【发布时间】：2017-12-18 07:32:34
【问题描述】：
我无法将这个新文件添加到我的构造函数中，它在 json 中不存在，并且它抛出错误，有人可以帮我解决这个问题。我尝试了两个注释@JsonIgnoreProperties 和@JsonIgnore 和@JsonIgnoreProperties(ignoreUnknown = true) 以及类级别和构造函数级别
以下是我的代码，错误详情同上
public static class Location {
private String a;
@Wither private int b;
@Wither private int c;
@Wither private int d;
@Wither private int newFiled; //which not there in json
//创建
@JsonCreator
public Location(@JsonProperty("A") String a,
@JsonProperty("B") int b,
@JsonProperty("C") int b,
@JsonProperty("D") int d,
int newFiled) {
this.a = a;
this.b = b;
this.c = c;
this.d = d;
this.newFiled = newFiled;
}
public int newFiled() {
return a+b+c;
}
Error:
} 2017-12-18 12:53:24,194 WARN o.s.h.c.j.MappingJackson2HttpMessageConverter [I/O dispatcher 3] Failed to evaluate deserialization for type [simple type, class com.gap.plan.allocati
fasterxml.jackson.databind.JsonMappingException: Argument #4 of constructor [constructor for com.gap.plan.allocation.model.SkuInventory$DCLocation, annota
tions: {interface com.fasterxml.jackson.annotation.JsonIgnoreProperties=@com.fasterxml.jackson.annotation.JsonIgnoreProperties(ignoreUnknown=true, allowGetters=false, value=[], allow
Setters=false), interface com.fasterxml.jackson.annotation.JsonCreator=@com.fasterxml.jackson.annotation.JsonCreator(mode=DEFAULT)}] has no property name annotation; must have name w
hen multiple-parameter constructor annotated as Creator
{} 2017-12-18 12:53:24,196 ERROR c.g.p.a.s.ProductAllocationService [ForkJoinPool-2-worker-36] Unknown processing error
org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [class com.gap.plan.allocation.model.SkuInven
tory] and content type [application/json;charset=UTF-8]
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:109) ~[spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:835) ~[spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:819) ~[spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.web.client.AsyncRestTemplate$ResponseExtractorFuture.convertResponse(AsyncRestTemplate.java:680) ~[spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.web.client.AsyncRestTemplate$ResponseExtractorFuture.adapt(AsyncRestTemplate.java:667) ~[spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.web.client.AsyncRestTemplate$ResponseExtractorFuture.adapt(AsyncRestTemplate.java:642) ~[spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.util.concurrent.FutureAdapter.adaptInternal(FutureAdapter.java:100) ~[spring-core-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.util.concurrent.ListenableFutureAdapter$1.onSuccess(ListenableFutureAdapter.java:56) ~[spring-core-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.util.concurrent.ListenableFutureCallbackRegistry.success(ListenableFutureCallbackRegistry.java:118) ~[spring-core-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.http.client.HttpComponentsAsyncClientHttpRequest$HttpResponseFutureCallback.completed(HttpComponentsAsyncClientHttpRequest.java:121) ~[spring-web-4.2.4
.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.http.client.HttpComponentsAsyn c
ClientHttpRequest$HttpResponseFutureCallback.completed(HttpComponentsAsyncClientHttpRequest.java:102) ~[spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:119) ~[httpcore-4.4.4.jar:4.4.4]
at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.responseCompleted(DefaultClientExchangeHandlerImpl.java:177) ~[httpasyncclient-4.1.1.jar:4.1.1]
at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.processResponse(HttpAsyncRequestExecutor.java:432) ~[httpcore-nio-4.4.4.jar:4.4.4]
at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:325) ~[httpcore-nio-4.4.4.jar:4.4.4]
at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:267) ~[httpcore-nio-4.4.4.jar:4.4.4]
at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:81) ~[httpasyncclient-4.1.1.jar:4.1.1]
at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:39) ~[httpasyncclient-4.1.1.jar:4.1.1]
at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:123) ~[httpcore-nio-4.4.4.jar:4.4.4]
at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:164) ~[httpcore-nio-4.4.4.jar:4.4.4]
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:339) ~[httpcore-nio-4.4.4.jar:4.4.4]
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:317) ~[httpcore-nio-4.4.4.jar:4.4.4]
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:278) ~[httpcore-nio-4.4.4.jar:4.4.4]
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:106) ~[httpcore-nio-4.4.4.jar:4.4.4]
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:590) ~[httpcore-nio-4.4.4.jar:4.4.4]
at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_131]
【问题讨论】：
-
如果您知道这个字段不是 JSON 文档的一部分，那么添加 newFiled 作为用 JsonCreator 注释的构造函数的参数有什么意义？只是不要将它添加到构造函数中。
-
@JB Nizet 如果我不在构造函数中添加该字段，则会引发错误
-
错误是什么？
-
它只是正常的编译时错误，我只想映射总值 newFiled
-
所以，如果我理解正确（我要求错误，但您显然拒绝提供它），您的代码也在调用构造函数，并使用 newFiled 作为参数。因此，创建 2 个构造函数：一个带有 newFiled，由您的代码使用，但未使用 JsonCreator 注释，另一个没有 newFiled，由 Jackson 使用，并使用 JsonCreator 注释。
标签： java spring-boot jackson