无法构造 `java.time.ZonedDateTime` 的实例（没有创建者，如默认构造，存在）
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时间：2020-08-10 23:40:42 来源:igfitidea点击:
Cannot construct instance of `java.time.ZonedDateTime` (no Creators, like default construct, exist)
提问by Mincong Huang
I'm learning Hymanson under JAX-RS 1.0. The server returns a HTTP response as follows:
我正在 JAX-RS 1.0 下学习Hyman逊。服务器返回 HTTP 响应如下：
{
"url": "http://localhost:8080/api/123",
"created": "2018-05-26T09:21:26.301+02:00"
}
and I need to deserialize the JSON response into a Java object called ProductCreated:
我需要将 JSON 响应反序列化为一个名为 的 Java 对象ProductCreated：
public class ProductCreated {
@JsonProperty("created")
private final ZonedDateTime created;
@JsonProperty("url")
private final String url;
public ProductCreated(String url) {
this.url = url;
this.created = ZonedDateTime.now();
}
@JsonCreator
public ProductCreated(
@JsonProperty("url") String url,
@JsonProperty("created") ZonedDateTime created) {
this.url = url;
this.created = created;
}
public String getUrl() {
return url;
}
public ZonedDateTime getCreated() {
return created;
}
}
In my test, it failed to construct the ProductCreatedobject:
在我的测试中，它无法构造ProductCreated对象：
Product p = new Product("123", "foo");
ProductCreated c = wr.type(MediaType.APPLICATION_JSON)
.accept(MediaType.APPLICATION_JSON)
.post(ProductCreated.class, p);
And the client side error is:
客户端错误是：
Cannot construct instance of
java.time.ZonedDateTime(no Creators, like default construct, exist): no String-argument constructor/factory method to deserialize from String value ('2018-05-26T09:21:26.301+02:00')
无法构造实例
java.time.ZonedDateTime（没有创建者，如默认构造，存在）：没有从字符串值反序列化的字符串参数构造函数/工厂方法（'2018-05-26T09:21:26.301+02:00'）
On the server side, I configured the JSON mapper (but no effect to my test since test is client side?):
在服务器端，我配置了 JSON 映射器（但对我的测试没有影响，因为测试是客户端？）：
private static HymansonJsonProvider newHymansonJsonProvider() {
ObjectMapper mapper =
new ObjectMapper()
.registerModule(new ParameterNamesModule())
.registerModule(new Jdk8Module())
.registerModule(new JavaTimeModule()); // new module, NOT JSR310Module
mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
mapper.setDateFormat(new StdDateFormat());
return new HymansonJsonProvider(mapper);
}
What am I missing here?
我在这里缺少什么？
The full stack-trace:
完整的堆栈跟踪：
objc[91369]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/bin/java (0x10fe224c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x11164e4e0). One of the two will be used. Which one is undefined.
May 26, 2018 9:48:29 AM com.sun.jersey.server.impl.application.WebApplicationImpl _initiate
INFO: Initiating Jersey application, version 'Jersey: 1.19.4 05/24/2017 03:46 PM'
May 26, 2018 9:48:31 AM org.glassfish.grizzly.http.server.NetworkListener start
INFO: Started listener bound to [localhost:8080]
May 26, 2018 9:48:31 AM org.glassfish.grizzly.http.server.HttpServer start
INFO: [HttpServer] Started.
May 26, 2018 9:48:31 AM io.mincong.shop.rest.MyRequestFilter filter
INFO: filter
May 26, 2018 9:48:31 AM org.glassfish.grizzly.http.server.NetworkListener stop
INFO: Stopped listener bound to [localhost:8080]
com.sun.jersey.api.client.ClientHandlerException: com.fasterxml.Hymanson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.time.ZonedDateTime` (no Creators, like default construct, exist): no String-argument constructor/factory method to deserialize from String value ('2018-05-26T09:48:31.622+02:00')
at [Source: (sun.net.www.protocol.http.HttpURLConnection$HttpInputStream); line: 1, column: 50] (through reference chain: io.mincong.shop.rest.dto.ProductCreated["created"])
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:644)
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:586)
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:686)
at com.sun.jersey.api.client.WebResource.access0(WebResource.java:74)
at com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java:570)
at io.mincong.shop.rest.ProductResourceIT.createProduct(ProductResourceIT.java:53)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.accessClientConfig cc = new DefaultClientConfig();
cc.getSingletons().add(ShopApplication.newHymansonJsonProvider());
wr = Client.create(cc).resource(Main.BASE_URI.resolve("products"));
0(ParentRunner.java:58)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: com.fasterxml.Hymanson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.time.ZonedDateTime` (no Creators, like default construct, exist): no String-argument constructor/factory method to deserialize from String value ('2018-05-26T09:48:31.622+02:00')
at [Source: (sun.net.www.protocol.http.HttpURLConnection$HttpInputStream); line: 1, column: 50] (through reference chain: io.mincong.shop.rest.dto.ProductCreated["created"])
at com.fasterxml.Hymanson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:67)
at com.fasterxml.Hymanson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1451)
at com.fasterxml.Hymanson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1027)
at com.fasterxml.Hymanson.databind.deser.ValueInstantiator._createFromStringFallbacks(ValueInstantiator.java:371)
at com.fasterxml.Hymanson.databind.deser.std.StdValueInstantiator.createFromString(StdValueInstantiator.java:323)
at com.fasterxml.Hymanson.databind.deser.BeanDeserializerBase.deserializeFromString(BeanDeserializerBase.java:1366)
at com.fasterxml.Hymanson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:171)
at com.fasterxml.Hymanson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:161)
at com.fasterxml.Hymanson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:529)
at com.fasterxml.Hymanson.databind.deser.BeanDeserializer._deserializeWithErrorWrapping(BeanDeserializer.java:528)
at com.fasterxml.Hymanson.databind.deser.BeanDeserializer._deserializeUsingPropertyBased(BeanDeserializer.java:417)
at com.fasterxml.Hymanson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1280)
at com.fasterxml.Hymanson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:326)
at com.fasterxml.Hymanson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)
at com.fasterxml.Hymanson.databind.ObjectReader._bind(ObjectReader.java:1574)
at com.fasterxml.Hymanson.databind.ObjectReader.readValue(ObjectReader.java:965)
at com.fasterxml.Hymanson.jaxrs.base.ProviderBase.readFrom(ProviderBase.java:815)
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:634)
... 29 more
采纳答案by Mincong Huang
As @PaulSamsotha pointed out, I need to register the HymansonJsonProvider on the client side too:
正如@PaulSamsotha 指出的，我也需要在客户端注册 HymansonJsonProvider：
private static HymansonJsonProvider newHymansonJsonProvider() {
ObjectMapper mapper =
new ObjectMapper()
.registerModule(new ParameterNamesModule())
.registerModule(new Jdk8Module())
.registerModule(new JavaTimeModule()); // new module, NOT JSR310Module
mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
mapper.setDateFormat(new StdDateFormat());
return new HymansonJsonProvider(mapper);
}
which contains the customized solution:
其中包含定制的解决方案：
ObjectMapper objectMapper = new ObjectMapper()
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
objectMapper.registerModule(new JavaTimeModule())
MyObject myObject = objectMapper.readValue(new File("src/test/resources/data/my_object.json"), MyObject.class)
回答by Tony Zampogna
I was able to deserialize a JSON file with a ZonedDateTime with this code.
我能够使用此代码反序列化带有 ZonedDateTime 的 JSON 文件。
##代码##