Spring工具套件/Gradle/MapStruct-找不到映射器的实现
Spring工具套件/Gradle/MapStruct-找不到映射器的实现
提问于 2022-03-28 17:09:22
我已在StackOverflow上寻找我问题的答案。虽然我找到了许多提供的解决办法，但没有一个在我的情况下有效。
我必须在工作中使用MapStruct来完成一个项目，所以我正在尝试通过图托里亚斯普林特来学习它。但是，我使用的不是本教程所建议的Maven，而是使用Gradle，因为我的公司使用Gradle而不是Maven。我在StackOverflow中看到了将项目转移到Maven中的答案，但在我的例子中，这不是一个选项。
我使用的是1.4.2版本，而不是1.5.0.RC1，因为我在使用后者时遇到了不同的问题，后者通过切换到前者来解决。
下面是我的代码的部分：
build.gradle
plugins {
id 'org.springframework.boot' version '2.6.5'
id 'io.spring.dependency-management' version '1.0.11.RELEASE'
id 'java'
}
group = 'com.tutorialspoint'
version = '2.4.2'
sourceCompatibility = '1.8'
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
implementation group: 'org.mapstruct', name: 'mapstruct', version: '1.4.2.Final'
implementation 'org.mapstruct:mapstruct:1.4.2.Final'
annotationProcessor "org.mapstruct:mapstruct-processor:1.4.2.Final"
compileOnly 'org.mapstruct:mapstruct-processor:1.4.2.Final'
}
tasks.named('test') {
useJUnitPlatform()
}
compileJava {
options.compilerArgs += [
'-Amapstruct.suppressGeneratorTimestamp=true',
'-Amapstruct.suppressGeneratorVersionInfoComment=true',
'-Amapstruct.verbose=true'
]
}Student.java
package com.tutorialspoint.mapstructproject;
public class Student {
private int id;
private String name;
private String className;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getClassName() {
return className;
}
public void setClassName(String className) {
this.className = className;
}
}StudentEntity.java
package com.tutorialspoint.mapstructproject;
public class StudentEntity {
private int id;
private String name;
private String classVal;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getClassVal() {
return classVal;
}
public void setClassVal(String classVal) {
this.classVal = classVal;
}
}StudentMapper.java
package com.tutorialspoint.mapstructproject;
import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
@Mapper(componentModel="spring")
public interface StudentMapper {
@Mapping(target="className", source="classVal")
Student getModelFromEntity(StudentEntity student);
@Mapping(target="classVal", source="className")
StudentEntity getEntityFromModel(Student student);
}StudentMapperTest.java
package com.tutorialspoint.mapstructproject;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
import org.mapstruct.factory.Mappers;
import com.tutorialspoint.mapstructproject.StudentEntity;
import com.tutorialspoint.mapstructproject.StudentMapper;
import com.tutorialspoint.mapstructproject.Student;
public class StudentMapperTest {
private StudentMapper studentMapper = Mappers.getMapper(StudentMapper.class);
@Test
public void testEntityToModel() {
StudentEntity entity = new StudentEntity();
entity.setClassVal("X");
entity.setName("John");
entity.setId(1);
Student model = studentMapper.getModelFromEntity(entity);
assertEquals(entity.getClassVal(), model.getClassName());
assertEquals(entity.getName(), model.getName());
assertEquals(entity.getId(), model.getId());
}
@Test
public void testModelToEntity() {
Student model = new Student();
model.setId(1);
model.setName("John");
model.setClassName("X");
StudentEntity entity = studentMapper.getEntityFromModel(model);
assertEquals(entity.getClassVal(), model.getClassName());
assertEquals(entity.getName(), model.getName());
assertEquals(entity.getId(), model.getId());
}
}下面是堆栈跟踪：
java.lang.RuntimeException: java.lang.ClassNotFoundException: Cannot find implementation for com.tutorialspoint.mapstructproject.StudentMapper
at org.mapstruct.factory.Mappers.getMapper(Mappers.java:61)
at com.tutorialspoint.mapstructproject.StudentMapperTest.<init>(StudentMapperTest.java:11)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at org.junit.platform.commons.util.ReflectionUtils.newInstance(ReflectionUtils.java:550)
at org.junit.jupiter.engine.execution.ConstructorInvocation.proceed(ConstructorInvocation.java:56)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
at org.junit.jupiter.api.extension.InvocationInterceptor.interceptTestClassConstructor(InvocationInterceptor.java:73)
at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:77)
at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestClassConstructor(ClassBasedTestDescriptor.java:355)
at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateTestClass(ClassBasedTestDescriptor.java:302)
at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.instantiateTestClass(ClassTestDescriptor.java:79)
at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance(ClassBasedTestDescriptor.java:280)
at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$4(ClassBasedTestDescriptor.java:272)
at java.base/java.util.Optional.orElseGet(Optional.java:369)
at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$5(ClassBasedTestDescriptor.java:271)
at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances(TestInstancesProvider.java:31)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0(TestMethodTestDescriptor.java:102)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:101)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:66)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$2(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:90)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:84)
at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:98)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:40)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:768)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: java.lang.ClassNotFoundException: Cannot find implementation for com.tutorialspoint.mapstructproject.StudentMapper
at org.mapstruct.factory.Mappers.getMapper(Mappers.java:75)
at org.mapstruct.factory.Mappers.getMapper(Mappers.java:58)
... 68 more更新:有人询问了构建文件的情况。我在我的项目中没有看到一个构建文件，可能是因为由于错误，构建从未成功。以下是我的文件结构：
回答 1
Stack Overflow用户
发布于 2022-11-07 09:08:25
对我来说，工作：
implementation group: 'org.mapstruct', name: 'mapstruct', version: '1.5.3.Final'
implementation group: 'org.mapstruct', name: 'mapstruct-processor', version: '1.5.3.Final'
compileOnly group: 'org.projectlombok', name: 'lombok', version: '1.18.24'
annotationProcessor group: 'org.projectlombok', name: 'lombok', version: '1.18.24'
annotationProcessor group: 'org.mapstruct', name: 'mapstruct-processor', version: '1.5.3.Final'取自https://github.com/mapstruct/mapstruct-examples/blob/main/mapstruct-lombok/build.gradle
可以选择不使用而不使用(请使用confirm )：
annotationProcessor group: 'org.mapstruct', name: 'mapstruct-processor', version: '1.5.3.Final'页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/71651101
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