springboot自学之路-02（创建springboot项目的三种方式）
新手入门，讲解一下创建springboot项目的三种方式。
目录
方式一：通过idea自带的spring initlalizr创建
方式二：通过https://start.spring.io/初始化创建（需联网）
方式三：自行创建
方式一：通过idea自带的spring initlalizr创建
打开idea，file->new->project->spring initializr->自行创建guava坐标一路next即可。
此时可以选择自己想添加的依赖，现在我们只需要添加一个简单的web依赖即可。
定义项目存储位置
点击finish即可完成项目的创建。
创建完成项目结构如下：
方式二：通过https://start.spring.io/初始化创建（需联网）
访问https://start.spring.io/ 与方法一类似，选择语言与springboot的版本，添加项目的guava坐标，添加依赖，点击explore按钮即可。
即将生成的项目结构如下，直接点击download按钮即可下载项目包。
即可得到一个zip包，下载后直接在idea里面通过pom.xml引入即可。
方式三：自行创建
通过idea新建maven项目，然后绑定parent为springboot，写一个启动方法即可。
直接点击next，填写guava坐标。
直接点击next
定义好项目的存储位置，直接点击finish即可完成。
生成的项目结构如下所示：
此时在pom文件中引入springboot为parent：
org.springframework.boot
spring-boot-starter-parent
2.2.6.RELEASE
然后引入web依赖：
org.springframework.boot
spring-boot-starter-web
可以看到依赖已经被引入：
然后新建一个启动方法：
package com.test.hello01;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* @Package: com.test.hello01
* @ClassName: ApplicationConfig
* @Description: Description:
* @author:
* @since: 2020/5/1 16:04
* @version: 1.0
* @Copyright: 2020 . All rights reserved.
*/
@SpringBootApplication
public class ApplicationConfig {
public static void main(String[] args) {
SpringApplication.run(ApplicationConfig.class, args);
}
}
如下图所示：
然后一个新建一个测试的controller
package com.test.hello01;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
/**
* @Package: com.test.hello01
* @ClassName: HelloController
* @Description: Description:
* @author:
* @since: 2020/5/1 16:06
* @version: 1.0
* @Copyright: 2020 . All rights reserved.
*/
@Controller
public class HelloController {
@RequestMapping("/hello")
@ResponseBody
public String helloPage() {
return "hello";
}
}
此时，启动 ApplicationConfig即可，默认端口号为8080，可以看到启动日志，看到springboot的banner，并且是使用springboot内嵌的tomcat 9 进行部署发布的。
D:\software\java\jdk_1.8\bin\java.exe -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=58504 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=localhost -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:D:\software\idea\IntelliJ IDEA 2018.3.1\lib\idea_rt.jar=58505:D:\software\idea\IntelliJ IDEA 2018.3.1\bin" -Dfile.encoding=UTF-8 -classpath D:\software\java\jdk_1.8\jre\lib\charsets.jar;D:\software\java\jdk_1.8\jre\lib\deploy.jar;D:\software\java\jdk_1.8\jre\lib\ext\access-bridge-64.jar;D:\software\java\jdk_1.8\jre\lib\ext\cldrdata.jar;D:\software\java\jdk_1.8\jre\lib\ext\dnsns.jar;D:\software\java\jdk_1.8\jre\lib\ext\jaccess.jar;D:\software\java\jdk_1.8\jre\lib\ext\jfxrt.jar;D:\software\java\jdk_1.8\jre\lib\ext\localedata.jar;D:\software\java\jdk_1.8\jre\lib\ext\nashorn.jar;D:\software\java\jdk_1.8\jre\lib\ext\sunec.jar;D:\software\java\jdk_1.8\jre\lib\ext\sunjce_provider.jar;D:\software\java\jdk_1.8\jre\lib\ext\sunmscapi.jar;D:\software\java\jdk_1.8\jre\lib\ext\sunpkcs11.jar;D:\software\java\jdk_1.8\jre\lib\ext\zipfs.jar;D:\software\java\jdk_1.8\jre\lib\javaws.jar;D:\software\java\jdk_1.8\jre\lib\jce.jar;D:\software\java\jdk_1.8\jre\lib\jfr.jar;D:\software\java\jdk_1.8\jre\lib\jfxswt.jar;D:\software\java\jdk_1.8\jre\lib\jsse.jar;D:\software\java\jdk_1.8\jre\lib\management-agent.jar;D:\software\java\jdk_1.8\jre\lib\plugin.jar;D:\software\java\jdk_1.8\jre\lib\resources.jar;D:\software\java\jdk_1.8\jre\lib\rt.jar;D:\document\svn_idea_ws\test\springparentsubject\myspringboot\target\classes;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\boot\spring-boot-starter-web\2.2.6.RELEASE\spring-boot-starter-web-2.2.6.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\boot\spring-boot-starter\2.2.6.RELEASE\spring-boot-starter-2.2.6.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\boot\spring-boot\2.2.6.RELEASE\spring-boot-2.2.6.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\boot\spring-boot-autoconfigure\2.2.6.RELEASE\spring-boot-autoconfigure-2.2.6.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\boot\spring-boot-starter-logging\2.2.6.RELEASE\spring-boot-starter-logging-2.2.6.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;D:\document\eclipse_workspace\local_repository\local_repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\slf4j\slf4j-api\1.7.30\slf4j-api-1.7.30.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\apache\logging\log4j\log4j-to-slf4j\2.12.1\log4j-to-slf4j-2.12.1.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\apache\logging\log4j\log4j-api\2.12.1\log4j-api-2.12.1.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\slf4j\jul-to-slf4j\1.7.30\jul-to-slf4j-1.7.30.jar;D:\document\eclipse_workspace\local_repository\local_repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\spring-core\5.2.5.RELEASE\spring-core-5.2.5.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\spring-jcl\5.2.5.RELEASE\spring-jcl-5.2.5.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\yaml\snakeyaml\1.25\snakeyaml-1.25.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\boot\spring-boot-starter-json\2.2.6.RELEASE\spring-boot-starter-json-2.2.6.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\com\fasterxml\jackson\core\jackson-databind\2.10.3\jackson-databind-2.10.3.jar;D:\document\eclipse_workspace\local_repository\local_repository\com\fasterxml\jackson\core\jackson-annotations\2.10.3\jackson-annotations-2.10.3.jar;D:\document\eclipse_workspace\local_repository\local_repository\com\fasterxml\jackson\core\jackson-core\2.10.3\jackson-core-2.10.3.jar;D:\document\eclipse_workspace\local_repository\local_repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.10.3\jackson-datatype-jdk8-2.10.3.jar;D:\document\eclipse_workspace\local_repository\local_repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.10.3\jackson-datatype-jsr310-2.10.3.jar;D:\document\eclipse_workspace\local_repository\local_repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.10.3\jackson-module-parameter-names-2.10.3.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\boot\spring-boot-starter-tomcat\2.2.6.RELEASE\spring-boot-starter-tomcat-2.2.6.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.33\tomcat-embed-core-9.0.33.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\apache\tomcat\embed\tomcat-embed-el\9.0.33\tomcat-embed-el-9.0.33.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.33\tomcat-embed-websocket-9.0.33.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\boot\spring-boot-starter-validation\2.2.6.RELEASE\spring-boot-starter-validation-2.2.6.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\jakarta\validation\jakarta.validation-api\2.0.2\jakarta.validation-api-2.0.2.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\hibernate\validator\hibernate-validator\6.0.18.Final\hibernate-validator-6.0.18.Final.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\jboss\logging\jboss-logging\3.4.1.Final\jboss-logging-3.4.1.Final.jar;D:\document\eclipse_workspace\local_repository\local_repository\com\fasterxml\classmate\1.5.1\classmate-1.5.1.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\spring-web\5.2.5.RELEASE\spring-web-5.2.5.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\spring-beans\5.2.5.RELEASE\spring-beans-5.2.5.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\spring-webmvc\5.2.5.RELEASE\spring-webmvc-5.2.5.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\spring-aop\5.2.5.RELEASE\spring-aop-5.2.5.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\spring-context\5.2.5.RELEASE\spring-context-5.2.5.RELEASE.jar;D:\document\eclipse_workspace\local_repository\local_repository\org\springframework\spring-expression\5.2.5.RELEASE\spring-expression-5.2.5.RELEASE.jar com.test.hello01.ApplicationConfig
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:: Spring Boot :: (v2.2.6.RELEASE)
2020-05-01 16:10:00.570 INFO 11336 --- [ main] com.test.hello01.ApplicationConfig : Starting ApplicationConfig on LAPTOP-SRJM9GEI with PID 11336 (D:\document\svn_idea_ws\test\springparentsubject\myspringboot\target\classes started by 张琴 in D:\document\svn_idea_ws\test\springparentsubject\myspringboot)
2020-05-01 16:10:00.572 INFO 11336 --- [ main] com.test.hello01.ApplicationConfig : No active profile set, falling back to default profiles: default
2020-05-01 16:10:01.245 INFO 11336 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-05-01 16:10:01.252 INFO 11336 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-05-01 16:10:01.252 INFO 11336 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.33]
2020-05-01 16:10:01.342 INFO 11336 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-05-01 16:10:01.342 INFO 11336 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 742 ms
2020-05-01 16:10:01.463 INFO 11336 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-05-01 16:10:01.557 INFO 11336 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-05-01 16:10:01.559 INFO 11336 --- [ main] com.test.hello01.ApplicationConfig : Started ApplicationConfig in 1.306 seconds (JVM running for 2.283)
直接访问:http://localhost:8080/hello
可以得到返回值：
