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;
@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 -

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.felix</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.felix.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=felix

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.felix;

import com.yiibai.service.HelloMessageService;

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 static java.lang.System.exit;

@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 -

## Go to project directory
## package it
$ mvn package
$ java -jar target/spring-boot-non-web-0.0.1-SNAPSHOT.jar
Hello felix
$ java -jar target/spring-boot-non-web-0.0.1-SNAPSHOT.jar "Max su"
Hello Max su