使用Lombok找不到符号异常

问题描述 投票：0回答：1

我在 Spring 项目中使用 Lombok，因为我使用 IDE Visual Studio Code 和 Java 插件扩展包，所以会自动创建必要的生成源。这在 IDE 内部有效，但在 IDE 外部则失败。

运行“./mvnw clean package”时出现错误：

cannot find symbol
。我坚信这个问题是由于 pom.xml 文件中缺少配置导致的，这会在打包之前触发创建生成的源。

如何在打包之前触发 Lombok 生成源的创建？

这是我的pom.xml：

<?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 https://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>3.3.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.myproject</groupId>
    <artifactId>base</artifactId>
    <version>0.0.1</version>
    <name>base</name>
    <description>My Project Base</description>
    <url/>
    <licenses>
        <license/>
    </licenses>
    <developers>
        <developer/>
    </developers>
    <scm>
        <connection/>
        <developerConnection/>
        <tag/>
        <url/>
    </scm>
    <properties>
        <java.version>23</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-crypto</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.34</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-jpamodelgen</artifactId>
            <version>6.1.7.Final</version>
        </dependency>

        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt-api</artifactId>
            <version>0.11.5</version>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt-impl</artifactId>
            <version>0.11.5</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt-jackson</artifactId>
            <version>0.11.5</version>
            <scope>runtime</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

编辑1：

我在使用 Lombok 的任何地方都会遇到错误，即这个错误：

[ERROR] /home/myuser/Documents/Programming/myproject/backend/base/src/main/java/com/myproject/base/service/logic/SettingService.java:[11,42] cannot find symbol
  symbol:   class Setting_
  location: package com.myproject.base.data.model.entity

在此实例中，类 

SettingService
尝试导入此内容但失败：

import com.glasses.base.data.model.entity.Setting_;

像这样使用它 

SETTING_KEY
:

Sort sort = Sort.by(Sort.Direction.ASC, Setting_.SETTING_KEY)
       .and(Sort.by(Sort.Direction.ASC, Setting_.SETTING_VALUE));


Setting
类看起来像这样：

导入 jakarta.persistence.Entity; 导入 jakarta.persistence.GenerateValue; 导入 jakarta.persistence.GenerationType; 导入 jakarta.persistence.Id; 导入 jakarta.persistence.Table; 导入 jakarta.validation.constraints.NotBlank; 导入 jakarta.validation.constraints.Size; 导入lombok.AllArgsConstructor； 导入lombok.Data； 导入 lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(name = "setting")
public class Setting {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotBlank
    @Size(min = 1, max = 50)
    private String settingKey;

    @NotBlank
    @Size(min = 1, max = 50)
    private String settingValue;

    public Setting(String settingKey, String settingValue) {
        this.settingKey = settingKey;
        this.settingValue = settingValue;
    }
}

这里的问题是这个文件缺少“target/ generated-sources/annotations/com/glasses/base/data/model/entity/Setting_.java”，它看起来像这样：

import jakarta.persistence.metamodel.SingularAttribute;
import jakarta.persistence.metamodel.StaticMetamodel;
import javax.annotation.processing.Generated;

@Generated(value = "org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor")
@StaticMetamodel(Setting.class)
public abstract class Setting_ {

    public static volatile SingularAttribute<Setting, String> settingValue;
    public static volatile SingularAttribute<Setting, Long> id;
    public static volatile SingularAttribute<Setting, String> settingKey;

    public static final String SETTING_VALUE = "settingValue";
    public static final String ID = "id";
    public static final String SETTING_KEY = "settingKey";

}

目前该文件仅由IDE生成，而不是由Maven生成。这是需要改变的。

java spring maven lombok cannot-find-symbol
1个回答
0
投票

您需要将 

maven-processor-plugin
添加到 
the pom.xml

确保生成的类在编译之前创建。 该插件运行注释处理器，例如在生成源阶段生成 Lombok 和 Hibernate JPA 模型所需的注释处理器。

https://mvnrepository.com/artifact/org.bsc.maven/maven-processor-plugin[maven-processor-plugin]

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