有一个项目，kotlin写了一些逻辑代码，我想加一个controller，新增了一个kotlin方法复用了之前的逻辑，写好之后没有重新编译，直接启动进行测试，整体完全正常没有报错，但是在mvn clean,然后再mvn compile的时候发生了报错，报的是找不到符号，有两个地方，一个是import语句中的kotlin类名，一个是@Resource注入(kotlin类加了@Component注解，交给spring管理了)时候的类名找不到符号。但是IDEA没有标红，点击也可以正常跳转到KOTLIN类文件内，就很奇怪，网上找了不少方法，说是需要先编译kotlin再编译java就能解决，于是修改了pom文件，改成如下顺序，并且需要加上才可以

<build><finalName>${project.artifactId}</finalName><plugins><plugin><groupId>org.jetbrains.kotlin</groupId><artifactId>kotlin-maven-plugin</artifactId><version>1.9.22</version><configuration><jvmTarget>1.8</jvmTarget><compilerPlugins><plugin>lombok</plugin></compilerPlugins><pluginOptions><option>lombok:config=${project.basedir}/lombok.config</option></pluginOptions></configuration><dependencies><dependency><groupId>org.jetbrains.kotlin</groupId><artifactId>kotlin-maven-lombok</artifactId><version>1.9.22</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.22</version><scope>compile</scope></dependency></dependencies><executions><execution><id>compile</id><phase>compile</phase><goals><goal>compile</goal></goals></execution><execution><id>test-compile</id><phase>test-compile</phase><goals><goal>test-compile</goal></goals></execution></executions></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.8.1</version><configuration><source>1.8</source><target>1.8</target></configuration></plugin><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-deploy-plugin</artifactId><configuration><skip>true</skip></configuration></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-install-plugin</artifactId><configuration><skip>true</skip></configuration></plugin></plugins></build>

但是编译后看控制台输出：

[INFO] 
[INFO] --- maven-enforcer-plugin:1.4.1:enforce (default-cli) @ ---
[INFO] 
[INFO] --- maven-enforcer-plugin:1.4.1:enforce (banDuplicateClasses-Check) @  ---
[INFO] 
[INFO] --- maven-enforcer-plugin:1.4.1:enforce (check-commons-db-upgrade) @  ---
[INFO] 
[INFO] --- jacoco-maven-plugin:0.7.1.201405082137:prepare-agent (pre-unit-test) @  ---
[INFO] argLine set to -javaagent:/***/org.jacoco.agent-0.7.1.201405082137-runtime.jar=destfile=/***/target/jacoco.exec,excludes=org/sqlite/SQLite
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @  ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 6 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @  ---

仍旧是先编译的java，再次查询资料，修改pom文件如下：

<build><finalName>${project.artifactId}</finalName><plugins><plugin><groupId>org.jetbrains.kotlin</groupId><artifactId>kotlin-maven-plugin</artifactId><version>1.9.22</version><configuration><jvmTarget>1.8</jvmTarget><compilerPlugins><plugin>lombok</plugin></compilerPlugins><pluginOptions><option>lombok:config=${project.basedir}/lombok.config</option></pluginOptions></configuration><dependencies><dependency><groupId>org.jetbrains.kotlin</groupId><artifactId>kotlin-maven-lombok</artifactId><version>1.9.22</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.22</version><scope>compile</scope></dependency></dependencies><executions><execution><id>compile</id><phase>process-sources</phase><goals><goal>compile</goal></goals></execution><execution><id>test-compile</id><phase>process-test-sources</phase><goals><goal>test-compile</goal></goals></execution></executions></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.8.1</version><configuration><source>1.8</source><target>1.8</target></configuration></plugin><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-deploy-plugin</artifactId><configuration><skip>true</skip></configuration></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-install-plugin</artifactId><configuration><skip>true</skip></configuration></plugin></plugins></build>

注意看这两处区别：

<phase>process-sources</phase>
<phase>process-test-sources</phase>

修改后编译就发现kotlin在前边先编译，没有报错了，解决问题！