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1. 创建Spring Boot项目
- 创建一个新的Module,选择
Spring Initializer
-
点击
next，在新的界面中填写以下信息
-
选择
Web --> Web，点击next：
- 点击
Finish，完成创建.
- 创建好的工程结构如下图所示，在
com.lucy.boot1包下有一个自动生成的Boot1Application类，该类是Spring Boot项目的启动类，运行其中的主方法，项目就可以启动了，十分简单快捷。
2. 创建Spring Boot项目
Boot1Application类的内容如下
package com.lucy.boot1;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@SpringBootApplication
public class Boot1Application {
@RequestMapping("/")
public String helloSpringBoot(){
System.out.println("Hello Spring Boot");
return "Hello Spring Boot";
}
public static void main(String[] args) {
SpringApplication.run(Boot1Application.class, args);
}
}
@SpringBootApplication是Sprnig Boot项目的核心注解，主要目的是开启自动配置。
@RestController注解等价于@Controller+@ResponseBody的结合，使用这个注解的类里面的方法都以json格式输出。
@RequestMapping此注解提供的是路由信息。它告诉Spring任何来自“/”路径的请求都会被映射到helloSpringBoot()方法。
- 以
Run “Boot1Application”的方式启动项目，发现他会自动启动tomcat，运行端口为8080。
在浏览器中输入http://localhost:8080/，显示内容如下：
- 以
mvn spring-boot:run的方式启动项目，发现与Run “Boot1Application”的方式一样，启动信息如下:
C:\Users\lucy\IdeaProjects\boot1> mvn spring-boot:run
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building boot1 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> spring-boot-maven-plugin:2.1.3.RELEASE:run (default-cli) > test-compile @ boot1 >>>
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ boot1 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.0:compile (default-compile) @ boot1 ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to C:\Users\lucy\IdeaProjects\boot1\target\classes
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ boot1 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\Users\lucy\IdeaProjects\boot1\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.0:testCompile (default-testCompile) @ boot1 ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to C:\Users\lucy\IdeaProjects\boot1\target\test-classes
[INFO]
[INFO] <<< spring-boot-maven-plugin:2.1.3.RELEASE:run (default-cli) < test-compile @ boot1 <<<
[INFO]
[INFO]
[INFO] --- spring-boot-maven-plugin:2.1.3.RELEASE:run (default-cli) @ boot1 ---
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.3.RELEASE)
2019-03-12 14:27:14.740 INFO 2100 --- [ main] com.lucy.boot1.Boot1Application : Starting Boot1Application on DESKTOP-58RL20I with PID 2100 (C:\Users\lucy\IdeaProjects\boot1\target\classes started by lucy in C:\Us
ers\lucy\IdeaProjects\boot1)
2019-03-12 14:27:14.744 INFO 2100 --- [ main] com.lucy.boot1.Boot1Application : No active profile set, falling back to default profiles: default
2019-03-12 14:27:15.783 INFO 2100 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-03-12 14:27:15.807 INFO 2100 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-03-12 14:27:15.807 INFO 2100 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.16]
2019-03-12 14:27:15.817 INFO 2100 --- [ main] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.lib
rary.path: [C:\Program Files\java\jdk\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Python27\;C:\Python27\Scripts;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\iCLS\;C:\Program Files\Intel\Intel(
R) Management Engine Components\iCLS\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Component
s\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files (x86
)\Windows Kits\8.1\Windows Performance Toolkit\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\Git\cmd;C:\Program Files\TortoiseGit\bin;C:\Python36\;C:\Python36\Scripts\;C:\Program Files\apache-maven-3.5.2\bi
n;C:\Program Files\java\jdk\bin;"C:\Program Files\apache-tomcat8\bin;C:\Program Files\apache-tomcat8\lib";C:\Program Files\mysql5.7\bin;C:\Python36\Scripts\;C:\Python36\;C:\Program Files (x86)\MPICH2\bin;;.]
2019-03-12 14:27:15.905 INFO 2100 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-03-12 14:27:15.905 INFO 2100 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1117 ms
2019-03-12 14:27:16.119 INFO 2100 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-03-12 14:27:16.292 INFO 2100 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2019-03-12 14:27:16.297 INFO 2100 --- [ main] com.lucy.boot1.Boot1Application : Started Boot1Application in 1.862 seconds (JVM running for 4.912)
- 选择
maven --> package进行打包时，会打包成一个可以直接运行的 JAR 文件，使用java -jar命令就可以直接运行。
打包成功，显示信息如下：
工程目录中，会有相应的jar包出现：
打开cmd，切换到jar包所在目录：
>cd C:\Users\lucy\IdeaProjects\boot1\target
>java -jar boot1-0.0.1-SNAPSHOT.jar
运行结果如下，也可以在浏览器中查看信息。
参考链接：
Spring Boot干货系列：（一）优雅的入门篇
使用IntelliJ IDEA创建SpringBoot项目
快速创建springboot项目：使用http://start.spring.io/网页创建，使用IDEA的Spring Initializr创建，使用SpringBoot CLI创建