java - ModelMapper 配置错误（无法配置映射）
问题描述
我现在遇到的问题是，我的配置方法抛出异常，说存在配置错误，但我不知道问题是什么。
这是我的配置方法：
public class ModelMapperEmb {
public CasinoDto modelToDto(Casino casino){
ModelMapper modelMapper = new ModelMapper();
modelMapper.addMappings(new PropertyMap<Casino, CasinoDto>() {
@Override
protected void configure() {
map(source.getAddress().getCountry(), destination.getCountry());
map(source.getAddress().getHouseNumber(), destination.getHouseNumber());
map(source.getAddress().getPlace(), destination.getPlace());
map(source.getAddress().getStreet(), destination.getStreet());
}
});
modelMapper.getConfiguration().setMatchingStrategy(MatchingStrategies.LOOSE);
return modelMapper.map(casino, CasinoDto.class);
}
}
我这样做是因为模型映射器无法映射嵌入式资源，因此可嵌入类中的所有属性都在上面配置。
例外：
1) Failed to configure mappings
1 error
at org.modelmapper.internal.Errors.throwConfigurationExceptionIfErrorsExist(Errors.java:241)
at org.modelmapper.internal.ExplicitMappingBuilder.build(ExplicitMappingBuilder.java:244)
at org.modelmapper.internal.ExplicitMappingBuilder.build(ExplicitMappingBuilder.java:96)
at org.modelmapper.internal.TypeMapImpl.addMappings(TypeMapImpl.java:92)
at org.modelmapper.internal.TypeMapStore.getOrCreate(TypeMapStore.java:124)
at org.modelmapper.ModelMapper.addMappings(ModelMapper.java:113)
at at.privas.casino.service.ModelMapperEmb.modelToDto(ModelMapperEmb.java:13)
at at.privas.casino.persistence.ModelMapperTest.verifyCasinoToDtoMappingCasino(ModelMapperTest.java:29)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:675)
at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:125)
at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:132)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:124)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:74)
at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:104)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:62)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:43)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:35)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:202)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:198)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1507)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1507)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 57
at org.modelmapper.internal.asm.ClassReader.<init>(ClassReader.java:176)
at org.modelmapper.internal.asm.ClassReader.<init>(ClassReader.java:158)
at org.modelmapper.internal.asm.ClassReader.<init>(ClassReader.java:146)
at org.modelmapper.internal.asm.ClassReader.<init>(ClassReader.java:273)
at org.modelmapper.internal.ExplicitMappingBuilder.visitPropertyMap(ExplicitMappingBuilder.java:255)
at org.modelmapper.PropertyMap.configure(PropertyMap.java:386)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at org.modelmapper.internal.ExplicitMappingBuilder.build(ExplicitMappingBuilder.java:227)
... 69 more
以下是 CasinoDTO 的代码：
@Entity
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
@Getter
@Setter
public class Casino extends AbstractPersistable<Long> {
@Embedded
private Address address;
private Float sales;
@OneToMany(mappedBy = "casino", cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
private List<Slot> slots = new ArrayList<Slot>();
public void addAll(ArrayList<Slot> slots){
slots.stream()
.forEach(this::addSlot);
}
public void addSlot(Slot slot) {
slots.add(slot);
if(!this.equals(slot.getCasino())){
slot.setCasino(this);
}
}
public List<Slot> getSlots(){
return Collections.unmodifiableList(slots);
}
public boolean containsSlot(Slot slot) {
return slots.contains(slot);
}
}
插槽代码：
@Entity
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
@Getter
@Setter
public class Slot extends AbstractPersistable<Long> {
private String name;
private Float maxBet;
private Float jackpot;
@ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
@JsonIgnore
private Casino casino;
public void setCasino(Casino casino){
this.casino = casino;
if(!casino.containsSlot(this)){
casino.addSlot(this);
}
}
}
这是地址代码：
@Embeddable
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
@Getter
@Setter
public class Address {
private String country;
private String place;
private String street;
private String houseNumber;
}
CasinoDto代码：
@NoArgsConstructor
@AllArgsConstructor
@EqualsAndHashCode
@Getter
@Setter
public class CasinoDto extends RepresentationModel<CasinoDto> {
private Long id;
private Float sales;
private String country;
private String place;
private String street;
private String houseNumber;
}
这也是发生错误的测试：
private ModelMapperEmb modelMapper = new ModelMapperEmb();
@Test
void verifyCasinoToDtoMappingCasino(){
Casino casino = Casino.builder()
.address(Address.builder()
.country("österreich")
.houseNumber("12")
.place("Breitenfurt")
.street("Meisenweg")
.build())
.sales(1000f).build();
CasinoDto casinoDto = modelMapper.modelToDto(casino);
Assertions.assertThat(casinoDto).isEqualToComparingOnlyGivenFields(casino, "country", "houseNumber", "place", "street", "sales");
}
解决方案
Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 57
此异常由与 JDK 13 不兼容的库引发。
ModelMapper 2.3.0不适用于 Java 13 - 第一个支持它的版本是2.3.6
将 modelMapper 更新到 2.3.7 可以解决异常并CasinoDto modelToDto(Casino casino)正确映射Casino到CasinoDto实例。
您的测试方法断言中存在问题 - 它失败了，但是如果您调试该方法，您会发现映射是正确的：
Assertions.assertThat(casinoDto).isEqualToComparingOnlyGivenFields(casino, "country", "houseNumber", "place", "street", "sales");
如下更改断言以验证它：
Assertions.assertThat(casinoDto).isEqualToComparingOnlyGivenFields(casino.getAddress(), "country", "houseNumber", "place", "street");
Assertions.assertThat(casinoDto).isEqualToComparingOnlyGivenFields(casino, "sales");
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