java - 在 JsonObject 中存储资源输出时出现 com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException

Question

我正在尝试使用 Jersey Client 库自动化 REST API，因此我在 pom.xml 中遵循了依赖项 -

     <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-client</artifactId>
        <version>2.25.1</version>
    </dependency>


    <dependency>
        <groupId>org.json</groupId>
        <artifactId>json</artifactId>
        <version>20190722</version>
    </dependency>

    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-json-jackson</artifactId>
        <version>2.25.1</version>
    </dependency>

代码如下 -

@Test
public void test(){
    Client client = ClientBuilder.newClient();
    WebTarget webTarget = client.target("http://md5.jsontest.com/");
    WebTarget zipTarget = webTarget.queryParam("text", 123);
    Invocation.Builder invocationBuilder = zipTarget.request(MediaType.APPLICATION_JSON_TYPE);
    JSONObject jsonObject = invocationBuilder.get(JSONObject.class);
}

但是它会导致以下错误 JSONObject jsonObject = invokingBuilder.get(JSONObject.class); -

javax.ws.rs.client.ResponseProcessingException: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "original" (class org.json.JSONObject), not marked as ignorable (0 known properties: ])
at [Source: org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream@19b89d4; line: 2, column: 17] (through reference chain: org.json.JSONObject["original"])
    at org.glassfish.jersey.client.JerseyInvocation.translate(JerseyInvocation.java:809)
    at org.glassfish.jersey.client.JerseyInvocation.access$700(JerseyInvocation.java:92)
    at org.glassfish.jersey.client.JerseyInvocation$2.call(JerseyInvocation.java:701)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:228)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:444)
    at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:697)
    at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:420)
    at org.glassfish.jersey.client.JerseyInvocation$Builder.get(JerseyInvocation.java:316)
    at jerseyclienttest.JerseyTest.test(JerseyTest.java:23)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:133)
    at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:584)
    at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:172)
    at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
    at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:804)
    at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:145)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
    at java.util.ArrayList.forEach(ArrayList.java:1257)
    at org.testng.TestRunner.privateRun(TestRunner.java:770)
    at org.testng.TestRunner.run(TestRunner.java:591)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:402)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:396)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:355)
    at org.testng.SuiteRunner.run(SuiteRunner.java:304)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1180)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1102)
    at org.testng.TestNG.runSuites(TestNG.java:1032)
    at org.testng.TestNG.run(TestNG.java:1000)
    at org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:73)
    at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:123)
Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "original" (class org.json.JSONObject), not marked as ignorable (0 known properties: ])
 at [Source: org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream@19b89d4; line: 2, column: 17] (through reference chain: org.json.JSONObject["original"])
    at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:62)
    at com.fasterxml.jackson.databind.DeserializationContext.handleUnknownProperty(DeserializationContext.java:834)
    at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:1094)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:1470)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownVanilla(BeanDeserializerBase.java:1448)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:282)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:140)
    at com.fasterxml.jackson.databind.ObjectReader._bind(ObjectReader.java:1580)
    at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:961)
    at com.fasterxml.jackson.jaxrs.base.ProviderBase.readFrom(ProviderBase.java:808)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.invokeReadFrom(ReaderInterceptorExecutor.java:256)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.aroundReadFrom(ReaderInterceptorExecutor.java:235)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:155)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.readFrom(MessageBodyFactory.java:1085)
    at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:874)
    at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:808)
    at org.glassfish.jersey.client.ClientResponse.readEntity(ClientResponse.java:326)
    at org.glassfish.jersey.client.JerseyInvocation.translate(JerseyInvocation.java:806)
    ... 37 more

您能否帮助理解这里还需要哪些依赖项，或者 API 本身有问题吗？

Answer 1

这是设置从 url 检索数据，该 URL 将返回 JSON:

WebTarget webTarget = client.target("http://md5.jsontest.com/");

这会将 JSON 转换为 Java 对象:

JSONObject jsonObject = invocationBuilder.get(JSONObject.class);

UnrecognizedPropertyException 表示返回的 JSON 与 Java 对象 JSONObject 中的任何成员都不匹配。如果返回的 JSON 为:

{
  "new": "ok",
  "original": "notok"
}

会产生该错误的 Java 类是:

class Result {
  private String new;

  // getters/setters
}

修复错误的类是:

class Result {
  private String new;
  private String original;

  // getters/setters
}

或

@JsonIgnoreProperties
class Result {
  private String new;

  // getters/setters
}

但问题是，您正在传递 JSONObject，一个内置类。您需要创建自己的类来处理返回的与您正在使用的 JSON 架构相匹配的 JSON。