Spring Boot非web应用程序实例(十三)

其他 2018-08-20 16:14:01 阅读次数: 0

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

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


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>
            <!-- Package as an executable jar/war -->
            <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-

扫描二维码关注公众号，回复： 2879582 查看本文章 
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>




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