Jak stworzyć najprostszą usługę Spring Boot Rest Service nasłuchującą na porcie 8081?

Opublikowany: 2020-08-18

Jak stworzyć najprostszą usługę Spring Boot Rest Service nasłuchującą na porcie 8081?

W tym samouczku omówimy, jak stworzyć najprostszą aplikację internetową Spring Boot, która nasłuchuje na porcie 8081?

Ten samouczek jest oparty na poniższej aplikacji Spring Boot HelloWorld w artykule IntelliJ IDEA.

Jak stworzyć pierwszą aplikację Spring Boot HelloWorld w IntelliJ IDEA w kilku prostych krokach?

Postępuj zgodnie z powyższym samouczkiem i zmodyfikuj kroki 4 i 5.

Zacznijmy:

Krok 1, 2 i 3.

Wykonaj kroki 1, 2 i 3 z powyższego samouczka aplikacji Spring Boot.

Krok 4

  • Proszę dodać zależności Spring Boot Web.
    • Wiosenna sieć
    • Wiosenne usługi internetowe
    • Golf
  • Kliknij Następny

Wybierz zależności sieciowe IntelliJ IDEA

Krok-5

  • Otwórz plik: CrunchifywebappApplication.java i umieść poniżej kod.
  • Pamiętaj, aby zmienić nazwę pakietu i pliku, jeśli zobaczysz jakiś błąd.

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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 ) ;
     }
}

Krok-6

  • Zbuduj projekt
  • Kliknij prawym przyciskiem myszy plik java i uruchom jako aplikację

Powinieneś zobaczyć poniżej dane wyjściowe konsoli.

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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 )

Oto mój plik pom.xml ze wszystkimi zależnościami sieciowymi:

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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 >

Zacznijmy nasz test:

Test-1

Odwiedź adres URL: http://localhost:8081/crunchify

Wynik testu wiosennego rozruchu bez parametru adresu URL

Test-2

Odwiedź adres URL: http://localhost:8081/crunchify?name=Crunchify

Wynik testu wiosennego rozruchu z parametrem URL

Gratulacje. Udało Ci się stworzyć aplikację internetową Spring Boot w najkrótszym czasie.