springBoot2.X 創建hello world

搭建springboot程序——hello world

• 引入依賴

  <parent>
        <artifactId>spring-boot-starter-parent</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.1.2.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-context</artifactId>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>

                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>1.2.3</version>
        </dependency>
    </dependencies>

• 創建類springBootHelloWorld

@RestController
@SpringBootApplication
public class SpringBootHelloWorld{

    @RequestMapping("hello")
    void helloWorld(){
        System.out.println("springboot hello world test");
    }

    public static void main(String[] args) {
        SpringApplication.run(SpringBootHelloWorld.class,args);
    }
    @Bean
    public TomcatServletWebServerFactory servletContainer(){
        return new TomcatServletWebServerFactory(8090) ;
    }

springBoot啓動端口默認爲8080，若端口已經被佔用，則會被拋出異常

• 默認端口修改爲8090

@RestController
@SpringBootApplication
public class SpringBootHelloWorld{

    @RequestMapping("hello")
    void helloWorld(){
        System.out.println("springboot hello world test");
    }

    public static void main(String[] args) {
        SpringApplication.run(SpringBootHelloWorld.class,args);
    }
    @Bean
    public TomcatServletWebServerFactory servletContainer(){
        return new TomcatServletWebServerFactory(8090) ;
    }

}

• 啓動main方法 

 

• 打包

maven pom.xml添加如下內容

<packaging>war</packaging>
    <build>
        <finalName>springHelloworld</finalName>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.7</version>
                <configuration>
                    <encoding>utf-8</encoding>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.18</version>
                <configuration>
                    <skipTests>true</skipTests>
                </configuration>
            </plugin>
        </plugins>
    </build>