利用Spring CLI开发并打包java程序

Posted 2021-01-10 sakerliu

1.安装java，假如没有安装，参考https://www.cnblogs.com/SakerLiu/p/9742259.html

2.安装maven

sudo apt-get install maven

3.安装Spring CLI，从https://repo.spring.io/milestone/org/springframework/boot/spring-boot-cli/下载想要的版本

将解压完成的后的文件重命名为spring，并移动到/usr/local/下，添加到PATH

export SPRING_HOME=/usr/local/spring
export PATH=${SPRING_HOME}/bin:$PATH

输入spring  --version验证，输出如下内容

Spring CLI v2.1.0.M3

4.测试Spring CLI

创建test.groovy，内容如下

@RestController
class ThisWillActuallyRun {
@RequestMapping("/")
String home() {
"Hello World!"
}
}

执行下述代码

spring run test.groovy

访问localhost:8080即可发现hello world的输出

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创建一个Spring boot 应用

1.创建一个父pom.xml文件，方便以后开发直接继承

<?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>myproject</artifactId>
<version>0.0.1-SNAPSHOT</version>
<!-- Inherit defaults from Spring Boot -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.M3</version>
</parent>
<!-- Add typical dependencies for a web application -->
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<!-- Package as an executable jar -->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<!-- Add Spring repositories -->
<!-- (you don‘t need this if you are using a .RELEASE version) -->
<repositories>
<repository>
<id>spring-snapshots</id>
<url>https://repo.spring.io/snapshot</url>
<snapshots><enabled>true</enabled></snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies> 
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<url>https://repo.spring.io/snapshot</url>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<url>https://repo.spring.io/milestone</url>
</pluginRepository>
</pluginRepositories>
</project>

2.输入下面代码，解决依赖

 mvn dependency:tree

3.在pom.xml文件目录下，输入下面的指令创建文件夹

mdkri -p src/main/java

在java文件夹下创建Example.java文件，内容如下

import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.web.bind.annotation.*;
@RestController
@EnableAutoConfiguration
public class Example {
@RequestMapping("/")
String home() {
return "Hello World!";
}
public static void main(String[] args) throws Exception {
SpringApplication.run(Example.class, args);
}
}

4.执行mvn spring-boot:run并打开localhost:8080，输出hello world！

5.添加如下依赖，创建jar文件

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

6.执行mvn package，解决包依赖

7.在target文件夹下，存在一个myproject-0.0.1-SNAPSHOT.jar 文件，执行

java -jar target/myproject-0.0.1-SNAPSHOT.jar

便可以和上述一样访问网页

假如想查看里面的东西，执行下面的命令

jar tvf target/myproject-0.0.1-SNAPSHOT.jar

就会发现出现一个压缩文件myproject-0.0.1-SNAPSHOT.jar.original，打开查看即可