Lombok 没有在 Maven 中编译

Question

我正在尝试通过 Maven 编译使用 lombok 的项目，但出现以下问题：

 [INFO] ------------------------------------------------------------------------
[INFO] Building akka-calculator-lib 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ akka-calculator-lib ---
[INFO] Deleting C:\dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ akka-calculator-lib ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 2 resources
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ akka-calculator-lib ---
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
[INFO] Compiling 11 source files to C:\dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\operation\multiply\MultiplyResult.java:[13,22] error: variable firstNumber not initialized in the default constructor
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\operation\multiply\MultiplyResult.java:[14,22] error: variable secondNumber not initialized in the default constructor
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\operation\multiply\MultiplyResult.java:[15,22] error: variable result not initialized in the default constructor
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[35,52] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[35,87] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[36,54] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[37,74] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[38,74] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[38,101] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[43,50] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[43,85] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[44,64] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[45,84] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[46,84] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[46,111] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[51,50] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[51,85] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[52,64] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[53,84] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[54,84] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[54,111] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[59,50] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[59,85] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[60,60] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[61,80] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[62,89] error: cannot find symbol
[ERROR] \dev\projects\Akka\akka-testing\akka-calculator\akka-calculator-lib\src\main\java\com\mangusbrother\akka\calculator\lib\CalculatorActor.java:[62,127] error: cannot find symbol
[INFO] 27 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] akka-parent ........................................ SUCCESS [  0.164 s]
[INFO] akka-testing ....................................... SUCCESS [  0.011 s]
[INFO] akka-calculator .................................... SUCCESS [  0.010 s]
[INFO] akka-calculator-lib ................................ FAILURE [  2.758 s]
[INFO] akka-calculator-creation ........................... SKIPPED
[INFO] akka-calculator-lookup ............................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.120 s
[INFO] Finished at: 2016-02-14T19:01:21+01:00
[INFO] Final Memory: 14M/169M
[INFO] ------------------------------------------------------------------------

第一个错误类型是针对此类中的字段的：

 package com.mangusbrother.akka.calculator.lib.operation.multiply;

import com.mangusbrother.akka.calculator.lib.operation.MathematicalResult;
import lombok.Data;

/**
 * Created by Mangusbrother on 14/02/2016.
 */
@Data
public class MultiplyResult implements MathematicalResult {
    private static final long serialVersionUID = 738641818941986L;
    private final int firstNumber;
    private final int secondNumber;
    private final int result;
}

第二个错误是当一个类试图从 lombok 类访问 getter

我的 maven pom.xml 中有以下内容：

 <properties>
    <lombok.version>1.16.6</lombok.version>
</properties>
<dependencies>
   <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>${lombok.version}</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>

原文由 mangusbrother 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

我不知道为什么，但是由于 maven-compiler-plugin，您遇到了编译器错误。如果可以，请将插件版本更改为 3.5 并检查它是否可以工作。

原文由 grzesiekw 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

将 annotationProcessorPaths 添加到您的 maven-compiler-plugins 配置中：

 <plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <version>${maven-compiler-plugin.version}</version>
  <configuration>
    <annotationProcessorPaths>
      <path>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>${lombok.version}</version>
      </path>
    </annotationProcessorPaths>
  </configuration>
</plugin>

原文由 Renato Garcia 发布，翻译遵循 CC BY-SA 4.0 许可协议