idea中使用spring boot + scala快速开发部署

本是古典何须时尚 2022-09-11 06:19 15阅读 0赞

# 准备 #

1. idea、maven、jdk都已安装配置好，都是常规开发用到的工具

2. scala已经下载本地并安装，下载地址：[Download | The Scala Programming Language][Download _ The Scala Programming Language]

3. idea安装scala插件

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_20_color_FFFFFF_t_70_g_se_x_16][]

# Spring boot 项目构建 #

## 构建 ##

# [https://start.spring.io/![icon-default.png_t_L892][]https://start.spring.io/][https_start.spring.io_icon-default.png_t_L892_https_start.spring.io] #

点击上面的链接快速构建一个spring boot工程：

## ![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_20_color_FFFFFF_t_70_g_se_x_16 1][] ##

## 导入idea ##

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_20_color_FFFFFF_t_70_g_se_x_16 2][]

# Scala集成开发配置 #

## 配置scala库 ##

1.点击图中+号

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_20_color_FFFFFF_t_70_g_se_x_16 3][]

2.选择Scala SDK

![20210913195843588.png][]

3.选择本地下载的

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_16_color_FFFFFF_t_70_g_se_x_16][]

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_20_color_FFFFFF_t_70_g_se_x_16 4][]

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_13_color_FFFFFF_t_70_g_se_x_16][]

## ![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_20_color_FFFFFF_t_70_g_se_x_16 5][]设置源码目录 ##

1.创建目录：src/main/scala

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_10_color_FFFFFF_t_70_g_se_x_16][]

2.设置源码包

maven约定源码包是src/main/java，所以要再增加一个：src/main/scala

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_20_color_FFFFFF_t_70_g_se_x_16 6][]

# 代码示例 #

开发环境已经配置完成了，写个代码验证一下：

1.scala目录下创建一个demo包

![20210913200619626.png][]

2.增加一个Welcome类，返回一个欢迎语，在demo包右键New 选择Scala Class

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_11_color_FFFFFF_t_70_g_se_x_16][]

class Welcome {
    
        /**
         * Define a function that return "hello, world" when be called.
         */
        def hello : String = "Hello, World!"
    }

3.修改启动类，当项目启动，打印这个欢迎语

# ![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_20_color_FFFFFF_t_70_g_se_x_16 7][]打包 #

直接打包是不行的，原因：1.scala环境的依赖缺少，2.需要编译scala

1.pom.xml添加依赖和插件

<dependencies>
    		<dependency>
    			<groupId>org.scala-lang</groupId>
    			<artifactId>scala-library</artifactId>
    			<version>2.13.6</version>
    		</dependency>
    		<dependency>
    			<groupId>org.scala-lang</groupId>
    			<artifactId>scala-compiler</artifactId>
    			<version>2.13.6</version>
    		</dependency>
    	</dependencies>
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.scala-tools</groupId>
    				<artifactId>maven-scala-plugin</artifactId>
    				<version>2.15.2</version>
    				<executions>
    					<execution>
    						<id>scala-compile-first</id>
    						<goals>
    							<goal>compile</goal>
    						</goals>
    						<configuration>
    							<includes>
    								<include>**/*.scala</include>
    							</includes>
    						</configuration>
    					</execution>
    				</executions>
    			</plugin>
    		</plugins>
    	</build>

2.打包

mvn clean scala:compile compile package

3.运行

java -jar target/spring-boot-scala-demo-0.0.1-SNAPSHOT.jar

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATmV0V2hpdGU_size_20_color_FFFFFF_t_70_g_se_x_16 8][]

和常规的spring boot项目一样启动即可。

[Download _ The Scala Programming Language]: https://www.scala-lang.org/download/
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[icon-default.png_t_L892]: /images/20220828/0ae9343fd333420d8881cf2db8c0adca.png
[https_start.spring.io_icon-default.png_t_L892_https_start.spring.io]: https://start.spring.io/
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