servlet 使用spring管理bean

servlet 使用spring管理bean

要serlvet使用注解的形式去注入bean，那么如何才能将spring管理的bean注入到servlet中。原本spring管理的bean和servlet不在一个上下文环境中是无法相互注入的。

解决办法创建一个AbstractServlet 抽象类，让你的所有servlet继承于此类

 importjava.io.IOException;

 importjavax.servlet.ServletConfig;
 importjavax.servlet.ServletException;
 importjavax.servlet.http.HttpServlet;
 importjavax.servlet.http.HttpServletRequest;
 importjavax.servlet.http.HttpServletResponse;

 importorg.springframework.web.context.support.SpringBeanAutowiringSupport;

 /**
 *ServletimplementationclassAbstractServlet
 */

 publicclassAbstractServletextendsHttpServlet{
 privatestaticfinallongserialVersionUID=1L;

 /**
 *@seeHttpServlet#HttpServlet()
 */
 publicAbstractServlet(){
 super();
 //TODOAuto-generatedconstructorstub
 }

 publicvoidinit(ServletConfigconfig)throwsServletException{
 SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this,
 config.getServletContext());
 }

 /**
 *@seeHttpServlet#doGet(HttpServletRequestrequest,HttpServletResponse
 *response)
 */
 protectedvoiddoGet(HttpServletRequestrequest,
 HttpServletResponseresponse)throwsServletException,IOException{
 }

 /**
 *@seeHttpServlet#doPost(HttpServletRequestrequest,HttpServletResponse
 *response)
 */
 protectedvoiddoPost(HttpServletRequestrequest,
 HttpServletResponseresponse)throwsServletException,IOException{
 doGet(request,response);
 }

 }

关键在于SpringBeanAutowiringSupport.processBInjectionasedOnServletContext(this,

 config.getServletContext());

 通过使用spring提供的支持可以将当前的servlet上下文环境添加到spring管理的上下文环境中。

 当然还有其他一些方法就不在这赘述了。