使用spring sservlet使用spring管理bean有什么好处

sservlet使用spring管理bean有什么好处

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

Java代码

import java.io.IOException

import javax.servlet.ServletConfig
import javax.servlet.ServletException
import javax.servlet.http.HttpServlet
import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse

import org.springframework.web.context.support.SpringBeanAutowiringSupport

/**
* Servlet implementation class AbstractServlet
*/

public class AbstractServlet extends HttpServlet {
private static final long serialVersionUID = 1L

/**
* @see HttpServlet#HttpServlet()
*/
public AbstractServlet() {
super()
// TODO Auto-generated constructor stub
}

public void init(ServletConfig config) throws ServletException {
SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this,
config.getServletContext())
}

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
}

/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doGet(request, response)
}

}

关键在于SpringBeanAutowiringSupport.processBInjectionasedOnServletContext(this,

Java代码
config.getServletContext())

Java代码
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。

Java代码
当然还有其他一些方法就不在这赘述了。