Spring Boot非web应用程序实例(十三)

小鱼儿 2022-05-16 01:30 335阅读 0赞

> 这篇博文主要用于新手学习Spring Boot，同时也记录自己学习的过程…  
> 文章内容主要来源于[易百教程][Link 1]

在Spring Boot中，要创建一个非Web应用程序，实现`CommandLineRunner`并覆盖run()方法，例如：

import org.springframework.boot.CommandLineRunner;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    @SpringBootApplication
    public class SpringBootConsoleApplication implements CommandLineRunner { 
    
        public static void main(String[] args) throws Exception {
    
            SpringApplication.run(SpringBootConsoleApplication.class, args);
    
        }
    
        //access command line arguments
        @Override
        public void run(String... args) throws Exception {
            //do something
        }
    }

**1．项目结构**

--------------------

一个标准的Maven项目结构。如下所示-  
![这里写图片描述][20180808161118873]  
  
  
**2．项目依赖**

--------------------

只有依赖`spring-boot-starter`库，参考如下`pom.xml`\-

<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>
    
        <groupId>com.th</groupId>
        <artifactId>spring-boot-non-web</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>spring-boot-non-web</name>
        <url>http://maven.apache.org</url>
    
        <properties>
            <java.version>1.8</java.version>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>3.8.1</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
        </dependencies>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.1.RELEASE</version>
        </parent>
    
        <build>
            <plugins>
                
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    </project>

**3．Spring**

--------------------

返回消息的服务，如下 HelloMessageService.java 代码所示 -

package com.th.service;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.stereotype.Service;
    
    @Service
    public class HelloMessageService { 
    
        @Value("${name:unknown}")
        private String name;
    
        public String getMessage() {
            return getMessage(name);
        }
    
        public String getMessage(String name) {
            return "Hello " + name;
        }
    
    }

属性文件配置文件： application.properties 如下所示 -

name=nicole

下面是CommandLineRunner示例,如果运行这个Spring Boot，那么run方法将是入口点。  
SpringBootConsoleApplication.java 代码内容如下所示 –

package com.th;
    
    import static java.lang.System.exit;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.Banner;
    import org.springframework.boot.CommandLineRunner;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    import com.th.service.HelloMessageService;
    
    @SpringBootApplication
    public class SpringBootConsoleApplication implements CommandLineRunner { 
    
        @Autowired
        private HelloMessageService helloService;
    
        public static void main(String[] args) throws Exception {
    
            //disabled banner, don't want to see the spring logo
            SpringApplication app = new SpringApplication(SpringBootConsoleApplication.class);
            app.setBannerMode(Banner.Mode.OFF);
            app.run(args);
    
        }
    
        // Put your logic here.
        @Override
        public void run(String... args) throws Exception {
    
            if (args.length > 0) {
                System.out.println(helloService.getMessage(args[0].toString()));
            } else {
                System.out.println(helloService.getMessage());
            }
    
            exit(0);
        }
    }

**4．实例运行演示**

--------------------

打包上面的项目并运行它，如下命令-

D:\workspace\spring-boot-non-web>mvn package
    [INFO] Scanning for projects...
    [INFO]
    [INFO] ------------------------------------------------------------------------
    [INFO] Building spring-boot-non-web 0.0.1-SNAPSHOT
    [INFO] ------------------------------------------------------------------------
    [INFO]
    [INFO] --- maven-resources-plugin:3.0.1:resources (default-resources) @ spring-boot-non-we
    b ---
    [INFO] Using 'UTF-8' encoding to copy filtered resources.
    [INFO] Copying 1 resource
    [INFO] Copying 2 resources
    [INFO]
    [INFO] --- maven-compiler-plugin:3.7.0:compile (default-compile) @ spring-boot-non-web ---
    
    [INFO] Nothing to compile - all classes are up to date
    [INFO]
    [INFO] --- maven-resources-plugin:3.0.1:testResources (default-testResources) @ spring-boo
    t-non-web ---
    [INFO] Using 'UTF-8' encoding to copy filtered resources.
    [INFO] skip non existing resourceDirectory D:\workspace\spring-boot-non-web\src\test\resou
    rces
    [INFO]
    [INFO] --- maven-compiler-plugin:3.7.0:testCompile (default-testCompile) @ spring-boot-non
    -web ---
    [INFO] Nothing to compile - all classes are up to date
    [INFO]
    [INFO] --- maven-surefire-plugin:2.21.0:test (default-test) @ spring-boot-non-web ---
    [INFO]
    [INFO] --- maven-jar-plugin:3.0.2:jar (default-jar) @ spring-boot-non-web ---
    [INFO] Building jar: D:\workspace\spring-boot-non-web\target\spring-boot-non-web-0.0.1-SNA
    PSHOT.jar
    [INFO]
    [INFO] --- spring-boot-maven-plugin:2.0.3.RELEASE:repackage (default) @ spring-boot-non-we
    b ---
    [INFO] ------------------------------------------------------------------------
    [INFO] BUILD SUCCESS
    [INFO] ------------------------------------------------------------------------
    [INFO] Total time: 4.431 s
    [INFO] Finished at: 2018-08-08T15:22:00+08:00
    [INFO] Final Memory: 21M/261M
    [INFO] ------------------------------------------------------------------------
    
    D:\workspace\spring-boot-non-web>java -jar target/spring-boot-non-web-0.0.1-SNAPSHOT.jar
    2018-08-08 15:22:26.903  INFO 6948 --- [ main] com.th.SpringBootConsoleApplicati
    on      : Starting SpringBootConsoleApplication v0.0.1-SNAPSHOT on SZ10PD0703 with PID 694
    8 (D:\workspace\spring-boot-non-web\target\spring-boot-non-web-0.0.1-SNAPSHOT.jar started
    by nicoletang in D:\workspace\spring-boot-non-web)
    2018-08-08 15:22:26.903  INFO 6948 --- [ main] com.th.SpringBootConsoleApplicati
    on      : No active profile set, falling back to default profiles: default
    2018-08-08 15:22:26.966  INFO 6948 --- [ main] s.c.a.AnnotationConfigApplication
    Context : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationCon
    text@2db0f6b2: startup date [Wed Aug 08 15:22:26 CST 2018]; root of context hierarchy
    2018-08-08 15:22:27.714  INFO 6948 --- [ main] o.s.j.e.a.AnnotationMBeanExporter
            : Registering beans for JMX exposure on startup
    2018-08-08 15:22:27.730  INFO 6948 --- [ main] com.th.SpringBootConsoleApplicati
    on      : Started SpringBootConsoleApplication in 1.373 seconds (JVM running for 1.934)
    Hello nicole
    2018-08-08 15:22:27.730  INFO 6948 --- [ Thread-2] s.c.a.AnnotationConfigApplication
    Context : Closing org.springframework.context.annotation.AnnotationConfigApplicationContex
    t@2db0f6b2: startup date [Wed Aug 08 15:22:26 CST 2018]; root of context hierarchy
    2018-08-08 15:22:27.730  INFO 6948 --- [ Thread-2] o.s.j.e.a.AnnotationMBeanExporter
            : Unregistering JMX-exposed beans on shutdown
    
    D:\workspace\spring-boot-non-web>java -jar target/spring-boot-non-web-0.0.1-SNAPSHOT.jar " 11"
    2018-08-08 15:23:25.264  INFO 10624 --- [ main] com.th.SpringBootConsoleApplicat
    ion      : Starting SpringBootConsoleApplication v0.0.1-SNAPSHOT on SZ10PD0703 with PID 10
    624 (D:\workspace\spring-boot-non-web\target\spring-boot-non-web-0.0.1-SNAPSHOT.jar starte
    d by nicoletang in D:\workspace\spring-boot-non-web)
    2018-08-08 15:23:25.264  INFO 10624 --- [ main] com.th.SpringBootConsoleApplicat
    ion      : No active profile set, falling back to default profiles: default
    2018-08-08 15:23:25.327  INFO 10624 --- [ main] s.c.a.AnnotationConfigApplicatio
    nContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationCo
    ntext@27ddd392: startup date [Wed Aug 08 15:23:25 CST 2018]; root of context hierarchy
    2018-08-08 15:23:26.169  INFO 10624 --- [ main] o.s.j.e.a.AnnotationMBeanExporte
    r        : Registering beans for JMX exposure on startup
    2018-08-08 15:23:26.185  INFO 10624 --- [ main] com.th.SpringBootConsoleApplicat
    ion      : Started SpringBootConsoleApplication in 1.451 seconds (JVM running for 1.999)
    Hello 11
    2018-08-08 15:23:26.185  INFO 10624 --- [ Thread-2] s.c.a.AnnotationConfigApplicatio
    nContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationConte
    xt@27ddd392: startup date [Wed Aug 08 15:23:25 CST 2018]; root of context hierarchy
    2018-08-08 15:23:26.185  INFO 10624 --- [ Thread-2] o.s.j.e.a.AnnotationMBeanExporte
    r        : Unregistering JMX-exposed beans on shutdown
    
    D:\workspace\spring-boot-non-web>mvn package
    [INFO] Scanning for projects...
    [INFO]
    [INFO] ------------------------------------------------------------------------
    [INFO] Building spring-boot-non-web 0.0.1-SNAPSHOT
    [INFO] ------------------------------------------------------------------------
    [INFO]
    [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ spring-boot-non-web
    ---
    [INFO] Using 'UTF-8' encoding to copy filtered resources.
    [INFO] Copying 1 resource
    [INFO] Copying 2 resources
    [INFO]
    [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ spring-boot-non-web ---
    [INFO] Nothing to compile - all classes are up to date
    [INFO]
    [INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ spring-boot-
    non-web ---
    [INFO] Using 'UTF-8' encoding to copy filtered resources.
    [INFO] skip non existing resourceDirectory D:\workspace\spring-boot-non-web\src\test\resou
    rces
    [INFO]
    [INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ spring-boot-non-w
    eb ---
    [INFO] Nothing to compile - all classes are up to date
    [INFO]
    [INFO] --- maven-surefire-plugin:2.18.1:test (default-test) @ spring-boot-non-web ---
    [INFO]
    [INFO] --- maven-jar-plugin:2.6:jar (default-jar) @ spring-boot-non-web ---
    [INFO] Building jar: D:\workspace\spring-boot-non-web\target\spring-boot-non-web-0.0.1-SNA
    PSHOT.jar
    [INFO]
    [INFO] --- spring-boot-maven-plugin:1.5.1.RELEASE:repackage (default) @ spring-boot-non-we
    b ---
    [INFO] ------------------------------------------------------------------------
    [INFO] BUILD SUCCESS
    [INFO] ------------------------------------------------------------------------
    [INFO] Total time: 3.957 s
    [INFO] Finished at: 2018-08-08T15:56:20+08:00
    [INFO] Final Memory: 18M/227M
    [INFO] ------------------------------------------------------------------------
    
    D:\workspace\spring-boot-non-web>java -jar target/spring-boot-non-web-0.0.1-SNAPSHOT.jar
    2018-08-08 15:56:26.211  INFO 9572 --- [ main] com.th.SpringBootConsoleApplicati
    on      : Starting SpringBootConsoleApplication v0.0.1-SNAPSHOT on SZ10PD0703 with PID 957
    2 (D:\workspace\spring-boot-non-web\target\spring-boot-non-web-0.0.1-SNAPSHOT.jar started
    by nicoletang in D:\workspace\spring-boot-non-web)
    2018-08-08 15:56:26.220  INFO 9572 --- [ main] com.th.SpringBootConsoleApplicati
    on      : No active profile set, falling back to default profiles: default
    2018-08-08 15:56:26.317  INFO 9572 --- [ main] s.c.a.AnnotationConfigApplication
    Context : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationCon
    text@22d8cfe0: startup date [Wed Aug 08 15:56:26 CST 2018]; root of context hierarchy
    2018-08-08 15:56:27.251  INFO 9572 --- [ main] o.s.j.e.a.AnnotationMBeanExporter
            : Registering beans for JMX exposure on startup
    Hello nicole
    2018-08-08 15:56:27.273  INFO 9572 --- [ Thread-2] s.c.a.AnnotationConfigApplication
    Context : Closing org.springframework.context.annotation.AnnotationConfigApplicationContex
    t@22d8cfe0: startup date [Wed Aug 08 15:56:26 CST 2018]; root of context hierarchy
    2018-08-08 15:56:27.274  INFO 9572 --- [ Thread-2] o.s.j.e.a.AnnotationMBeanExporter
            : Unregistering JMX-exposed beans on shutdown
    
    D:\workspace\spring-boot-non-web>java -jar target/spring-boot-non-web-0.0.1-SNAPSHOT.jar " Miss"
    2018-08-08 15:56:57.351  INFO 9828 --- [ main] com.th.SpringBootConsoleApplicati
    on      : Starting SpringBootConsoleApplication v0.0.1-SNAPSHOT on SZ10PD0703 with PID 982
    8 (D:\workspace\spring-boot-non-web\target\spring-boot-non-web-0.0.1-SNAPSHOT.jar started
    by nicoletang in D:\workspace\spring-boot-non-web)
    2018-08-08 15:56:57.361  INFO 9828 --- [ main] com.th.SpringBootConsoleApplicati
    on      : No active profile set, falling back to default profiles: default
    2018-08-08 15:56:57.459  INFO 9828 --- [ main] s.c.a.AnnotationConfigApplication
    Context : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationCon
    text@22d8cfe0: startup date [Wed Aug 08 15:56:57 CST 2018]; root of context hierarchy
    2018-08-08 15:56:58.409  INFO 9828 --- [ main] o.s.j.e.a.AnnotationMBeanExporter
            : Registering beans for JMX exposure on startup
    Hello Miss
    2018-08-08 15:56:58.431  INFO 9828 --- [ Thread-2] s.c.a.AnnotationConfigApplication
    Context : Closing org.springframework.context.annotation.AnnotationConfigApplicationContex
    t@22d8cfe0: startup date [Wed Aug 08 15:56:57 CST 2018]; root of context hierarchy
    2018-08-08 15:56:58.432  INFO 9828 --- [ Thread-2] o.s.j.e.a.AnnotationMBeanExporter
            : Unregistering JMX-exposed beans on shutdown
    
    D:\workspace\spring-boot-non-web>

**相关文章：**

*  [Spring Boot教程(一)][Spring Boot]
 *  [Spring Boot是什么？(二)][Spring Boot 1]
 *  [Spring Boot主要目标(三)][Spring Boot 2]
 *  [新项目为什么需要Spring Boot？(四)][Spring Boot 3]
 *  [Spring Boot核心和限制(五)][Spring Boot 4]
 *  [Spring Boot优点和缺点(六)][Spring Boot 5]
 *  [Spring Boot入门(七)][Spring Boot 6]
 *  [Spring Boot安装(八)][Spring Boot 7]
 *  [Spring Boot应用程序开发入门(九)][Spring Boot 8]
 *  [Spring Boot JSP应用实例(十)][Spring Boot JSP]
 *  [Spring Boot将WAR文件部署到Tomcat(十一)][Spring Boot_WAR_Tomcat]
 *  [Spring Boot Hello World(Thymeleaf)示例(十二)][Spring Boot Hello World_Thymeleaf]
 *  [Spring Boot @ConfigurationProperties实例(十四)][Spring Boot _ConfigurationProperties]
 *  [Spring Boot SLF4J日志实例(十五)][Spring Boot SLF4J]
 *  [Spring Boot Ajax实例(十六)][Spring Boot Ajax]

[Link 1]: https://www.yiibai.com/spring-boot/
[20180808161118873]: /images/20220516/569df54419c044358611a5171c114399.png
[Spring Boot]: https://blog.csdn.net/ththcc/article/details/81631532
[Spring Boot 1]: https://blog.csdn.net/ththcc/article/details/81632203
[Spring Boot 2]: https://blog.csdn.net/ththcc/article/details/81632326
[Spring Boot 3]: https://blog.csdn.net/ththcc/article/details/81632670
[Spring Boot 4]: https://blog.csdn.net/ththcc/article/details/81632792
[Spring Boot 5]: https://blog.csdn.net/ththcc/article/details/81632923
[Spring Boot 6]: https://blog.csdn.net/ththcc/article/details/81632964
[Spring Boot 7]: https://blog.csdn.net/ththcc/article/details/81633063
[Spring Boot 8]: https://blog.csdn.net/ththcc/article/details/81660779
[Spring Boot JSP]: https://blog.csdn.net/ththcc/article/details/81660830
[Spring Boot_WAR_Tomcat]: https://blog.csdn.net/ththcc/article/details/81660865
[Spring Boot Hello World_Thymeleaf]: https://blog.csdn.net/ththcc/article/details/81660896
[Spring Boot _ConfigurationProperties]: https://blog.csdn.net/ththcc/article/details/81661208
[Spring Boot SLF4J]: https://blog.csdn.net/ththcc/article/details/81661266
[Spring Boot Ajax]: https://blog.csdn.net/ththcc/article/details/81870702