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SpringBoot - 02HelloWorld

Posted on 2020-12-11 20:44  Kingdomer  阅读(117)  评论(0)  编辑  收藏  举报

SpringBoot - 02HelloWorld

（一）启动类

@SpringBootApplication
public class Demo2SpringBootApplication {
    public static void main(String[] args) {
        SpringApplication.run(Demo2SpringBootApplication.class,args);
    }
}

 

（二）POM文件

<?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 http://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>2.2.0.RELEASE</version>
        <relativePath/>
    </parent>

    <groupId>org.bearpx</groupId>
    <artifactId>demo2</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

 

（三）启动日志

"D:\Program Files (x86)\Java\jdk1.8.0_241\bin\java.exe" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.1.3\lib\idea_rt.jar=60125:D:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.1.3\bin" -Dfile.encoding=UTF-8 -classpath "D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\charsets.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\deploy.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\access-bridge-64.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\cldrdata.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\dnsns.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\jaccess.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\jfxrt.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\localedata.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\nashorn.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\sunec.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\sunjce_provider.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\sunmscapi.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\sunpkcs11.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\ext\zipfs.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\javaws.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\jce.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\jfr.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\jfxswt.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\jsse.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\management-agent.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\plugin.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\resources.jar;D:\Program Files (x86)\Java\jdk1.8.0_241\jre\lib\rt.jar;E:\javaProgram\demo2\target\classes;E:\MavenRepository\org\springframework\boot\spring-boot-starter-web\2.2.0.RELEASE\spring-boot-starter-web-2.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\boot\spring-boot-starter\2.2.0.RELEASE\spring-boot-starter-2.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\boot\spring-boot\2.2.0.RELEASE\spring-boot-2.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\boot\spring-boot-autoconfigure\2.2.0.RELEASE\spring-boot-autoconfigure-2.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\boot\spring-boot-starter-logging\2.2.0.RELEASE\spring-boot-starter-logging-2.2.0.RELEASE.jar;E:\MavenRepository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;E:\MavenRepository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;E:\MavenRepository\org\apache\logging\log4j\log4j-to-slf4j\2.12.1\log4j-to-slf4j-2.12.1.jar;E:\MavenRepository\org\apache\logging\log4j\log4j-api\2.12.1\log4j-api-2.12.1.jar;E:\MavenRepository\org\slf4j\jul-to-slf4j\1.7.28\jul-to-slf4j-1.7.28.jar;E:\MavenRepository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;E:\MavenRepository\org\yaml\snakeyaml\1.25\snakeyaml-1.25.jar;E:\MavenRepository\org\springframework\boot\spring-boot-starter-json\2.2.0.RELEASE\spring-boot-starter-json-2.2.0.RELEASE.jar;E:\MavenRepository\com\fasterxml\jackson\core\jackson-databind\2.10.0\jackson-databind-2.10.0.jar;E:\MavenRepository\com\fasterxml\jackson\core\jackson-annotations\2.10.0\jackson-annotations-2.10.0.jar;E:\MavenRepository\com\fasterxml\jackson\core\jackson-core\2.10.0\jackson-core-2.10.0.jar;E:\MavenRepository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.10.0\jackson-datatype-jdk8-2.10.0.jar;E:\MavenRepository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.10.0\jackson-datatype-jsr310-2.10.0.jar;E:\MavenRepository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.10.0\jackson-module-parameter-names-2.10.0.jar;E:\MavenRepository\org\springframework\boot\spring-boot-starter-tomcat\2.2.0.RELEASE\spring-boot-starter-tomcat-2.2.0.RELEASE.jar;E:\MavenRepository\org\apache\tomcat\embed\tomcat-embed-core\9.0.27\tomcat-embed-core-9.0.27.jar;E:\MavenRepository\org\apache\tomcat\embed\tomcat-embed-el\9.0.27\tomcat-embed-el-9.0.27.jar;E:\MavenRepository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.27\tomcat-embed-websocket-9.0.27.jar;E:\MavenRepository\org\springframework\boot\spring-boot-starter-validation\2.2.0.RELEASE\spring-boot-starter-validation-2.2.0.RELEASE.jar;E:\MavenRepository\jakarta\validation\jakarta.validation-api\2.0.1\jakarta.validation-api-2.0.1.jar;E:\MavenRepository\org\hibernate\validator\hibernate-validator\6.0.17.Final\hibernate-validator-6.0.17.Final.jar;E:\MavenRepository\org\jboss\logging\jboss-logging\3.4.1.Final\jboss-logging-3.4.1.Final.jar;E:\MavenRepository\com\fasterxml\classmate\1.5.0\classmate-1.5.0.jar;E:\MavenRepository\org\springframework\spring-web\5.2.0.RELEASE\spring-web-5.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\spring-beans\5.2.0.RELEASE\spring-beans-5.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\spring-webmvc\5.2.0.RELEASE\spring-webmvc-5.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\spring-aop\5.2.0.RELEASE\spring-aop-5.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\spring-context\5.2.0.RELEASE\spring-context-5.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\spring-expression\5.2.0.RELEASE\spring-expression-5.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\boot\spring-boot-starter-thymeleaf\2.2.0.RELEASE\spring-boot-starter-thymeleaf-2.2.0.RELEASE.jar;E:\MavenRepository\org\thymeleaf\thymeleaf-spring5\3.0.11.RELEASE\thymeleaf-spring5-3.0.11.RELEASE.jar;E:\MavenRepository\org\thymeleaf\thymeleaf\3.0.11.RELEASE\thymeleaf-3.0.11.RELEASE.jar;E:\MavenRepository\org\attoparser\attoparser\2.0.5.RELEASE\attoparser-2.0.5.RELEASE.jar;E:\MavenRepository\org\unbescape\unbescape\1.1.6.RELEASE\unbescape-1.1.6.RELEASE.jar;E:\MavenRepository\org\slf4j\slf4j-api\1.7.28\slf4j-api-1.7.28.jar;E:\MavenRepository\org\thymeleaf\extras\thymeleaf-extras-java8time\3.0.4.RELEASE\thymeleaf-extras-java8time-3.0.4.RELEASE.jar;E:\MavenRepository\org\springframework\boot\spring-boot-starter-test\2.2.0.RELEASE\spring-boot-starter-test-2.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\boot\spring-boot-test\2.2.0.RELEASE\spring-boot-test-2.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\boot\spring-boot-test-autoconfigure\2.2.0.RELEASE\spring-boot-test-autoconfigure-2.2.0.RELEASE.jar;E:\MavenRepository\com\jayway\jsonpath\json-path\2.4.0\json-path-2.4.0.jar;E:\MavenRepository\net\minidev\json-smart\2.3\json-smart-2.3.jar;E:\MavenRepository\net\minidev\accessors-smart\1.2\accessors-smart-1.2.jar;E:\MavenRepository\org\ow2\asm\asm\5.0.4\asm-5.0.4.jar;E:\MavenRepository\jakarta\xml\bind\jakarta.xml.bind-api\2.3.2\jakarta.xml.bind-api-2.3.2.jar;E:\MavenRepository\jakarta\activation\jakarta.activation-api\1.2.1\jakarta.activation-api-1.2.1.jar;E:\MavenRepository\org\junit\jupiter\junit-jupiter\5.5.2\junit-jupiter-5.5.2.jar;E:\MavenRepository\org\junit\jupiter\junit-jupiter-api\5.5.2\junit-jupiter-api-5.5.2.jar;E:\MavenRepository\org\opentest4j\opentest4j\1.2.0\opentest4j-1.2.0.jar;E:\MavenRepository\org\junit\platform\junit-platform-commons\1.5.2\junit-platform-commons-1.5.2.jar;E:\MavenRepository\org\junit\jupiter\junit-jupiter-params\5.5.2\junit-jupiter-params-5.5.2.jar;E:\MavenRepository\org\junit\jupiter\junit-jupiter-engine\5.5.2\junit-jupiter-engine-5.5.2.jar;E:\MavenRepository\org\junit\vintage\junit-vintage-engine\5.5.2\junit-vintage-engine-5.5.2.jar;E:\MavenRepository\org\apiguardian\apiguardian-api\1.1.0\apiguardian-api-1.1.0.jar;E:\MavenRepository\org\junit\platform\junit-platform-engine\1.5.2\junit-platform-engine-1.5.2.jar;E:\MavenRepository\junit\junit\4.12\junit-4.12.jar;E:\MavenRepository\org\mockito\mockito-junit-jupiter\3.1.0\mockito-junit-jupiter-3.1.0.jar;E:\MavenRepository\org\assertj\assertj-core\3.13.2\assertj-core-3.13.2.jar;E:\MavenRepository\org\hamcrest\hamcrest\2.1\hamcrest-2.1.jar;E:\MavenRepository\org\mockito\mockito-core\3.1.0\mockito-core-3.1.0.jar;E:\MavenRepository\net\bytebuddy\byte-buddy\1.10.1\byte-buddy-1.10.1.jar;E:\MavenRepository\net\bytebuddy\byte-buddy-agent\1.10.1\byte-buddy-agent-1.10.1.jar;E:\MavenRepository\org\objenesis\objenesis\2.6\objenesis-2.6.jar;E:\MavenRepository\org\skyscreamer\jsonassert\1.5.0\jsonassert-1.5.0.jar;E:\MavenRepository\com\vaadin\external\google\android-json\0.0.20131108.vaadin1\android-json-0.0.20131108.vaadin1.jar;E:\MavenRepository\org\springframework\spring-core\5.2.0.RELEASE\spring-core-5.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\spring-jcl\5.2.0.RELEASE\spring-jcl-5.2.0.RELEASE.jar;E:\MavenRepository\org\springframework\spring-test\5.2.0.RELEASE\spring-test-5.2.0.RELEASE.jar;E:\MavenRepository\org\xmlunit\xmlunit-core\2.6.3\xmlunit-core-2.6.3.jar" com.bearpx.demo2.Demo2SpringBootApplication

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.0.RELEASE)

2020-10-31 13:52:03.907  INFO 6088 --- [           main] c.b.demo2.Demo2SpringBootApplication     : Starting Demo2SpringBootApplication on SC-202003181202 with PID 6088 (E:\javaProgram\demo2\target\classes started by Administrator in E:\javaProgram\demo2)
2020-10-31 13:52:03.911  INFO 6088 --- [           main] c.b.demo2.Demo2SpringBootApplication     : No active profile set, falling back to default profiles: default
2020-10-31 13:52:05.846  INFO 6088 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2020-10-31 13:52:05.857  INFO 6088 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-10-31 13:52:05.857  INFO 6088 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.27]
2020-10-31 13:52:05.991  INFO 6088 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2020-10-31 13:52:05.991  INFO 6088 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1937 ms
2020-10-31 13:52:06.221  INFO 6088 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2020-10-31 13:52:06.311  INFO 6088 --- [           main] o.s.b.a.w.s.WelcomePageHandlerMapping    : Adding welcome page template: index
2020-10-31 13:52:06.486  INFO 6088 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2020-10-31 13:52:06.489  INFO 6088 --- [           main] c.b.demo2.Demo2SpringBootApplication     : Started Demo2SpringBootApplication in 3.234 seconds (JVM running for 3.954)
2020-10-31 13:52:07.873  INFO 6088 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-10-31 13:52:07.873  INFO 6088 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2020-10-31 13:52:07.881  INFO 6088 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 8 ms

 

（四）访问

访问http://localhost:8080

 

 

（五）简单Demo

 Controller代码

@RestController
public class HelloController  {

    @GetMapping("/hello")
    public String hello(){
        System.out.println("进入到 hello 方法中......");
        return "hello Spring!!!";
    }
}

访问