Spring Boot整合Servlet_springboot整合servlet-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_38552532/article/details/82736745

本文详细介绍了如何在Spring Boot应用中整合Servlet，包括两种方式：一是通过注解扫描完成servlet组件注册，二是使用@Bean注解手动注册。文中列举了每种方式的具体步骤，帮助开发者更好地理解和实践。

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一、Servlet的配置文件式开发

1.创建一个web项目(项目名称为demo),并编写一个Servlet类。例如：FirstServlet extends HttpServlet

2.需要在web.xml中加入以下配置，以便servlet被web容器管理，这里的web容器为tomcat

<servlet>
    <servlet-name>FirstServlet</servlet-name>
    <servlet-class>com.dsgk.servlet.FirstServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>FirstServlet</servlet-name>
    <url-pattern>/firstServlet</url-pattern>
</servlet-mapping>

3.将项目部署到tomcat上，并启动tomcat，客户端浏览器访问路径http://localhost:8080/demo/firstServlet

二、Spring Boot整合Servlet

方式一：通过注解扫描完成servlet组件的注册

1. 编写servlet类

import java.io.IOException;

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

/**
    SpringBoot整合servlet方式一
**/
@WebServlet(name="FirstServlet", urlPatterns="/first")
public class FirstServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("FirstServlet.....");
    }

2. 编写启动类

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

@SpringBootApplication
@ServletComponentScan
public class App {
    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}

方式二：通过方法完成servlet组件的注册

1. 编写servlet类

import java.io.IOException;

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

/**
Spring Boot整合servlet方式二
**/
public class SecondServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("secondservlet.....");
    }
}

2. 编写启动类

@SpringBootApplication
public class App2 {
    public static void main(String[] args) {
        SpringApplication.run(App2.class, args);
    }

    @Bean
    public ServletRegistrationBean getServletRegistrationBean() {
        ServletRegistrationBean bean = new ServletRegistrationBean(new SecondServlet());
        bean.addUrlMappings("/second");
        return bean;
    }
}