在SpringBoot中使用 Servlet Filter Listener

在SpringBoot中使用Servlet

MyServlet.java

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/my/*") // Servlet 3.0 的注解
public class MyServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException{

resp.getWriter().print("my servlet");
}
}

在启动类上添加注解：@ServletComponentScan

@SpringBootApplication
@ServletComponentScan
public class SpringBootWebApplication {

public static void main(String[] args) {
SpringApplication.run(SpringBootWebApplication.class, args);
}
}

在SpringBoot中使用Filter

@WebFilter(“/*”)

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;

@WebFilter("/*") // 比如拦截所有请求
public class LogFilter implements Filter {

@Override
public void init(FilterConfig filterConfig) throws ServletException {

}

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
System.out.println("log filter --->:" + request.getRemoteHost());
chain.doFilter(request, response);
}

@Override
public void destroy() {

}

}

在SpringBoot中使用Listener

@WebListener

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;

/**
* 监听应用的启动或者停止
*
* @author Administrator
*
*/
@WebListener
public class MyContextListener implements ServletContextListener {

@Override
public void contextInitialized(ServletContextEvent sce) {
System.out.println("application startting....");
}

@Override
public void contextDestroyed(ServletContextEvent sce) {
}

}

亦可参考：http://blog.csdn.net/catoop/article/details/50501686