Introducing Spring Framework

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Chapter 1 ■ Your First Spring Application } url "http://repo.spring.io/libs-snapshot" url 'http://repo.spring.io/milestone' url 'http://repo.spring.io/libs-release' } Listing 1-5 shows that instead of adding the Spring Framework dependency, now you are using a spring-boot-starter that will actually help to wire up everything to run this application as a web application. Listing 1-6 shows your main class, the HelloWorldController; this class introduces new annotations that will help the Spring container know what to do and create the necessary collaboration classes and run it as a web application. Listing 1-6. HelloWorldController.java package com.apress.isf.spring; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; @Controller @EnableAutoConfiguration public class HelloWorldController { @RequestMapping("/") @ResponseBody String getMessage() { return "Hello World!"; } } public static void main(String[] args) throws Exception { SpringApplication.run(HelloWorldController.class, args); } The @Controller annotation will mark your class as a web controller that has a @RequestMapping and a @ResponseBody. All this means is that when your web application is running, it will accept requests from the http://localhost:8080/ URL and you should get some response back, such as the famous “Hello World” message. Running the Spring Boot Application Run the HelloWorldClass with the following command: gradle - run -DmainClass=com.apress.isf.spring.HelloWorldController 9
Chapter 1 ■ Your First Spring Application You should have the following output after executing the gradle command: isf-book$ gradle run -DmainClass=com.apress.isf.spring.HelloWorldController :ch01:compileJava UP-TO-DATE :ch01:compileGroovy UP-TO-DATE :ch01:processResources UP-TO-DATE :ch01:classes UP-TO-DATE :ch01:run :: Spring Boot :: (v1.0.2.RELEASE) INFO 84872 --- [main] .t.TomcatEmbeddedServletContainerFactory : Server initialized with port: 8080 INFO 84872 --- [main] o.apache.catalina.core.StandardService : Starting service Tomcat INFO 84872 --- [main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/7.0.52 INFO 84872 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext INFO 84872 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2030 ms INFO 84872 --- [main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080/http INFO 84872 --- [main] c.a.isf.spring.HelloWorldController : Started HelloWorldController in 7.086 seconds (JVM running for 7.599) > Building 80% > :ch01:run Now you can go to any browser and type in the URL http://localhost:8080 (see Figure 1-3). Figure 1-3. Spring Boot Web Page 10
Page 1 and 2: THE EXPERT’S VOICE ® IN SPRING
Page 3 and 4: Contents at a Glance About the Auth
Page 5 and 6: Introduction This book is an introd
Page 7 and 8: Part I Spring Framework Basics The
Page 9 and 10: Chapter 1 ■ Your First Spring App
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Page 19 and 20: Chapter 2 ■ Working with Classes
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Chapter 6 ■ Using Resource Files
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Chapter 7 Testing Your Spring Appli
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Chapter 8 Give Advice to Your Sprin
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Chapter 10 ■ Showing Your Spring
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Chapter 11 ■ Integrating Your Spr
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Chapter 12 Exposing a REST API Nowa
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Chapter 12 ■ Exposing a REST API
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HTTP-DELETE Chapter 12 ■ Exposing
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Chapter 13 Adding E-mail and Schedu
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Part III Spring Framework Advanced
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Chapter 14 ■ Using Dynamic Langua
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Chapter 15 ■ Spring Data Within Y
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Chapter 16 ■ Messaging with Your
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Chapter 17 Be Social and Go Mobile
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Chapter 17 ■ Be Social and Go Mob
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Part IV Spring I/O Spring I/O is no
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Chapter 18 ■ Spring and Groovy
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Chapter 19 ■ Spring Boot, Simplif
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Chapter 20 ■ Your First Spring XD
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Appendix A Installing Tools In this
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Appendix A ■ Installing Tools Fig
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Setting Environment Variables Appen
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Appendix A ■ Installing Tools 6.
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Stop MongoDB Server Appendix A ■
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Stop ActiveMQ Appendix A ■ Instal
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Installing RabbitMQ on Windows Appe
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Installing Spring XD on Windows App
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■ index • I I/O operations, 62
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■ index Spring application (cont.
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Introducing Spring Framework A Prim
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To my parents, Rocio Cruz and Felip
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■ Contents ■■Chapter 3: Apply
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■ Contents ■■Chapter 12: Expo
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■ Contents ■■Chapter 20: Your
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About the Author Felipe Gutierrez i
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Acknowledgments I would like to exp
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Introducing Spring Framework

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