我在src/main/java目录中有一个实体类，如下所示：

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class Student {
    private String firstName;
    private String lastName;

    @Column(name = "email_address",
    nullable = false
    )
    private String emailId;
    private String gaurdianName;
    private String gaurdianEmail;
    private String gaurdianMobile;

}

在src/test/java目录下的测试类中，我无法访问上面类中的Lombok特性，如setter和getter、builder方法和Lombok的其他特性。
问题出在哪里？
在我的测试类中，我想用builder方法或getter和setter方法创建一个student类的对象，如下所示：

Student student = new Student();

student.setFirstName("John"); // it doesn't work
student.getFirstName(); // it doesn't work
Student student = Student.builder().firstName("JOHN").build(); // it doesn't work

下面是我的pom.xml：

<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>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</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>