EntityExistsException (Java EE 5)

Java EE API

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javax.persistence Class EntityExistsException

java.lang.Object
  extended by java.lang.Throwable
      extended by java.lang.Exception
          extended by java.lang.RuntimeException
              extended by javax.persistence.PersistenceException
                  extended by javax.persistence.EntityExistsException
All Implemented Interfaces:
Serializable
public class EntityExistsException
extends PersistenceException

Extends: Throwable > Exception > RuntimeException > PersistenceException

当 EntityManager.persist(Object) 被调用并且此实体已存在时，持久性提供者将抛出此异常。当前事务（如果存在活动的事务）将标记为回滚。
since
en
Java Persistence 1.0
See also persist(Object)
英文文档：

Thrown by the persistence provider when EntityManager.persist(Object) is called and the entity already exists. The current transaction, if one is active, will be marked for rollback.

Since:
Java Persistence 1.0
See Also:
EntityManager.persist(Object), Serialized Form

Constructor Summary
EntityExistsException()
          Constructs a new EntityExistsException exception with null as its detail message.
EntityExistsException(String message)
          Constructs a new EntityExistsException exception with the specified detail message.
EntityExistsException(String message, Throwable cause)
          Constructs a new EntityExistsException exception with the specified detail message and cause.
EntityExistsException(Throwable cause)
          Constructs a new EntityExistsException exception with the specified cause.
 
Method Summary
 
Methods inherited from class java.lang.Throwable
fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

public EntityExistsException()
构造详细消息为 null 的新 EntityExistsException 异常。
英文文档：

EntityExistsException

public EntityExistsException()
Constructs a new EntityExistsException exception with null as its detail message.

public EntityExistsException(String message)
构造带指定详细消息的新 EntityExistsException 异常。
message 详细消息。
英文文档：

EntityExistsException

public EntityExistsException(String message)
Constructs a new EntityExistsException exception with the specified detail message.

Parameters:
message - the detail message.

public EntityExistsException(String message, Throwable cause)
构造带指定详细消息和原因的新 EntityExistsException 异常。
message 详细消息。
cause 原因。
英文文档：

EntityExistsException

public EntityExistsException(String message,
                             Throwable cause)
Constructs a new EntityExistsException exception with the specified detail message and cause.

Parameters:
message - the detail message.
cause - the cause.

public EntityExistsException(Throwable cause)
构造带指定原因的新 EntityExistsException 异常。
cause 原因。
英文文档：

EntityExistsException

public EntityExistsException(Throwable cause)
Constructs a new EntityExistsException exception with the specified cause.

Parameters:
cause - the cause.

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