org.codehaus.jackson.map.JsonMappingException：无法从START_OBJECT标记中反序列化java.util.ArrayList的实例

Question

我开发了一个Spring MVC + RestEasy + Hibernate示例并希望使用Junit测试它，但是看到以下错误：我也可以通过jsp或rest客户端调用这些Web服务。

org.jboss.resteasy.spi.ReaderException: org.codehaus.jackson.map.JsonMappingException: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
 at [Source: org.jboss.resteasy.client.core.SelfExpandingBufferredInputStream@23c30a20; line: 1, column: 1]
    at org.jboss.resteasy.client.core.BaseClientResponse.readFrom(BaseClientResponse.java:470)
    at org.jboss.resteasy.client.core.BaseClientResponse.getEntity(BaseClientResponse.java:385)
    at org.jboss.resteasy.client.core.BaseClientResponse.getEntity(BaseClientResponse.java:346)
    at test.resteasy.series.spring.mvc.hibernate.service.CustomerTest.testGetallcustomer(CustomerTest.java:19)
    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$1.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.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$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.codehaus.jackson.map.JsonMappingException: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
 at [Source: org.jboss.resteasy.client.core.SelfExpandingBufferredInputStream@23c30a20; line: 1, column: 1]
    at org.codehaus.jackson.map.JsonMappingException.from(JsonMappingException.java:163)
    at org.codehaus.jackson.map.deser.StdDeserializationContext.mappingException(StdDeserializationContext.java:219)
    at org.codehaus.jackson.map.deser.StdDeserializationContext.mappingException(StdDeserializationContext.java:212)
    at org.codehaus.jackson.map.deser.std.CollectionDeserializer.handleNonArray(CollectionDeserializer.java:246)
    at org.codehaus.jackson.map.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:204)
    at org.codehaus.jackson.map.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:194)
    at org.codehaus.jackson.map.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:30)
    at org.codehaus.jackson.map.ObjectMapper._readValue(ObjectMapper.java:2704)
    at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1315)
    at org.codehaus.jackson.jaxrs.JacksonJsonProvider.readFrom(JacksonJsonProvider.java:419)
    at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.readFrom(AbstractReaderInterceptorContext.java:59)
    at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:51)
    at org.jboss.resteasy.plugins.interceptors.encoding.GZIPDecodingInterceptor.aroundReadFrom(GZIPDecodingInterceptor.java:59)
    at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:53)
    at org.jboss.resteasy.client.core.BaseClientResponse.readFrom(BaseClientResponse.java:434)
    ... 26 more

这是我开发的Junit测试：

public class CustomerTest {
    static final String ROOT_URL = "http://localhost:8080/RestEasy-Spring-MVC-Hibernate/resteasy/";

    @Test
    public void testGetallcustomer() throws Exception {
        ClientRequest request = new ClientRequest(ROOT_URL+"customerservice/getallcustomer");
        ClientResponse<List<Customer>> response = request.get(new GenericType<List<Customer>>(){});
        List<Customer> customers = response.getEntity();
        System.out.println("SIZE : "+customers.size());

    }
}

看起来API也已弃用：

Answer 1

我不是说这是解决问题的方法。这是解决问题的另一种方法。

public class CustomerTest {
    final String path = "http://localhost:8080/RestEasy-Spring-MVC-Hibernate/";
    ICustomerService proxy = null;

    @Before
    public void beforeClass(){
        ResteasyClient client = new ResteasyClientBuilder().build();
        ResteasyWebTarget target = client.target(UriBuilder.fromPath(path));
        proxy = target.proxy(ICustomerService.class);
    }

    @Test
    public void testGetallcustomer() throws Exception {
        CustomerListType customers = proxy.getAllCustomerInfo();
        List<CustomerType> customerTypes = customers.getCustomerType();
        for (CustomerType customerType : customerTypes) {
            System.out.println("----------------------------------------------------");
            System.out.println("Name       : "+customerType.getName());
            System.out.println("Age        : "+customerType.getAge());
            System.out.println("CustomerId : "+customerType.getCustomerId());
        }
    }
}