：http://hanqunfeng.iteye.com/blog/605174；

利用第二种方式，我成功调用了servlet，以下是步骤：

第一步：web.xml:

    <listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>  <context-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/classes/spring/application*.xml</param-value></context-param><!-- springMVC控制器--><servlet><servlet-name>spring</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param>        <param-name>contextConfigLocation</param-name>        <param-value>/WEB-INF/classes/spring/application*.xml</param-value>    </init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>spring</servlet-name><url-pattern>*.po</url-pattern></servlet-mapping>

第二步：applicationContext.xml 加上

<!-- servlet适配器，这里必须明确声明，因为spring默认没有初始化该适配器 --><bean id="servletHandlerAdapter" class="org.springframework.web.servlet.handler.SimpleServletHandlerAdapter"/> <bean id="beanMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">            <property name="mappings">             <value>                /test.po=testServlet             </value>           </property>         </bean>

第三步：实现servlet

package com.cheangis.servlet;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import com.cheangis.service.impl.TestService;@SuppressWarnings("serial") @Controllerpublic class TestServlet extends HttpServlet {@Autowiredprivate TestService testService;@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {System.out.println("参数:"+req.getParameter("name"));resp.getWriter().write(testService.getFullName(req.getParameter("name")));resp.getWriter().flush();}  @Override      protected void doPost(HttpServletRequest request, HttpServletResponse response)              throws ServletException, IOException {          doGet(request, response);      }  }

第四步：service：

package com.cheangis.service.impl;import org.springframework.stereotype.Service;@Servicepublic class TestService {   public String getFullName(String name) {   return "my name is "+name;   }}

第五步:测试

浏览器地址栏输入：
http://localhost:8080/test/test.po?name=22

打印出 my name is 22

表示ok了