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This article introduces the knowledge of "how SpringBoot uses JSP in the project". Many people will encounter this dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Project structure after adding JSP support

Compared with the previous project structure main directory under the more webapp directory, used to store directory jsp files.

Spring-boot-jsp +-src +-main +-java +-resources +-webapp +-WEB-INF +-jsp +-welcome.jsp +-test +-pom.xml2. You need to specify the location and suffix spring.mvc.view.prefix: / WEB-INF/jsp/spring.mvc.view.suffix: .jsp3. Jsp in the configuration file. Introduce POM dependency

The spring-boot-starter-web package depends on spring-boot-starter-tomcat and does not need to be configured separately

Org.springframework.boot spring-boot-starter-web javax.servlet jstl org.apache.tomcat.embed tomcat-embed-jasper4. Write the jsp page Time: ${time}

Message: ${message} 5. Write background code @ Controllerpublic class WelcomeController {@ GetMapping ("/") public String welcome (Map model) {model.put ("time", new Date ()); model.put ("message", "hello world"); return "welcome";}} 6. Launch and access the page

Cd goes to the project root directory

Cd...\ spring-boot-jsp

Execute the following startup command

Mvn clean spring-boot:run

After startup is complete, access http://localhost:8080/ in the browser

Time: Sat Aug 11 13:26:35 CST 2018 Message: hello world7. Debugging and deployment

If you start the project directly through the main method in IDEA, as with other projects, 404 not found will appear when you access the test.

This is because the Spring Boot JSP project requires an additional setting: select the Edit Configurations option and open Run/Debug Configurations:

Set the path of Working directory to the project root path:

Then restart the project and you can access the page normally.

Run in a separate tomcat

Set the packaging format to war in pom.xml.

War

Eliminate embedded Tomcat dependencies; eliminate embedded Tomcat dependencies when packaging to avoid jar package conflicts

Org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-tomcat

Support for Servlet

The SpringBoot project must implement the configure () method of the SpringBootServletInitializer interface in order for the external container to run the SpringBoot project and start to create the ServletInitializer class in the same directory:

Public class ServletInitializer extends SpringBootServletInitializer {@ Override protected SpringApplicationBuilder configure (SpringApplicationBuilder application) {return application.sources (JspApplication.class);}}

Package the release and execute the maven command in the project root directory:

Mvn clean package

Publish war packages to Tomcat

8. Summary

Spring Boot supports running JSP; using embedded Tomcat as well as packaging the project as a War package and deploying it into a separate Tomcat. In actual projects, it is recommended to use a separate Tomcat to deploy projects that use JSP. The embedded Tomcat is not very stable, and there is occasional slow access.

This is the end of "how SpringBoot uses JSP in the project". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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