sprintboot 整合Servlet,Filter,Listener

Posted 2021-03-05 atomgame

简介：

　　如果需要整合第三方框架时，可能还是不得不使用Servlet，Filter,Listener，Springboot中也有提供支持。

@WebServlet("/my")
public class MyServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp){
        doPost(req,resp);
    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp){
        System.out.println("name>>>"+req.getParameter("name"));
    }
}

@WebFilter("/*")
public class MyFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig){
        System.out.println("MyFilter>>>init");
    }
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        System.out.println("MyFilter>>>doFilter");
        chain.doFilter(request,response);
    }

    @Override
    public void destroy() {
        System.out.println("MyFilter>>>destroy");
    }
}

@WebListener
public class MyListener implements ServletRequestListener {
    @Override
    public void requestDestroyed(ServletRequestEvent sre) {
        System.out.println("MyListener>>>requestDestroyed");
    }
    @Override
    public void requestInitialized(ServletRequestEvent sre) {
        System.out.println("MyListener>>>requestInitialized");
    }
}

三个组件使用@WebServlet,@WebFilter,@WebListener进行标记,启动类上添加@ServletComponentScan，实现对Servlet,Filter,以及Listener。

http://localhost:8080/my?name=tttt