SpringBoot4.0合 Scala/Java 混编？我踩过的坑，请你绕行
本节说明一下Scala和Java混合开发时，本地运行没问题，只要上线部署打成Jar包就会找不到启动类，启动时就会报错
1. 需要配置两个东西
1. Scala的依赖 2. Scala的打包插件2. Scala打包部署
<dependency><groupId>org.scala-lang</groupId><artifactId>scala-library</artifactId><version>2.13.6</version><!-- 使用适合你项目的版本 --></dependency>3. Scala打包插件
<!-- Scala Compiler --><plugin><groupId>net.alchim31.maven</groupId><artifactId>scala-maven-plugin</artifactId><version>4.4.1</version><executions><execution><goals><goal>compile</goal><goal>testCompile</goal></goals></execution></executions><configuration><scalaVersion>2.13.16</scalaVersion></configuration></plugin>4. Scala打包效果
5. 完整Pom依赖
<?xml version="1.0" encoding="UTF-8"?><projectxmlns="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.cloud.xx</groupId><artifactId>xx-cloud</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><mybatis-plus.version>3.4.3</mybatis-plus.version><mysql.connector.version>8.0.16</mysql.connector.version><hutool-all.version>5.8.18</hutool-all.version></properties><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>4.0.1-SNAPSHOT</version></parent><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--knife4j 在线接口文档--><dependency><groupId>com.github.xiaoymin</groupId><artifactId>knife4j-openapi3-jakarta-spring-boot-starter</artifactId><version>4.5.0</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version><scope>provided</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-validation</artifactId></dependency><dependency><groupId>com.dtflys.forest</groupId><artifactId>forest-spring-boot3-starter</artifactId><version>1.5.35</version></dependency><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>${hutool-all.version}</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-spring-boot4-starter</artifactId><version>3.5.14</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.connector.version}</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.79</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.22</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!-- 或者使用PostgreSQL兼容驱动 --><!-- https://mvnrepository.com/artifact/org.postgresql/postgresql --><dependency><groupId>org.postgresql</groupId><artifactId>postgresql</artifactId><version>42.7.8</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><scope>provided</scope></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><scope>test</scope></dependency><dependency><groupId>org.scala-lang</groupId><artifactId>scala-library</artifactId><version>2.13.6</version><!-- 使用适合你项目的版本 --></dependency></dependencies><build><finalName>xx-cloud</finalName><plugins><!-- Scala Compiler --><plugin><groupId>net.alchim31.maven</groupId><artifactId>scala-maven-plugin</artifactId><version>4.4.1</version><executions><execution><goals><goal>compile</goal><goal>testCompile</goal></goals></execution></executions><configuration><scalaVersion>2.13.16</scalaVersion></configuration></plugin><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><mainClass>com.cloud.xx.ApplicationBoot</mainClass><includeSystemScope>true</includeSystemScope></configuration></plugin></plugins></build><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><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>6. 往/期/回/顾
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