java.lang.Object
- org.springframework.batch.core.listener.ItemListenerSupport<I,O>

所有已实现的接口:
ItemProcessListener<I,O>, ItemReadListener, ItemWriteListener<O>, StepListener
直接已知子类:
DefaultItemFailureHandler
```
public class ItemListenerSupport<I,O>
extends java.lang.Object
implements ItemReadListener, ItemProcessListener<I,O>, ItemWriteListener<O>
```
Basic no-op implementation of the ItemReadListener, ItemProcessListener, and ItemWriteListener interfaces. All are implemented, since it is very common that all may need to be implemented at once.
作者:
Lucas Ward, Mahmoud Ben Hassine

构造器概要
构造器
构造器说明
ItemListenerSupport()

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`void`	`afterProcess(I item, O result)`	Called after `ItemProcessor.process(Object)` returns.
`void`	`afterRead(I item)`	Called after `ItemReader.read()`.
`void`	`afterWrite(java.util.List<? extends O> item)`	Called after `ItemWriter.write(java.util.List)` This will be called before any transaction is committed, and before `ChunkListener.afterChunk(ChunkContext)`
`void`	`beforeProcess(I item)`	Called before `ItemProcessor.process(Object)`.
`void`	`beforeRead()`	Called before `ItemReader.read()`
`void`	`beforeWrite(java.util.List<? extends O> item)`	Called before `ItemWriter.write(java.util.List)`
`void`	`onProcessError(I item, java.lang.Exception e)`	Called if an exception was thrown from `ItemProcessor.process(Object)`.
`void`	`onReadError(java.lang.Exception ex)`	Called if an error occurs while trying to read.
`void`	`onWriteError(java.lang.Exception ex, java.util.List<? extends O> item)`	Called if an error occurs while trying to write.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
 - ItemListenerSupport
```
public ItemListenerSupport()
```
- 方法详细资料
 - afterRead
```
public void afterRead(I item)
```
 从接口复制的说明: ItemReadListener
 Called after ItemReader.read(). This method is called only for actual items (ie it is not called when the reader returns null).
 指定者:
 afterRead 在接口中 ItemReadListener
 参数:
 item - returned from read()
 - beforeRead
```
public void beforeRead()
```
 从接口复制的说明: ItemReadListener
 Called before ItemReader.read()
 指定者:
 beforeRead 在接口中 ItemReadListener
 - onReadError
```
public void onReadError(java.lang.Exception ex)
```
 从接口复制的说明: ItemReadListener
 Called if an error occurs while trying to read.
 指定者:
 onReadError 在接口中 ItemReadListener
 参数:
 ex - thrown from ItemWriter
 - afterProcess
```
public void afterProcess(I item,
 @Nullable
 O result)
```
 从接口复制的说明: ItemProcessListener
 Called after ItemProcessor.process(Object) returns. If the processor returns null, this method will still be called, with a {code null} result, allowing for notification of 'filtered' items.
 指定者:
 afterProcess 在接口中 ItemProcessListener<I,O>
 参数:
 item - to be processed
 result - of processing
 - beforeProcess
```
public void beforeProcess(I item)
```
 从接口复制的说明: ItemProcessListener
 Called before ItemProcessor.process(Object).
 指定者:
 beforeProcess 在接口中 ItemProcessListener<I,O>
 参数:
 item - to be processed.
 - onProcessError
```
public void onProcessError(I item,
 java.lang.Exception e)
```
 从接口复制的说明: ItemProcessListener
 Called if an exception was thrown from ItemProcessor.process(Object).
 指定者:
 onProcessError 在接口中 ItemProcessListener<I,O>
 参数:
 item - attempted to be processed
 e - - exception thrown during processing.
 - afterWrite
```
public void afterWrite(java.util.List<? extends O> item)
```
 从接口复制的说明: ItemWriteListener
 Called after ItemWriter.write(java.util.List) This will be called before any transaction is committed, and before ChunkListener.afterChunk(ChunkContext)
 指定者:
 afterWrite 在接口中 ItemWriteListener
 参数:
 item - written items
 - beforeWrite
```
public void beforeWrite(java.util.List<? extends O> item)
```
 从接口复制的说明: ItemWriteListener
 Called before ItemWriter.write(java.util.List)
 指定者:
 beforeWrite 在接口中 ItemWriteListener
 参数:
 item - to be written
 - onWriteError
```
public void onWriteError(java.lang.Exception ex,
 java.util.List<? extends O> item)
```
 从接口复制的说明: ItemWriteListener
 Called if an error occurs while trying to write. Will be called inside a transaction, but the transaction will normally be rolled back. There is no way to identify from this callback which of the items (if any) caused the error.
 指定者:
 onWriteError 在接口中 ItemWriteListener
 参数:
 ex - thrown from ItemWriter
 item - attempted to be written.

类 ItemListenerSupport<I,​O>

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

ItemListenerSupport

方法详细资料

afterRead

beforeRead

onReadError

afterProcess

beforeProcess

onProcessError

afterWrite

beforeWrite

onWriteError

类 ItemListenerSupport<I,O>