MapStruct和Lombok没有合作

时间:2017-12-06 14:14:04

标签: intellij-idea java-8 lombok mapstruct intellij-lombok-plugin

正在使用Tech Stack:

Java 8 MapStruct:1.2.0.Final 龙目岛:1.16.18 IDE:已安装IntelliJ - Lombok插件

  • 最初,当我删除了getter和setter并添加了@Getter@Setter注释时,我遇到了问题,mapstruct无法找到该属性并说:Unknown property "id" in result type com.vg.once.dto.OneDto. Did you mean "null"? < / LI>
  • 我开始知道Lombok 1.16.14或者更新版本与MapStruct 1.2.0.Beta1或更新版本是兼容的并且可以一起工作,但是我的版本更新,然后仍然会出现问题。
  • 我已经尝试过的另一个解决方案是运行Lombok的Delombok插件,但仍然会出现同样的问题。

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;

}

Mapper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);

}

的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

请分享如何使用Lombok和MapStruct一起使用?

10 个答案:

答案 0 :(得分:34)

它不起作用的原因是因为Maven只使用MapStruct处理器而不使用Lombok处理器。 annotationProcessorPaths告诉maven它应该使用哪些处理器。

delombok什么都不做,因为你最后每个类有2个文件,我认为maven编译器看不到它们。

您有两个选择:

选项1:在anootationProcessorPaths

中添加lombok依赖项
<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>${org.mapstruct.version}</version>
            </path>
            <path>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${org.projectlombok.version}</version>
            </path>
        </annotationProcessorPaths>
    </configuration>
</plugin>

选项2:

mapstruct-processor依赖项添加到依赖项中,然后删除annotationProcessorPaths。这样,maven编译器将获取依赖项中的所有注释处理器。

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。

编辑:

为确保IntelliJ注释处理也有效,您必须将mapstruct-processor添加为由IDEA-150621引起的provided依赖关系。 IntelliJ目前不使用Maven的annotationProcessorPaths来正确配置项目。

答案 1 :(得分:9)

以防万一有人在寻找如何使用Gradle进行配置的方法:

dependencies {

   // Lombok
   compileOnly 'org.projectlombok:lombok:1.18.2'
   annotationProcessor 'org.projectlombok:lombok:1.18.2'

   // MapStruct
   compileOnly 'org.mapstruct:mapstruct-jdk8:1.2.0.Final'
   annotationProcessor 'org.mapstruct:mapstruct-processor:1.2.0.Final'

}

答案 2 :(得分:2)

在我的 Spring Boot Maven 项目中多次尝试后,以下终于奏效了:

pom.xml 的配置:

  1. 属性部分:
    <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <maven.compiler.target>11</maven.compiler.target>
            <maven.compiler.source>11</maven.compiler.source>
            <version.lombok>1.18.18</version.lombok>
            <version.mapstruct>1.4.2.Final</version.mapstruct>
            <version.mapstruct-lombok>0.2.0</version.mapstruct-lombok>
        </properties>
  1. 依赖项部分:
    <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${version.lombok}</version>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.mapstruct</groupId>
            <artifactId>mapstruct</artifactId>
            <version>${version.mapstruct}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok-mapstruct-binding</artifactId>
            <version>${version.mapstruct-lombok}</version>
        </dependency>
  1. 构建插件部分:
    <build>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.5.1</version>
                    <configuration>
                        <source>9</source>
                        <target>9</target>
                        <annotationProcessorPaths>
                            <path>
                                <groupId>org.mapstruct</groupId>
                                <artifactId>mapstruct-processor</artifactId>
                                <version>${version.mapstruct}</version>
                            </path>
                            <path>
                                <groupId>org.projectlombok</groupId>
                                <artifactId>lombok</artifactId>
                                <version>${version.lombok}</version>
                            </path>
                            <path>
                                <groupId>org.projectlombok</groupId>
                                <artifactId>lombok-mapstruct-binding</artifactId>
                                <version>${version.mapstruct-lombok}</version>
                            </path>
                        </annotationProcessorPaths>
                    </configuration>
                </plugin>
            </plugins>
        </build>

希望这有帮助,我之前的映射器没有映射字段值,但现在这些是源和目标之间的映射器 + 每个元素的嵌套列表也与字段值一起映射。

答案 3 :(得分:2)

如果有人在使用最新的 Lombok 和 Mapstruct 库版本时阅读本文:-

如果您使用的是 Lombok 1.18.16 或更新版本,那么您还需要添加 lombok-mapstruct-binding 以使 Lombok 和 MapStruct 协同工作。

https://mapstruct.org/faq/#Can-I-use-MapStruct-together-with-Project-Lombok

答案 4 :(得分:1)

如果仍然有人在寻找这个答案,那么我遇到了JOOQ + MapStruct Integration的类似问题。答案是路径的顺序重要

  • IntellijIdea 2020.2.3
  • Java 8
  • Spring Framework 2.4.0

我的构建片段

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>${maven.compiler.plugin.version}</version>
            <configuration>
                <source>${java.version}</source>
                <target>${java.version}</target>
                <annotationProcessorPaths>
                    <path>
                        <groupId>org.projectlombok</groupId>
                        <artifactId>lombok</artifactId>
                        <version>${org.lombok.version}</version>
                    </path>
                    <path>
                        <groupId>org.mapstruct</groupId>
                        <artifactId>mapstruct-processor</artifactId>
                        <version>${mapstruct.version}</version>
                    </path>
                    <!-- This is needed when using Lombok 1.8.16 and above -->
                    <path>
                        <groupId>org.projectlombok</groupId>
                        <artifactId>lombok-mapstruct-binding</artifactId>
                        <version>${org.lombok-mapstruct-binding.version}</version>
                    </path>
                </annotationProcessorPaths>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>${spring.boot.version}</version>
        </plugin>
    </plugins>
</build>

答案 5 :(得分:1)

对于将 Intellij 升级到 2020.3 版本后的问题,以下解决方案对我有用。 使用 lombok 版本:1.18.16,lombok-mapstruct-binding:0.2.0

<dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.16</version>
            <scope>provided</scope>
</dependency>
<dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok-mapstruct-binding</artifactId>
            <version>0.2.0</version>
</dependency>

在插件的注解处理部分更改lombok和mapstruct插件路径的顺序:

<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>11</source>
                    <target>11</target>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                            <version>${org.projectlombok.version}</version>
                        </path>
                        <path>
                            <groupId>org.mapstruct</groupId>
                            <artifactId>mapstruct-processor</artifactId>
                            <version>${org.mapstruct.version}</version>
                        </path>

                    </annotationProcessorPaths>
                </configuration>
            </plugin>
        </plugins>

答案 6 :(得分:0)

我有类似的问题。原来我的MapStruct版本已经过时了!

我使用的是MapStruct版本1.1.0.Final,但是 Lombok支持至少1.2.0.Final是必需的

答案 7 :(得分:0)

对我来说,解决方案非常简单。

处理器的顺序很重要。

在我的情况下,mapstruct处理器在lombok处理器之前定义。如果顺序不好,则mapstruct不会生成映射,只需创建结果类的实例(我在生成的实现中看到了该实例)。

我的插件配置正确无误:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>${maven.compiler.plugin.version}</version>
    <configuration>
        <source>15</source>
        <target>15</target>
        <compilerArgs>--enable-preview</compilerArgs>
        <annotationProcessorPaths>
            <path>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
            </path>
            <path>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct-processor</artifactId>
                <version>${mapstruct.version}</version>
            </path>
        </annotationProcessorPaths>
    </configuration>
</plugin>

当然,您需要添加依赖项:

<dependencies>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.mapstruct</groupId>
        <artifactId>mapstruct</artifactId>
        <version>${mapstruct.version}</version>
    </dependency>
</dependencies>

答案 8 :(得分:0)

我同意该命令在使用gradle时也会发挥作用。就我而言,在多模块设置中将subprojects { ... dependencyManagement{}}添加到父build.gradle时,它失败了。

答案 9 :(得分:0)

mapstruct只是返回一个空实例。最近,我将Intellij版本升级到2020.3,并启动了Spring Boot 2.4.0,并进入了这种情况。

当我将Spring版本更改为2.3.o.RELEASE时,我看到编译后是mapstruct正在正确构建映射。

仔细阅读mapstruct最近更新的帖子..,但这需要时间.. :)所以,就目前而言,我从maven转到Gradle项目,并且一切正常。.听起来很奇怪,但确实如此... < / p>

如果有人能发表正确的问题和解决方案,我将不胜感激。