如何解决@Mapper无法正确生成Implementation类
我正在使用Mappstruct和Lombok进行春季启动。当我使用Mapper注释自动实现mapper类时,该注释无法为我的类生成正确的mapper实现。
这是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>2.3.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.domotichouse.app</groupId>
<artifactId>SpringDomoticHouse</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>SpringDomoticHouse</name>
<description>Spring proyect for the domotic of my house</description>
<properties>
<java.version>11</java.version>
<mapstruct.version>1.3.1.Final</mapstruct.version>
<lombok.version>1.18.16</lombok.version>
<log4j2.version>2.13.3</log4j2.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-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>MysqL</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-to-slf4j</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-jdk8</artifactId>
<version>${mapstruct.version}</version>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<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>${maven-compiler-plugin.version}</version>
<configuration>
<source>11</source>
<target>11</target>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</path>
<annotationProcessorPath>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</annotationProcessorPath>
</annotationProcessorPaths>
</configuration>
</plugin>
</plugins>
</build>
这是我的2个对象,可以相互映射: 第一个:
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
@SuppressWarnings("unused")
public class User {
private Integer id;
private String usrLogin;
private String pass;
private String name;
private String surname;
private Boolean enabled;
}
第二个:
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
@SuppressWarnings("unused")
public class UserRequest {
private Integer id;
private String usrLogin;
private String pass;
private String name;
private String surname;
private Boolean enabled;
}
我的Mapper接口:
import com.domotichouse.app.SpringDomoticHouse.application.dto.User;
import com.domotichouse.app.SpringDomoticHouse.rest.dto.UserRequest;
import org.mapstruct.Mapper;
import org.mapstruct.factory.Mappers;
@Mapper
public interface UserRestMapper {
UserRestMapper MAPPER = Mappers.getMapper(UserRestMapper.class);
User toAplication(UserRequest request);
}
这是注释实现接口的方式:
import com.domotichouse.app.SpringDomoticHouse.application.dto.User;
import com.domotichouse.app.SpringDomoticHouse.rest.dto.UserRequest;
public class UserRestMapperImpl implements UserRestMapper {
public UserRestMapperImpl() {
}
public User toAplication(UserRequest request) {
if (request == null) {
return null;
} else {
User user = new User();
return user;
}
}
}
您可以看到Mapper不会映射任何内容。 PD:我已经安装了lombok插件,并且@Data和@Builder注释按预期工作
解决方法
我们的工作方式如下:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>11</source>
<target>11</target>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</path>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</path>
</annotationProcessorPaths>
<compilerArgs>
<compilerArg>
-Amapstruct.defaultComponentModel=spring
</compilerArg>
</compilerArgs>
</configuration>
</plugin>
请注意<annotationProcessorPaths/>
部分中的区别。
您的问题似乎是该问题的重复部分: MapStruct and Lombok not working together
代替
<annotationProcessorPath>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</annotationProcessorPath>
您必须使用
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</path>
应该提供Maven依赖项“ mapstruct-processor”,
<scope>provided</scope>
此后,您必须使用包目标(mvn包)运行Maven构建,然后生成的类UserRestMapperImpl应该随您需要。
,<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${org.mapstruct.version}</version>
</path>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</path>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok-mapstruct-binding</artifactId>
<version>0.2.0</version>
</dependency>
</annotationProcessorPaths>
<compilerArgs>
<compilerArg>
-Amapstruct.defaultComponentModel=spring
</compilerArg>
</compilerArgs>
</configuration>
</plugin>
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