Shulou(Shulou.com)06/02 Report--

Today, I will talk to you about how SpringBoot integrates Servlet. Many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something according to this article.

SpringBoot integrates Servlet 1. Prepare the project:

To create a project using Spring Initializr, select the Web component

Second, method 1: through annotation method 1. Create a Servlet class

The @ WebServlet annotation needs to be added to the Servlet class, and the urlPatterns specifies the matching Url

/ / com.zhl.springbootweb.servlet.FirstServlet

Package com.zhl.springbootweb.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;/** integrates Servlet: * * / @ WebServlet (name = "FirstServlet", urlPatterns = "/ first") public class FirstServlet extends HttpServlet {@ Override protected void doGet (HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {System.out.println ("FirstServlet") }} 2. Modify startup class

Add @ ServletComponentScan annotation to the startup class

Package com.zhl.springbootweb;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.web.servlet.ServletComponentScan;@SpringBootApplication/* scans @ WebServlet annotations when SpringBoot starts, and instantiates * / @ ServletComponentScanpublic class SpringbootWebApplication {public static void main (String [] args) {SpringApplication.run (SpringbootWebApplication.class, args);} third, method 2: injection via Bean. Create Servlet

No need to add @ WebServlet annotation

/ / com.zhl.springbootweb.servlet.SecondServlet

Package com.zhl.springbootweb.servlet;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;/* integrates Servlet mode 2 * / public class SecondServlet extends HttpServlet {@ Override protected void doGet (HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {System.out.println ("SecondServlet");}} 2. Create a configuration class

Use @ Configuration to identify as the configuration class

Use @ Bean to identify as a component

AddUrlMappings method to add URL match

/ / com.zhl.springbootweb.config.ServletConfig

Package com.zhl.springbootweb.config;import com.zhl.springbootweb.servlet.SecondServlet;import org.springframework.boot.web.servlet.ServletRegistrationBean;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class ServletConfig {/ * complete Servlet component registration * / @ Bean public ServletRegistrationBean getServletRegistrationBean () {ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean (new SecondServlet ()); servletRegistrationBean.addUrlMappings ("/ second"); return servletRegistrationBean }} after reading the above, do you have any further understanding of how SpringBoot integrates Servlet? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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