Como criar o Spring Boot Rest Service mais simples ouvindo na porta 8081?

Publicados: 2020-08-18

Como criar o Spring Boot Rest Service mais simples ouvindo na porta 8081

Neste tutorial, abordaremos as etapas sobre como criar seu aplicativo Web Spring Boot mais simples que escuta na porta 8081?

Este tutorial é baseado no artigo 1st Spring Boot HelloWorld Application in IntelliJ IDEA abaixo.

Como criar o 1º aplicativo Spring Boot HelloWorld no IntelliJ IDEA com algumas etapas simples?

Certifique-se de seguir o tutorial acima e modificar as etapas 4 e 5.

Vamos começar:

Passo 1, 2 e 3.

Siga as etapas 1, 2 e 3 do tutorial do aplicativo Spring Boot acima.

Passo 4

  • Por favor, adicione dependências da Web do Spring Boot.
    • Primavera Web
    • Spring Web Services
    • Jersey
  • Clique em Avançar

Selecione as dependências da Web do IntelliJ IDEA

Passo-5

  • Abra o arquivo: CrunchifywebappApplication.java e coloque o código abaixo.
  • Certifique-se de alterar o pacote e o nome do arquivo se vir algum erro.

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package com . example . crunchify . crunchifywebapp ;
 
import org . springframework . boot . SpringApplication ;
import org . springframework . boot . autoconfigure . SpringBootApplication ;
import org . springframework . web . bind . annotation . GetMapping ;
import org . springframework . web . bind . annotation . RequestParam ;
import org . springframework . web . bind . annotation . RestController ;
 
/**
* @author Crunchify.com
* First Spring Hello World Web Application which listens on port 8081.
* Version: 1.0
*/
 
// SpringBootApplication: Indicates a configuration class that declares one or more @Bean methods and also triggers auto-configuration and component scanning.
// This is a convenience annotation that is equivalent to declaring @Configuration, @EnableAutoConfiguration and @ComponentScan.
 
// RestController: A convenience annotation that is itself annotated with @Controller and @ResponseBody.
// Types that carry this annotation are treated as controllers where @RequestMapping methods assume @ResponseBody semantics by default.
@ SpringBootApplication
@ RestController
public class CrunchifywebappApplication {
 
     public static void main ( String [ ] args ) {
 
         // setProperty: Sets the system property indicated by the specified key. First, if a security manager exists, its SecurityManager.checkPermission method is called with a PropertyPermission(key, "write") permission. This may result in a SecurityException being thrown.
         // If no exception is thrown, the specified property is set to the given value.
 
         System . setProperty ( "server.port" , "8081" ) ;
         System . setProperty ( "http.maxConnections" , "10" ) ;
 
         // run: Static helper that can be used to run a SpringApplication from the specified source using default settings
         SpringApplication . run ( CrunchifywebappApplication . class , args ) ;
     }
 
     @ GetMapping ( "/crunchify" )
     public String heyCrunchify ( @ RequestParam ( value = "name" , defaultValue = "there" ) String crunchify ) {
 
         return String . format ( "Hey %s! Congratulations on creating your first Spring Boot Rest Service... by https://crunchify.com" , crunchify ) ;
     }
}

Passo-6

  • Construir projeto
  • Clique com o botão direito do mouse no arquivo java e execute como um aplicativo

Você deve ver abaixo a saída do console.

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Java HotSpot ( TM ) 64 - Bit Server VM warning : Options - Xverify : none and - noverify were deprecated in JDK 13 and will likely be removed in a future release .
 
   .    ____            _              __ _ _
/ \ \ / ___ '_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | ' _ | '_| | ' _ \ / _ ` | \ \ \ \
\ \ /   ___ ) | | _ ) | | | | | | | ( _ | |    ) ) ) )
   '  |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot ::        (v2.3.3.RELEASE)
 
2020-08-17 13:07:33.379  INFO 71788 --- [           main] c.e.c.c.CrunchifywebappApplication       : Starting CrunchifywebappApplication on LM-AUN-11022307 with PID 71788 (/Users/appshah/crunchify/intellij/crunchifywebapp/target/classes started by arpshah in /Users/appshah/crunchify/intellij/crunchifywebapp)
2020-08-17 13:07:33.380  INFO 71788 --- [           main] c.e.c.c.CrunchifywebappApplication       : No active profile set, falling back to default profiles: default
2020-08-17 13:07:33.771  INFO 71788 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean ' org . springframework . ws . config . annotation . DelegatingWsConfiguration ' of type [org.springframework.ws.config.annotation.DelegatingWsConfiguration$EnhancerBySpringCGLIB$a474bef9] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-08-17 13:07:33.814  INFO 71788 --- [           main] .w.s.a.s.AnnotationActionEndpointMapping : Supporting [WS-Addressing August 2004, WS-Addressing 1.0]
2020-08-17 13:07:33.949  INFO 71788 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8081 (http)
2020-08-17 13:07:33.954  INFO 71788 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-08-17 13:07:33.954  INFO 71788 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.37]
2020-08-17 13:07:34.015  INFO 71788 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2020-08-17 13:07:34.016  INFO 71788 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 606 ms
2020-08-17 13:07:34.117  INFO 71788 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService ' applicationTaskExecutor '
2020-08-17 13:07:34.202  INFO 71788 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8081 (http) with context path ' '
2020 - 08 - 17 13 : 07 : 34.210    INFO 71788 --- [            main ] c . e . c . c . CrunchifywebappApplication        : Started CrunchifywebappApplication in 1.018 seconds ( JVM running for 1.418 )

Aqui está meu arquivo pom.xml com todas as dependências da web:

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<? 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 https://maven.apache.org/xsd/maven-4.0.0.xsd" >
     < modelVersion > 4.0.0 < / modelVersion >
     < parent >
         < groupId > org . springframework . boot < / groupId >
         < artifactId > spring - boot - starter - parent < / artifactId >
         < version > 2.3.3.RELEASE < / version >
         < relativePath / > < ! -- lookup parent from repository -- >
     < / parent >
     < groupId > com . example . crunchify < / groupId >
     < artifactId > crunchifywebapp < / artifactId >
     < version > 0.0.1 - SNAPSHOT < / version >
     < name > crunchifywebapp < / name >
     < description > Crunchify ' s Hello World Web project for Spring Boot < / description >
 
     < properties >
         < java . version > 11 < / java . version >
     < / properties >
 
     < dependencies >
         < dependency >
             < groupId > org . springframework . boot < / groupId >
             < artifactId > spring - boot - starter - jersey < / artifactId >
         < / dependency >
         < dependency >
             < groupId > org . springframework . boot < / groupId >
             < artifactId > spring - boot - starter - web < / artifactId >
         < / dependency >
         < dependency >
             < groupId > org . springframework . boot < / groupId >
             < artifactId > spring - boot - starter - web - services < / artifactId >
         < / dependency >
 
         < dependency >
             < groupId > org . springframework . boot < / groupId >
             < artifactId > spring - boot - starter - test < / artifactId >
             < scope > test < / scope >
             < exclusions >
                 < exclusion >
                     < groupId > org . junit . vintage < / groupId >
                     < artifactId > junit - vintage - engine < / artifactId >
                 < / exclusion >
             < / exclusions >
         < / dependency >
     < / dependencies >
 
     < build >
         < plugins >
             < plugin >
                 < groupId > org . springframework . boot < / groupId >
                 < artifactId > spring - boot - maven - plugin < / artifactId >
             < / plugin >
         < / plugins >
     < / build >
 
< / project >

Vamos começar nosso teste:

Teste-1

Visite o URL: http://localhost:8081/crunchify

Resultado do teste de inicialização da mola sem parâmetro de URL

Teste-2

Visite o URL: http://localhost:8081/crunchify?name=Crunchify

Resultado do teste de inicialização da mola com parâmetro de URL

Parabéns. Você criou com sucesso o Spring Boot Web Application no tempo mais rápido.