【Spring Boot 2.0学习之旅-06-2】深入过滤器Filter和使用Servlet3.0配置自定义Filter实战

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本文介绍了如何在SpringBoot中使用拦截器，并对比了Servlet3.0中自定义Filter和Listener的实战应用，通过实例展示如何实现简单的HTTP请求处理。

第六章 SpringBoot拦截器实战和Servlet3.0自定义Filter和Listener

06-2 Servlet3.0的注解自定义原生Servlet实战

1.SpringBoot基础项目

在这里插入图片描述

2.原生Servlet实战

package com.lcz.spring_demo11.servlet;

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

/**
 * @author : codingchao
 * @date : 2021-11-23 13:08
 * @Description:
 **/
@WebServlet(urlPatterns = "/testServlet",name = "userServlet")
public class UserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().print("Test Servlet");
        resp.getWriter().flush();
        resp.getWriter().close();
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
}

启动类

package com.lcz.spring_demo11;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.context.annotation.ComponentScan;

@ServletComponentScan
@SpringBootApplication
public class SpringDemo11Application {

    public static void main(String[] args) {
        SpringApplication.run(SpringDemo11Application.class, args);
    }

}