FlatFileItemWriter (Spring Batch 4.1.4.RELEASE API)

java.lang.Object
- org.springframework.batch.item.ItemStreamSupport
- - org.springframework.batch.item.support.AbstractItemStreamItemWriter<T>
  - - org.springframework.batch.item.support.AbstractFileItemWriter<T>
    - - org.springframework.batch.item.file.FlatFileItemWriter<T>

所有已实现的接口:
ResourceAwareItemWriterItemStream<T>, ItemStream, ItemStreamWriter<T>, ItemWriter<T>, org.springframework.beans.factory.InitializingBean
```
public class FlatFileItemWriter<T>
extends AbstractFileItemWriter<T>
```
This class is an item writer that writes data to a file or stream. The writer also provides restart. The location of the output file is defined by a Resource and must represent a writable file.
Uses buffered writer to improve performance.
The implementation is not thread-safe.
作者:
Waseem Malik, Tomas Slanina, Robert Kasanicky, Dave Syer, Michael Minella, Mahmoud Ben Hassine

- 嵌套类概要
  - 从类继承的嵌套类/接口 org.springframework.batch.item.support.AbstractFileItemWriter
    AbstractFileItemWriter.OutputState

从类继承的字段 org.springframework.batch.item.support.AbstractFileItemWriter
append, DEFAULT_CHARSET, DEFAULT_LINE_SEPARATOR, DEFAULT_TRANSACTIONAL, lineSeparator, logger, shouldDeleteIfExists, state

构造器概要
构造器
构造器说明
FlatFileItemWriter()

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`	`afterPropertiesSet()`	Assert that mandatory properties (lineAggregator) are set.
`java.lang.String`	`doWrite(java.util.List<? extends T> items)`	Write out a string of items followed by a "new line", where the format of the new line separator is determined by the underlying operating system.
`void`	`setLineAggregator(LineAggregator<T> lineAggregator)`	Public setter for the `LineAggregator`.

从类继承的方法 org.springframework.batch.item.support.AbstractFileItemWriter
close, getOutputState, open, setAppendAllowed, setEncoding, setFooterCallback, setForceSync, setHeaderCallback, setLineSeparator, setResource, setSaveState, setShouldDeleteIfEmpty, setShouldDeleteIfExists, setTransactional, update, write

从类继承的方法 org.springframework.batch.item.ItemStreamSupport
getExecutionContextKey, setExecutionContextName, setName

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

- 字段详细资料
  - lineAggregator
```
protected LineAggregator<T> lineAggregator
```
- 构造器详细资料
  - FlatFileItemWriter
```
public FlatFileItemWriter()
```
- 方法详细资料
  - afterPropertiesSet
```
public void afterPropertiesSet()
                        throws java.lang.Exception
```
    Assert that mandatory properties (lineAggregator) are set.
    抛出:
    java.lang.Exception
    另请参阅:
    InitializingBean.afterPropertiesSet()
  - setLineAggregator
```
public void setLineAggregator(LineAggregator<T> lineAggregator)
```
    Public setter for the LineAggregator. This will be used to translate the item into a line for output.
    参数:
    lineAggregator - the LineAggregator to set
  - doWrite
```
public java.lang.String doWrite(java.util.List<? extends T> items)
```
    从类复制的说明: AbstractFileItemWriter
    Write out a string of items followed by a "new line", where the format of the new line separator is determined by the underlying operating system.
    指定者:
    doWrite 在类中 AbstractFileItemWriter<T>
    参数:
    items - to be written
    返回:
    written lines