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Spring Boot - @SpringBootApplication Examples

Spring Boot 

This example shows how @SpringBootApplication can be used for component scanning along with auto-configuration of MVC application. @SpringBootApplication is equivalent to using @Configuratin, @ComponentScanning and @EnableAutoConfiguration. 

package com.logicbig.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication
public class EnabledAutoConfigExample {

    public static void main (String[] args) {
        SpringApplication.run(EnabledAutoConfigExample.class, args);
    }
}
package com.logicbig.example;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class MyWebController {

    @Autowired
    private MyBean myBean;

    @RequestMapping("/")
    @ResponseBody
    public String theHandler () {
        return myBean.getMessage();
    }
}
package com.logicbig.example;

import org.springframework.stereotype.Component;

@Component
public class MyBean {
    public String getMessage () {
        return "a message from MyBean";
    }
}

pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelVersion>4.0.0</modelVersion>


 <groupId>com.logicbig.example</groupId>
 <artifactId>spring-boot-annotation</artifactId>
 <version>1.0-SNAPSHOT</version>

 <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>1.4.2.RELEASE</version>
 </parent>

 <properties>
  <java.version>1.8</java.version>
 </properties>
 <dependencies>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
 </dependencies>

</project>
Original Post




package com.logicbig.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.time.LocalDateTime;

@SpringBootApplication
public class JarWebappExplodedExample extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure (SpringApplicationBuilder builder) {
        return builder.sources(JarWebappExplodedExample.class);
    }

    public static void main (String[] args) {
        SpringApplication sa = new SpringApplication(JarWebappExplodedExample.class);
        sa.setLogStartupInfo(false);
        sa.run(args);
    }

    @Controller
    public static class MyController {

        @RequestMapping("/")
        public String handler (Model model) {
            model.addAttribute("date",
                               LocalDateTime.now());
            return "myPage";
        }
    }
}
Original Post

See Also