MapStruct 和 Lombok 不能一起工作 [英] MapStruct and Lombok not working together
问题描述
正在使用的技术栈:
Java 8地图结构:1.2.0.Final龙目岛:1.16.18IDE:IntelliJ - Lombok 插件已经安装
Java 8 MapStruct : 1.2.0.Final Lombok: 1.16.18 IDE: IntelliJ - Lombok Plugin already installed
- 最初，当我删除 getter 和 setter 并添加
@Getter和@Setter注释时遇到问题，mapstruct无法找到属性并说:Unknown property "id" in result type com.vg.once.dto.OneDto.您的意思是空"吗? - 我开始知道 Lombok 1.16.14 或更高版本与 MapStruct 1.2.0.Beta1 或更高版本兼容并且可以一起工作，但我的版本比预期的要新，问题仍然出现.
- 我已经尝试过的另一种解决方案是运行 Lombok 的 Delombok 插件，但仍然出现了同样的问题.
- Initially, I faced issues when I removed getters and setters and added
@Getterand@Setterannotation,mapstructis not able to find the property and says:Unknown property "id" in result type com.vg.once.dto.OneDto. Did you mean "null"? - I came to know that Lombok 1.16.14 or newer along with MapStruct 1.2.0.Beta1 or newer are compatible and can work together, but my versions are newer then the desired still the issue is arising.
- One more solution that I have already tried is running Lombok's Delombok plugin, but still, the same issue is arising.
以下是项目文件:
实体对象:One.java:
import lombok.Getter;
import lombok.Setter;
@Getter
@Setter
public class One {
private int id;
private Integer version;
private int projectId;
private String title;
private String code;
private int sortOrder;
}
DTO 对象:OneDTO.java:
import lombok.Getter;
import lombok.Setter;
@Getter
@Setter
public class OneDto {
private int id;
private Integer version;
private int projectId;
private String title;
private String code;
private int sortOrder;
}
映射器类:OneMapper.java
import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import com.vg.once.dto.OneDto;
import com.vg.once.entity.One;
@Mapper
public interface OneMapper {
@Mapping(target="id", source="one.id")
OneDto createOne (One one);
}
pom.xml
<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>
<groupId>com.vg</groupId>
<artifactId>mapstruct</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Mapstruct-test</name>
<properties>
<java.version>1.8</java.version>
<org.mapstruct.version>1.2.0.Final</org.mapstruct.version>
<org.projectlombok.version>1.16.18</org.projectlombok.version>
</properties>
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${org.projectlombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-jdk8</artifactId>
<version>${org.mapstruct.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.projectlombok</groupId>
<artifactId>lombok-maven-plugin</artifactId>
<version>1.16.18.1</version>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>delombok</goal>
</goals>
</execution>
</executions>
<configuration>
<sourceDirectory>src/main/java</sourceDirectory>
<addOutputDirectory>false</addOutputDirectory>
<outputDirectory>${project.build.directory}/delombok</outputDirectory>
<encoding>UTF-8</encoding>
<skip>false</skip>
<verbose>false</verbose>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${org.mapstruct.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
</plugins>
</build>
</project>
构建跟踪:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Mapstruct-test 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- lombok-maven-plugin:1.16.18.1:delombok (default) @ mapstruct ---
[INFO] Delombok complete.
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ mapstruct ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.6.1:compile (default-compile) @ mapstruct ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 5 source files to /home/vivekgupta/Documents/workspaces/mapstruct-test/mapstruct/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /home/vivekgupta/Documents/workspaces/mapstruct-test/mapstruct/src/main/java/com/vg/once/mapper/OneMapper.java:[12,9] Unknown property "id" in result type com.vg.once.dto.OneDto. Did you mean "null"?
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.637 s
[INFO] Finished at: 2017-12-06T19:23:53+05:30
[INFO] Final Memory: 19M/235M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.6.1:compile (default-compile) on project mapstruct: Compilation failure
[ERROR] /home/vivekgupta/Documents/workspaces/mapstruct-test/mapstruct/src/main/java/com/vg/once/mapper/OneMapper.java:[12,9] Unknown property "id" in result type com.vg.once.dto.OneDto. Did you mean "null"?
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
请分享如何将 Lombok 和 MapStruct 一起使用?
please share how can i get this working using both Lombok and MapStruct together?
推荐答案
它不工作的原因是因为 Maven 只使用 MapStruct 处理器而不是 Lombok 处理器.annotationProcessorPaths 告诉 Maven 应该使用哪些处理器.
The reason why it does not work is because Maven only uses the MapStruct processor and not the Lombok one. The annotationProcessorPaths tells maven which processors it should use.
delombok 什么都不做，因为您最终每个类有 2 个文件，我认为 Maven 编译器看不到它们.
The delombok does nothing as you are ending up with 2 files per class and I think that the maven compiler does not see them.
您有两个选择:
选项一:在annotationProcessorPaths
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<annotationProcessorPaths>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${org.projectlombok.version}</version>
</path>
<!-- This is needed when using Lombok 1.18.16 and above -->
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok-mapstruct-binding</artifactId>
<version>0.2.0</version>
</path>
<!-- Mapstruct should follow the lombok path(s) -->
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${org.mapstruct.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
选项 2:
将 mapstruct-processor 依赖项添加到您的依赖项并删除 annotationProcessorPaths.这样，maven 编译器将选取您的依赖项中的所有注解处理器.
Add the mapstruct-processor dependency to your dependencies and remove the annotationProcessorPaths. This way the maven compiler will pick up all the annotation processors that are in your dependencies.
我建议使用选项 1，因为您可以确定您没有在代码中使用某些 MapStruct 传递依赖项和内部类.
I would advise in using Option 1, as with that you can be certain that you are not using some MapStruct transitive dependencies and internal classes in your code.
为了确保 IntelliJ 注释处理也能正常工作，由于 IDEA-150621.IntelliJ 目前不使用 Maven 的 annotationProcessorPaths 来正确配置项目.
To make sure that the IntelliJ annotation processing also works you will have to add the mapstruct-processor as a provided dependency due to IDEA-150621. IntelliJ in the moment does not use the annotationProcessorPaths from Maven to configure the project correctly.
编辑 2:
添加有关 Lombok 1.18.16 所需的 lombok-mapstruct-binding 的信息和注释.
Add information and comment about lombok-mapstruct-binding needed from Lombok 1.18.16.
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