为什么我在运行一个简单的 spring 启动 gradle 项目时得到 404 状态？

Question

I am new to spring-boot. I have created a simple spring-boot version 2.2.6 project with gradle build. I have created a welcome jsp just to print a header. I get 404 status when i run it on my server with http://localhost:8081/welcome.html Following is my build.gradle, application class, controller class and application.properties file:

//build.gradle    
plugins {
    id 'org.springframework.boot' version '2.2.6.RELEASE'
    id 'io.spring.dependency-management' version '1.0.9.RELEASE'
    id 'java'
    }

    group = 'com.banuprojects'
    version = '0.0.1-SNAPSHOT'
    sourceCompatibility = '11'

    repositories {
        mavenCentral()
    }

    dependencies {
        implementation 'org.springframework.boot:spring-boot-starter-web'
        implementation 'org.apache.tomcat.embed:tomcat-embed-jasper'
        implementation 'javax.servlet:jstl'
        testImplementation('org.springframework.boot:spring-boot-starter-test') {
            exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
        }
    }

    test {
        useJUnitPlatform()
    }

//application class
        package com.banuprojects.lmsdemo;

    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;

    @SpringBootApplication
    public class LmsdemoApplication {

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

    }

    //controller class
        package com.banuprojects.lmsdemo;

        import org.springframework.stereotype.Controller;
        import org.springframework.web.bind.annotation.RequestMapping;
        import org.springframework.web.servlet.ModelAndView;

        @Controller
        public class TestController {

            @RequestMapping("/welcome.html")
            public ModelAndView firstPage() {
                return new ModelAndView("welcome");
            }

        }

//application.properties
        spring.mvc.view.prefix:/WEB-INF/jsp/
        spring.mvc.view.suffix:.jsp

I am not sure where I have one wrong with the implementation. Any help will be appreciated. Thank you

Answer 1

As discussed over the comments. After seeing the application properties file, found that wrong port was passed in the URL.
No other technical error found.