Spring Boot Hello World Exemple

Exemple de Spring Boot Hello World - JSP

Un exemple d'application WebSpring Boot, utilisantembedded Tomcat + JSP template et le package comme fichier WAR exécutable.

Technologies utilisées:

Spring Boot 1.4.2.RELEASE
Spring 4.3.4.RELEASE
Tomcat Embed 8.5.6
Maven 3
Java 8

1. Répertoire des projets

Créez manuellement les dossiers suivants:

spring-boot-web-jsp-project-directory

2. Dépendances du projet

Exemple Maven. Lisez les commentaires pour s'expliquer d'eux-mêmes.

pom.xml



    4.0.0

    spring-boot-web-jsp
    war
    Spring Boot Web JSP Example
    Spring Boot Web JSP Example
    https://www.example.com
    1.0

    
        org.springframework.boot
        spring-boot-starter-parent
        1.4.2.RELEASE
    

    
        1.8
    

    

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

        
        
            org.springframework.boot
            spring-boot-starter-tomcat
            provided
        

        
        
            javax.servlet
            jstl
        

        
        
            org.apache.tomcat.embed
            tomcat-embed-jasper
            provided
        

        
        
            org.eclipse.jdt.core.compiler
            ecj
            4.6.1
            provided
        

        
        
            org.webjars
            bootstrap
            3.3.7
        

    
    
        
            
            
                org.springframework.boot
                spring-boot-maven-plugin

Afficher les dépendances du projet:

$ mvn dependency:tree

[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Spring Boot Web JSP Example 1.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.10:tree (default-cli) @ spring-boot-web-jsp ---
[INFO] org.springframework.boot:spring-boot-web-jsp:war:1.0
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:1.4.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter:jar:1.4.2.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot:jar:1.4.2.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-autoconfigure:jar:1.4.2.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:1.4.2.RELEASE:compile
[INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.1.7:compile
[INFO] |  |  |  |  +- ch.qos.logback:logback-core:jar:1.1.7:compile
[INFO] |  |  |  |  \- org.slf4j:slf4j-api:jar:1.7.21:compile
[INFO] |  |  |  +- org.slf4j:jcl-over-slf4j:jar:1.7.21:compile
[INFO] |  |  |  +- org.slf4j:jul-to-slf4j:jar:1.7.21:compile
[INFO] |  |  |  \- org.slf4j:log4j-over-slf4j:jar:1.7.21:compile
[INFO] |  |  +- org.springframework:spring-core:jar:4.3.4.RELEASE:compile
[INFO] |  |  \- org.yaml:snakeyaml:jar:1.17:runtime
[INFO] |  +- org.hibernate:hibernate-validator:jar:5.2.4.Final:compile
[INFO] |  |  +- javax.validation:validation-api:jar:1.1.0.Final:compile
[INFO] |  |  +- org.jboss.logging:jboss-logging:jar:3.3.0.Final:compile
[INFO] |  |  \- com.fasterxml:classmate:jar:1.3.3:compile
[INFO] |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.8.4:compile
[INFO] |  |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.8.4:compile
[INFO] |  |  \- com.fasterxml.jackson.core:jackson-core:jar:2.8.4:compile
[INFO] |  +- org.springframework:spring-web:jar:4.3.4.RELEASE:compile
[INFO] |  |  +- org.springframework:spring-aop:jar:4.3.4.RELEASE:compile
[INFO] |  |  +- org.springframework:spring-beans:jar:4.3.4.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-context:jar:4.3.4.RELEASE:compile
[INFO] |  \- org.springframework:spring-webmvc:jar:4.3.4.RELEASE:compile
[INFO] |     \- org.springframework:spring-expression:jar:4.3.4.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-tomcat:jar:1.4.2.RELEASE:provided
[INFO] |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.5.6:provided
[INFO] |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.5.6:provided
[INFO] |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.5.6:provided
[INFO] +- javax.servlet:jstl:jar:1.2:compile
[INFO] +- org.apache.tomcat.embed:tomcat-embed-jasper:jar:8.5.6:provided
[INFO] +- org.eclipse.jdt.core.compiler:ecj:jar:4.6.1:provided
[INFO] \- org.webjars:bootstrap:jar:3.3.7:compile
[INFO]    \- org.webjars:jquery:jar:1.11.1:compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.327 s
[INFO] Finished at: 2016-11-28T16:57:00+08:00
[INFO] Final Memory: 20M/309M
[INFO] ------------------------------------------------------------------------

3. Spring Spring

3.1 This SpringBootServletInitializer run a SpringApplication from a traditional WAR deployment

SpringBootWebApplication.java

package com.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;

@SpringBootApplication
public class SpringBootWebApplication extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(SpringBootWebApplication.class);
    }

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

}

3.2 A simple Spring controller class.

WelcomeController.java

package com.example;

import java.util.Map;

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

@Controller
public class WelcomeController {

    // inject via application.properties
    @Value("${welcome.message:test}")
    private String message = "Hello World";

    @RequestMapping("/")
    public String welcome(Map model) {
        model.put("message", this.message);
        return "welcome";
    }

}

4. JSP + Ressources + Fichiers statiques

4.1 For JSP files, put in src/main/webapp/WEB-INF/jsp/

src/main/webapp/WEB-INF/jsp/welcome.jsp


<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>



    
    

    
    
    




    
        
            
                Spring Boot
            
            
                
                    Home
                    About
                
            
        
    

    

        
            Spring Boot Web JSP Example
            Message: ${message}

4.2 For static files like CSS or Javascript, put in /src/main/resources/static/

/src/main/resources/static/css/main.css

h1{
    color:#0000FF;
}

h2{
    color:#FF0000;
}

4.3 For properties files, put in /src/main/resources/

/src/main/resources/application.properties

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

welcome.message: Hello Mkyong

Note
Spring Boot, convention sur la configuration, pas besoin de déclarer le mappage de ressources commethis. Le mappage de ressources gère simplement automatiquement - Lire cet article -Spring Boot Serving static content

5. Demo

5.1 Start the Spring Boot web app.

project$ mvn spring-boot:run

//...
  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.4.2.RELEASE)

2016-11-28 17:25:24.809  INFO 4696 --- [           main] com.example.SpringBootWebApplication      : Starting SpringBootWebApplication on MKYONG-WIN10 with PID 4696 (C:\spring-boot\spring-boot-examples\spring-boot-web-jsp\target\classes started by example in C:\spring-boot\spring-boot-examples\spring-boot-web-jsp)
2016-11-28 17:25:24.812  INFO 4696 --- [           main] com.example.SpringBootWebApplication      : No active profile set, falling back to default profiles: default
2016-11-28 17:25:24.861  INFO 4696 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@69410cd3: startup date [Mon Nov 28 17:25:24 SGT 2016]; root of context hierarchy
2016-11-28 17:25:25.950  INFO 4696 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2016-11-28 17:25:25.965  INFO 4696 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
2016-11-28 17:25:25.966  INFO 4696 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.6
2016-11-28 17:25:26.171  INFO 4696 --- [ost-startStop-1] org.apache.jasper.servlet.TldScanner     : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2016-11-28 17:25:26.180  INFO 4696 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2016-11-28 17:25:26.180  INFO 4696 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1322 ms
2016-11-28 17:25:26.304  INFO 4696 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2016-11-28 17:25:26.312  INFO 4696 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2016-11-28 17:25:26.313  INFO 4696 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2016-11-28 17:25:26.313  INFO 4696 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2016-11-28 17:25:26.314  INFO 4696 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]

//...

2016-11-28 17:25:26.841  INFO 4696 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2016-11-28 17:25:26.846  INFO 4696 --- [           main] com.example.SpringBootWebApplication      : Started SpringBootWebApplication in 2.403 seconds (JVM running for 5.08)

5.2 Access http://localhost:8080

spring-boot-web-jsp-demo

5.3 Maven package the project as an executable WAR file. Un fichier 18M ++WAR sera généré dans le dossiertarget.

project$ mvn clean package

...
[INFO] Building war: ...\spring-boot-web-jsp\target\spring-boot-web-jsp-1.0.war
[INFO]
[INFO] --- spring-boot-maven-plugin:1.4.2.RELEASE:repackage (default) @ spring-boot-web-jsp ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

Exécutez-le, accédez à nouveau àhttp://localhost:8080.

project$ java -jar target/spring-boot-web-jsp-1.0.war

JSP limitations
Vous ne pouvez pas créer un exécutablejar pour exécuter cet exemple Web Tomcat + JSP intégré, en raison d'un modèle de fichier codé en dur dans Tomcat. Lisez ceciSpring Boot – JSP limitation.

Télécharger le code source

Téléchargez-le -spring-boot-web-jsp.zip (8KB)

TOC

Spring Boot Hello World Exemple - JSP

Exemple de Spring Boot Hello World - JSP

1. Répertoire des projets

2. Dépendances du projet

3. Spring Spring

4. JSP + Ressources + Fichiers statiques

Spring Boot Web JSP Example

Message: ${message}

5. Demo

Télécharger le code source

Références

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