Java 测试时为类提供了错误类型的id

我在测试时遇到了这个问题- 为class

com.myapp.ibank.domain.Customer提供的id类型错误。应为：class java.lang.Long，get class java.lang.String

老实说，我不明白我为什么会这样，以及到底发生了什么。当我正常使用它时，就像在本地tomcat上运行并通过控制器保存它，然后再使用服务，它工作得很好。没有错误。这种行为对我来说毫无意义

我使用JPA2.1和Hibernate作为提供程序

以下是测试代码：

@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextHierarchy({
        @ContextConfiguration(classes = RootConfig.class),
        @ContextConfiguration(classes = WebConfig.class)

})
@Transactional
public class AccountRepositoryTest {

    @Autowired
    private WebApplicationContext wac;
    @Autowired
    private AccountRepository accountRepository;
    @Autowired
    private CustomerService customerService;

    private MockMvc mockMvc;

    @Before
    public void setup() {
        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();

        Customer cus = new Customer();
        cus.setFirstName("John");
        cus.setLastName("Smith");
        customerService.save(cus);
    }

    @Test
    public void testSaveAccount() {

        Account account = new Account();
        account.setCustomer(customerService.findByName("John"));
        account.setName();
        account.setDebitCard(new DebitCard((long) 2000));

        accountRepository.create(account);
    }

    @Test
    public void testSavePremiumAccount() {

        PremiumAccount premAccount = new PremiumAccount();
        premAccount.setCustomer(customerService.findByName("John"));
        premAccount.setName();
        premAccount.setDebitCard(new DebitCard((long) 6000));
        premAccount.setCreditCard(new CreditCard((long) 12000));

        accountRepository.create(premAccount);
    }

}

我的客户实体（简短版本）：

我错过了什么，或者这是一个无法避免的冬眠一般错误？我在某处读到这是一个典型的错误

完整堆栈跟踪：

org.springframework.dao.InvalidDataAccessApiUsageException: Provided id of the wrong type for class com.ruruapps.ibank.domain.Customer. Expected: class java.lang.Long, got class java.lang.String; nested exception is java.lang.IllegalArgumentException: Provided id of the wrong type for class com.ruruapps.ibank.domain.Customer. Expected: class java.lang.Long, got class java.lang.String
    at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:381)
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:157)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:417)
    at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59)
    at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:147)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy45.findByName(Unknown Source)
    at com.ruruapps.ibank.service.CustomerServiceImpl.findByName(CustomerServiceImpl.java:40)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy48.findByName(Unknown Source)
    at com.ruruapps.ibank.AccountRepositoryTest.testSaveAccount(AccountRepositoryTest.java:55)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:72)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:81)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:216)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:82)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:60)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:67)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:162)
    at org.junit.runners.Suite.runChild(Suite.java:127)
    at org.junit.runners.Suite.runChild(Suite.java:26)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: java.lang.IllegalArgumentException: Provided id of the wrong type for class com.ruruapps.ibank.domain.Customer. Expected: class java.lang.Long, got class java.lang.String
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:1135)
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:1068)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:291)
    at com.sun.proxy.$Proxy44.find(Unknown Source)
    at com.ruruapps.ibank.repository.CustomerRepositoryImpl.findByName(CustomerRepositoryImpl.java:47)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    ... 59 more
Caused by: org.hibernate.TypeMismatchException: Provided id of the wrong type for class com.ruruapps.ibank.domain.Customer. Expected: class java.lang.Long, got class java.lang.String
    at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:134)
    at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1106)
    at org.hibernate.internal.SessionImpl.access$2000(SessionImpl.java:176)
    at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2587)
    at org.hibernate.internal.SessionImpl.get(SessionImpl.java:991)
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:1110)
    ... 75 more

客户服务实施：

@Service("customerService")
@Transactional
public class CustomerServiceImpl implements CustomerService {

    @Autowired
    private CustomerRepository customerRepository;

    @Override
    public void save(Customer customer) {
        customerRepository.save(customer);
    }

    @Override
    public List<Customer> findAll() {
        return customerRepository.findAll();
    }

    @Override
    public Customer findById(Long id) {
        return customerRepository.findById(id);
    }

    @Override
    public Customer findByName(String Name) {
        return customerRepository.findByName(Name);
    }
}

@Service（“customerService”）
@交易的
公共类CustomerServiceImpl实现CustomerService{
@自动连线
私人客户存储客户存储；
@凌驾
公共作废保存（客户）{
customerRepository.save（客户）；
}
@凌驾
公共列表findAll（）{
返回customerRepository.findAll（）；
}
@凌驾
公共客户findById（长id）{
返回customerRepository.findById（id）；
}
@凌驾
公共客户findByName（字符串名称）{
返回customerRepository.findByName（名称）；
}
}

您的方法定义为

return em.find(Customer.class, Name);

---

EntityManager.find（）

获取实体的ID，并返回具有该ID的实体。客户的ID是一个长字符串。这不是名字。您需要一个查询来实现

findByName（）

我遇到了这个问题，原因是我没有在模型中将“Name”指定为ID（主键）。结果，我作为Id传递的参数与该客户对象的系统生成Id（hjid）进行了比较，结果没有找到具有该系统生成Id（类型很长）的对象。因此，有必要在模型中明确指定所需的主键。

发布异常的堆栈跟踪。告诉我们它指的是哪一行。

customerService.findByName

的实现是什么？谢谢！通过使用普通的jpa条件查询修复了它，现在它可以正常工作了！：）

@Service("customerService")
@Transactional
public class CustomerServiceImpl implements CustomerService {

    @Autowired
    private CustomerRepository customerRepository;

    @Override
    public void save(Customer customer) {
        customerRepository.save(customer);
    }

    @Override
    public List<Customer> findAll() {
        return customerRepository.findAll();
    }

    @Override
    public Customer findById(Long id) {
        return customerRepository.findById(id);
    }

    @Override
    public Customer findByName(String Name) {
        return customerRepository.findByName(Name);
    }
}

return em.find(Customer.class, Name);