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。