那些遇到过的问题

测试时为类提供了错误类型的 id

Ru *_* Ru 6 java spring hibernate jpa spring-mvc

我在测试时遇到了这个问题 - 为类提供了错误类型的 idcom.myapp.ibank.domain.Customer. Expected: class java.lang.Long, got class java.lang.String

老实说，我不明白为什么我会得到这个以及到底发生了什么。当我正常使用它时，比如在本地tomcat上运行并通过控制器保存然后服务，它工作得很好。没有错误。这种行为对我来说毫无意义。

我正在使用 JPA 2.1 和 Hibernate 作为提供程序。

这是测试代码：

@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);
    }

}
Run Code Online (Sandbox Code Playgroud)

我的客户实体（简短版本）：

@Entity
@DynamicUpdate
@Table(name = "customer")
public class Customer implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String firstName;
    private String lastName;
    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "customer")
    //@JoinColumn(name="account_id", referencedColumnName="id")
    @Nullable
    @JsonManagedReference
    private List<Account> Accounts = new ArrayList<Account>();
    //private Address Address;


    public Customer() {
    }

    public Customer(String firstName, String lastName,  List<Account> accounts) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.Accounts = accounts;
    }
Run Code Online (Sandbox Code Playgroud)

还有我的仓库：

@Repository("customerRepository")
public class CustomerRepositoryImpl implements CustomerRepository {

    @PersistenceContext
    private EntityManager em;


    @Override
    @Transactional
    @NotNull
    public void save(Customer customer) {
        em.persist(customer);
        em.flush();
    }

    @Override
    public Customer findByName(String Name) {
    return em.find(Customer.class, Name);
    }
}
Run Code Online (Sandbox Code Playgroud)

我错过了什么，或者这是一个无法避免的休眠常见错误？我在某处读到这是一个典型的错误。

完整的堆栈跟踪：

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
Run Code Online (Sandbox Code Playgroud)

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);
    }
}
Run Code Online (Sandbox Code Playgroud)

JB *_*zet 6

你的方法定义为

return em.find(Customer.class, Name);
Run Code Online (Sandbox Code Playgroud)

EntityManager.find()获取实体的 ID，并返回具有该 ID 的实体。客户的 ID 是一个长整型。这不是名字。您需要一个查询来实现findByName()。

归档时间：

查看次数：

19714 次

最近记录：

3 年 前
相关归档
突出显示IntelliJ IDEA中的异常抛出器 77
练习提高我的Java编程技巧 63
无法在Spring Webservice中的START_ARRAY标记中反序列化对象的实例 57
信息:没有在类路径上检测到Spring WebApplicationInitializer类型 32
JPA:@Embeddable对象如何获取对其所有者的引用？ 10
IntelliJ 中未找到应用服务器库 7
Hibernate:在@Formula注释中使用HQL？ 6
Hibernate Envers - 显示修订之间的差异 5
Springs SimpleUrlHandlerMapping 未映射我的控制器 4
Spring MVC 3.0基本身份验证实现 3
难疑归档
堆栈和堆的内容和位置是什么？ 7847
如何在Git中克隆所有远程分支？ 3987
我应该在MySQL中使用日期时间或时间戳数据类型吗？ 2598
按字符串属性值对对象数组进行排序 2535
在GitHub上使用https://时有没有办法跳过密码输入？ 1806
如何生成随机字母数字字符串？ 1679
选择每个GROUP BY组中的第一行？ 1205
创建一个带参数的Bash别名？ 1164
如何在PHP中获取客户端IP地址 1123
如何撤消git reset --hard HEAD~1？ 1083