springboot整合servlet

在idea新建项目

这个是pom.xml文件需要添加的依赖包

<properties>

        <java.version>1.8</java.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

    </dependencies>

新建一个servlet包

在这个包下面新建FirstServlet类

FirstServlet.java 类

package com.example.gong02.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;

/*

   * springboot 整合servlet方式一

   *

   <servlet>

   * <servlet-name>FirstServlet</servlet-name>

   * <servlet-class>com.bjsxt.servlet.FirstServlet</servlet-class>

   *</servlet>

   * *

   <servlet-mapping>

   * <servlet-name>FirstServlet</servlet-name>

   * <url-pattern>/first</url-pattern>

   *</servlet-mapping>

   * */

@WebServlet(name="FirstServlet",urlPatterns="/first")

public class FirstServlet extends HttpServlet {

    @Override

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

System.out.println("FistServlet..........");

    }

}

编写启动类

App.java类

package com.example.gong02;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.web.servlet.ServletComponentScan;

/**
 * SpringBoot 整合 Servlet 方式一
 * *
 */

@SpringBootApplication

 @ServletComponentScan

//在 springBoot 启动时会扫描@WebServlet， 并将该类实例化 

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

运行App.java

在浏览器输入

终端打印

下面介绍servlet的第二种整合方式

新建SecondServlet类

package com.example.gong02.servlet;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

/**

 * SpringBoot 整合 Servlet 方式二

 *

 */

public class SecondServlet extends HttpServlet{

    @Override

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

        System.out.println("SecondServlet.......");

    }

}

编写启动类App2.java

App2.java类

package com.example.gong02;

import com.example.gong02.servlet.SecondServlet;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.web.servlet.ServletRegistrationBean;

import org.springframework.context.annotation.Bean;

/**

 * SpringBoot 整合 Servlet 方式二

 * *

   */

@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;

    }

}

运行

在浏览器输入

可以看到终端打印出来了

注意了，大家在运行方式二的时候可能会出现8080端口被占用的情况导致tomcat无法启动，遇到这种情况可以重启一下idea就能解决了

巴特西

springboot整合servlet

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