[英]MapStruct is not generating implementation classes
我在 maven 和 IDEA 中使用 Mapstruct 和 Lombok,它拒绝生成映射器实现。 配置:
<?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>
...
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
<java.version>11</java.version>
<org.mapstruct.version>1.3.0.Beta2</org.mapstruct.version>
<lombok.version>1.18.2</lombok.version>
</properties>
<dependencies>
<!-- spring deps -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
...
<!-- lombok dep -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct</artifactId>
<version>${org.mapstruct.version}</version>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<executions>
<execution>
<id>add-source</id>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>${project.build.directory}/generated-sources/java/</source>
<source>${project.build.directory}/generated-sources/annotations/</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<release>11</release>
<annotationProcessorPaths>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</path>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${org.mapstruct.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
<configuration>
<archive>
<manifestEntries>
<Implementation-Version>${project.version}</Implementation-Version>
</manifestEntries>
</archive>
</configuration>
</plugin>
</plugins>
</build>
...
</project>
Mapstruct 和 Lombok 都注册为具有想法的注释处理器:
当我尝试使用 IDEA 构建或尝试 maven 全新安装时,不会生成实现文件。
我尝试将 Java 从 11 更改为 8,但它仍然不起作用。 /target/generated-sources/annotations 只是空的。 其他具有相同配置的项目运行良好。
问题是我的映射器缺少注释@Mapper
。
添加mapstruct-processor
依赖项为我解决了这个问题。
如果使用 kotlin,则需要使用kapt
而不是annotationProcessor
摇篮示例:
plugins {
kotlin("kapt") version "1.4.32"
}
...
dependencies {
...
implementation("org.mapstruct:mapstruct:1.4.2.Final")
kapt("org.mapstruct:mapstruct-processor:1.4.2.Final")
}
之后如果你执行gradle build
就会生成实现
我遇到过这个问题。 在我的情况下得到这个错误:
Java:由于错误元素存在问题,没有为 Mapper 创建实现
当应用程序运行时。
当我将版本降低到2.2.6.RELEASE
它开始工作时,我曾经使用 spring 启动版本2.4.3
对我来说,问题是:
<useIncrementalCompilation>false</useIncrementalCompilation>
评论出来后,一切正常!
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>${jdk.target.version}</source>
<target>${jdk.target.version}</target>
<!--<useIncrementalCompilation>false</useIncrementalCompilation>-->
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${org.mapstruct.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
如果您在 maven 中使用 Kotlin,则可以添加以下依赖项:
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct</artifactId>
<version>1.4.2.Final</version>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>1.4.2.Final</version>
</dependency>
并将 kapt 执行添加到 kotlin-maven-plugin 中,如下所示:
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>1.5.0</version>
<executions>
<execution>
<id>kapt</id>
<goals>
<goal>kapt</goal>
</goals>
<configuration>
<sourceDirs>
<sourceDir>src/main/kotlin</sourceDir>
<sourceDir>src/main/java</sourceDir>
</sourceDirs>
<annotationProcessorPaths>
<!-- Specify your annotation processors here. -->
<annotationProcessorPath>
<groupId>com.google.dagger</groupId>
<artifactId>dagger-compiler</artifactId>
<version>2.9</version>
</annotationProcessorPath>
</annotationProcessorPaths>
</configuration>
</execution>
<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>
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