java.lang.IllegalArgumentException: अपरिचित प्रकार: [शून्य]

Question

मेरे पास बनाई गई स्प्रिंग एमवीसी प्रोजेक्ट में निम्न संरचना है।

public class CustomerTest { 
//@Mock 
//private Customer customer; 
@Mock 
private CustomerService service; 

@InjectMocks 
private CustomersController custcontroller; 
private MockMvc mockmvc; 
/* Before executes before each and every test */ 
@Before 
public void setup() { 
    MockitoAnnotations.initMocks(this); 
    mockmvc = MockMvcBuilders.standaloneSetup(custcontroller).build(); 

} 

/*test that our requests are being sent*/ 

@Test 
public void getExistingCustomerEntry() throws Exception { 
    // assertEquals(expected parameter,your parameter) 
    Customer cust = new Customer(); 
    cust.setCustomer_id(1L); 
    cust.setName("sam"); 
    when(service.find(1L)).thenReturn(cust); 
    try { 
    mockmvc.perform(get("/rest/cust-entries/1")) 
    .andExpect((jsonPath("$.name", Is.is(cust.getName())))) 
    .andExpect(jsonPath("$.links[*].href", hasItem(endsWith("/cust-entries/1")))) 
    .andExpect(status().isOk()) 
    .andDo(print()); 
    } catch(Exception e) { 
     throw e; 
    } 
} 
} 

नियंत्रक क्लास के रूप में नीचे है:

@Controller 
public class CustomersController { 
    private CustomerService service; 

public CustomersController(CustomerService service) { 
    this.service = service; 
} 
/*used a path variable to allow to bind a variable in the url to the Java variable*/ 
@RequestMapping(value = "/rest/cust-entries/{customer_id}", method= RequestMethod.GET) 
public ResponseEntity<CustomerResource> getCustomerEntry(@PathVariable Long customer_id) { 
    Customer custEntry = service.find(customer_id); 
    System.out.println("Was here" + customer_id); 
    CustomerResource resource = new CustomerServiceEntryAsm().toResource(custEntry); 
    return new ResponseEntity<CustomerResource>(resource,HttpStatus.OK); 
} 

} 

मैं CustomerTest वर्ग

CustomerTest 

test.java.CustomerTest getExistingCustomerEntry (test.java चलाने के बाद निम्न त्रुटि संदेश मिलता है .CustomerTest) org.springframework.web.util.NestedServletException: अनुरोध प्रसंस्करण विफल रहा; नेस्टेड अपवाद java.lang.IllegalArgumentException है: अपरिचित प्रकार: [अमान्य]

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:981) 

at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:860) 

at javax.servlet.http.HttpServlet.service(HttpServlet.java:620) 

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:845) 

at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:65) 

at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 

at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:167) 

at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134) 

at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:155) 

at test.java.CustomerTest.getExistingCustomerEntry(CustomerTest.java:74) 

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:497) 

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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) 

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:50) 

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:675) 

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) 

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) 

की वजह से: java.lang.IllegalArgumentException: अपरिचित प्रकार: [अमान्य]

at com.fasterxml.jackson.databind.type.TypeFactory._fromAny(TypeFactory.java:1109) 

at com.fasterxml.jackson.databind.type.TypeFactory.constructType(TypeFactory.java:566) 

at com.fasterxml.jackson.databind.type.TypeFactory.constructType(TypeFactory.java:602) 

at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.getJavaType(AbstractJackson2HttpMessageConverter.java:311) 

at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:249) 

at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:100) 

at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:222) 

at org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.handleReturnValue(HttpEntityMethodProcessor.java:183) 

at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:80) 

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:126) 

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814) 

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737) 

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) 

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) 

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) 

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:969) 

... 33 more 

मैं JUnit परीक्षण डिबग और नियंत्रक वर्ग और संसाधन की वापसी प्रकार पर एक शून्य तर्क के अपवाद मैं गलत यहाँ क्या कर रहा हूँ निम्न पंक्ति

return new ResponseEntity<CustomerResource>(resource,HttpStatus.OK); 

पर है?

Answer 1

मुझे कल इस तरह से कुछ भुगतना पड़ा। यदि आप जैक्सन 2.7 का उपयोग कर रहे हैं - बसंत 4.3 से कम वसंत के किसी भी संस्करण के साथ - आपको शायद यह मिल जाएगा।

तो जैकसन को 2.6.5 (अपने वसंत संस्करण के आधार पर) डाउनग्रेड करें - और इसमें एक अच्छा बदलाव होगा।