Mapstruct 1.2.0在springboot不产生映射类2.0.0.M3 +龙目岛

我试图把一个样本项目结合了以下技术：Mapstruct 1.2.0在springboot不产生映射类2.0.0.M3 +龙目岛

春天开机（2.0.0.M3）
Mapstruct（1.2.0.CR1）
龙目（18年1月16日）

我已经定义此映射器：

@Mapper(componentModel = "spring") 
public interface SourceToTargetMapper { 

    SourceToTargetMapper MAPPER = Mappers.getMapper(SourceToTargetMapper.class); 

    @Mappings({ 
     @Mapping(source = "characteristics", target = "description"), 
     @Mapping(source = "identifier", target = "id") 
    }) 
    public Target toTarget(Source source); 
}

我遇到的问题是没有生成实现SourceToTargetMapper接口的类。

这就是我得到的痕迹，当我运行单元测试：

2017-09-04 00:13:24.726 ERROR 1712 --- [   main] o.s.test.context.TestContextManager  : Caught exception while allowing TestExecutionListener [org.springframework.boot.test.a[email protected]568bf312] to prepare test instance [[email protected]] 

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'io.alfredux.demo.MapperTest': Unsatisfied dependency expressed through field 'sourceToTargetMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'io.alfredux.demo.mapper.SourceToTargetMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:570) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:356) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:399) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:118) ~[spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) ~[spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener.prepareTestInstance(SpringBootDependencyInjectionTestExecutionListener.java:44) ~[spring-boot-test-autoconfigure-2.0.0.M3.jar:2.0.0.M3] 
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:242) ~[spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227) [spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) [spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12] 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) [spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246) [spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) [spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12] 
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12] 
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12] 
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12] 
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12] 
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12] 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) [spring-test-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) [.cp/:na] 
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) [.cp/:na] 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) [.cp/:na] 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678) [.cp/:na] 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) [.cp/:na] 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) [.cp/:na] 
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'io.alfredux.demo.mapper.SourceToTargetMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1486) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1097) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1058) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3] 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:567) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3] 
    ... 29 common frames omitted

我相信有一些人失踪或在我的pom.xml的文件编译/插件部分错位的

<build> 
    <plugins> 
     <plugin> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-maven-plugin</artifactId> 
      <configuration> 
       <source>${java.version}</source> 
       <target>${java.version}</target> 
       <annotationProcessorPaths> 
        <path> 
         <groupId>org.mapstruct</groupId> 
         <artifactId>mapstruct-processor</artifactId> 
         <version>${org.mapstruct.version}</version> 
        </path> 
       </annotationProcessorPaths> 
      </configuration> 
     </plugin> 
    </plugins> 
</build>

该项目的源代码可以在这里检查：

https://github.com/Alfredux79/mapstruct-lombock-springboot/tree/stack-overflow-question

问题可以被复制下载的分支，运行以下命令：

mvn test

谢谢！

来源

2017-09-03 Alfredo

您尚未正确配置您的编译器。在运行mvn clean compile后，您应该会看到一些由MapStruct在target/generated-sources下生成的文件。

你缺少Maven的编译器插件配置：

<plugin> 
    <groupId>org.apache.maven.plugins</groupId> 
    <artifactId>maven-compiler-plugin</artifactId> 
    <version>3.6.2</version> 
    <configuration> 
     <source>1.7</source> 
     <target>1.7</target> 
     <annotationProcessorPaths> 
      <path> 
       <groupId>org.mapstruct</groupId> 
       <artifactId>mapstruct-processor</artifactId> 
       <version>${org.mapstruct.version}</version> 
      </path> 
     </annotationProcessorPaths> 
    </configuration> 
</plugin>

见this example。

来源

2017-09-03 22:54:31 user3151902

如果我使用3.1版本的项目编译，但不会生成映射器类如果我使用的版本高于3.5，maven无法检测到lombok生成的方法 – Alfredo

它与3.5而不是3.1一起工作的原因是因为' annotationProcessorPaths'从3.5开始支持。如果设置了'annotationProcessorPaths'而Maven Compiler只使用在那里定义的处理器。因此，Lombok处理器没有被调用，这导致它不启用MapStruct使用的标志，以便知道类型是否完整并准备好处理 – Filip

这是我的pom.xml构建部分的最终版本的样子：

<build> 
    <plugins> 
     <plugin> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-maven-plugin</artifactId> 
     </plugin> 
     <plugin> 
      <groupId>org.apache.maven.plugins</groupId> 
      <artifactId>maven-compiler-plugin</artifactId> 
      <version>3.5.1</version> 
      <configuration> 
       <source>${java.version}</source> 
       <target>${java.version}</target> 
       <annotationProcessorPaths> 
        <path> 
         <groupId>org.mapstruct</groupId> 
         <artifactId>mapstruct-processor</artifactId> 
         <version>${org.mapstruct.version}</version> 
        </path> 
        <path> 
         <groupId>org.projectlombok</groupId> 
         <artifactId>lombok</artifactId> 
         <version>${lombok.version}</version> 
        </path> 
       </annotationProcessorPaths> 
      </configuration> 
     </plugin> 
    </plugins> 
</build>

而且这种变化正在生成的类。

该解决方案是提供的答案和为lombock添加注释处理器的混合。

来源

2017-09-04 00:14:57 Alfredo

为了确切知道为什么需要这样做，并且正在查看我的评论[这里]（https：// stackoverflow。COM /问题/ 46028450/mapstruct-1-2-0-不产生映射器级合springboot-2-0-0-M3 Lombok的＃comment79044312_46028494） – Filip

Mapstruct 1.2.0在springboot不产生映射类2.0.0.M3 +龙目岛

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