1、eclipse 新建專案helloworld 

新建 Spring Starter Project，然後選擇web專案，配置相關引數新增程式碼：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@SpringBootApplication
public class MqProducerApplication {

	public static void main(String[] args) {
		SpringApplication.run(MqProducerApplication.class, args);
	}
	
	@RequestMapping("/")
	public String hello() {
		return "Hello world!";
	}
}
 

2、預設埠：

在src/resource下增加檔案application.properties

加入server.port=8081

3、maven 依賴和程式分開打包：

註釋掉原有的一併打包方式：

<?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>

	<groupId>com.example</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>demo</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.3.RELEASE</version>
		<relativePath/>
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

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

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

		<dependency>
			<groupId>org.apache.maven.plugins</groupId>
			<artifactId>maven-resources-plugin</artifactId>
			<version>2.4.3</version>
		</dependency>
	
		<dependency>
			<groupId>org.apache.maven.plugins</groupId>
			<artifactId>maven-jar-plugin</artifactId>
			<version>3.1.0</version>
		</dependency>
		
	</dependencies>

	<build>
		<plugins>
			<!-- <plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>				
			</plugin> -->
			
			<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <classesDirectory>target/classes/</classesDirectory>
                    <archive>
                        <manifest>
                            <mainClass>com.example.demo.DemoApplication</mainClass>
                            <!-- 打包時 MANIFEST.MF檔案不記錄的時間戳版本 -->
                            <useUniqueVersions>false</useUniqueVersions>
                            <addClasspath>true</addClasspath>
                            <classpathPrefix>lib/</classpathPrefix>
                        </manifest>
                        <manifestEntries>
                            <Class-Path>.</Class-Path>
                        </manifestEntries>
                    </archive>
                </configuration>
            </plugin>

	        <plugin>
	            <groupId>org.apache.maven.plugins</groupId>
	            <artifactId>maven-dependency-plugin</artifactId>
	            <executions>
	                <execution>
	                    <id>copy-dependencies</id>
	                    <phase>prepare-package</phase>
	                    <goals>
	                        <goal>copy-dependencies</goal>
	                    </goals>
	                    <configuration>
	                        <outputDirectory>${project.build.directory}/lib</outputDirectory>
	                        <overWriteReleases>false</overWriteReleases>
	                        <overWriteSnapshots>false</overWriteSnapshots>
	                        <overWriteIfNewer>true</overWriteIfNewer>
	                    </configuration>
	                </execution>
	            </executions>
	        </plugin>
	        
		</plugins>
	</build>


</project>
 

執行指令碼：java -Dloader.path="lib/" -jar demo-0.0.1-SNAPSHOT.jar

一定要記得修改mainClass