java.lang.Object
- org.springframework.batch.item.ItemStreamSupport
- - org.springframework.batch.item.support.AbstractItemStreamItemReader<T>
  - - org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader<T>
    - - org.springframework.batch.item.data.AbstractPaginatedDataItemReader<T>

类型参数:
T - Type of item to be read
所有已实现的接口:
ItemReader<T>, ItemStream, ItemStreamReader<T>
直接已知子类:
AbstractNeo4jItemReader, MongoItemReader
```
public abstract class AbstractPaginatedDataItemReader<T>
extends AbstractItemCountingItemStreamItemReader<T>
```
A base class that handles basic reading logic based on the paginated semantics of Spring Data's paginated facilities. It also handles the semantics required for restartability based on those facilities.
从以下版本开始:
2.2
作者:
Michael Minella, Glenn Renfro

字段概要
字段
修饰符和类型字段说明
protected int page
protected int pageSize
protected java.util.Iterator<T> results

构造器概要
构造器
构造器说明
AbstractPaginatedDataItemReader()

方法概要

所有方法实例方法抽象方法具体方法
修饰符和类型	方法	说明
`protected void`	`doClose()`	Close the resources opened in `AbstractItemCountingItemStreamItemReader.doOpen()`.
`protected void`	`doOpen()`	Open resources necessary to start reading input.
`protected abstract java.util.Iterator<T>`	`doPageRead()`	Method this `ItemStreamReader` delegates to for the actual work of reading a page.
`protected T`	`doRead()`	Read next item from input.
`protected void`	`jumpToItem(int itemLastIndex)`	Move to the given item index.
`void`	`setPageSize(int pageSize)`	The number of items to be read with each page.

从类继承的方法 org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader
close, getCurrentItemCount, isSaveState, open, read, setCurrentItemCount, setMaxItemCount, setSaveState, update

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
  - page
```
protected volatile int page
```
  - pageSize
```
protected int pageSize
```
  - results
```
protected java.util.Iterator<T> results
```
- 构造器详细资料
  - AbstractPaginatedDataItemReader
```
public AbstractPaginatedDataItemReader()
```
- 方法详细资料
  - setPageSize
```
public void setPageSize(int pageSize)
```
    The number of items to be read with each page.
    参数:
    pageSize - the number of items. pageSize must be greater than zero.
  - doRead
```
protected T doRead()
            throws java.lang.Exception
```
    从类复制的说明: AbstractItemCountingItemStreamItemReader
    Read next item from input.
    指定者:
    doRead 在类中 AbstractItemCountingItemStreamItemReader<T>
    返回:
    an item or null if the data source is exhausted
    抛出:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework
  - doPageRead
```
protected abstract java.util.Iterator<T> doPageRead()
```
    Method this ItemStreamReader delegates to for the actual work of reading a page. Each time this method is called, the resulting Iterator should contain the items read within the next page.
    
    If the Iterator is empty or null when it is returned, this ItemReader will assume that the input has been exhausted.
    返回:
    an Iterator containing the items within a page.
  - doOpen
```
protected void doOpen()
               throws java.lang.Exception
```
    从类复制的说明: AbstractItemCountingItemStreamItemReader
    Open resources necessary to start reading input.
    指定者:
    doOpen 在类中 AbstractItemCountingItemStreamItemReader<T>
    抛出:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework
  - doClose
```
protected void doClose()
                throws java.lang.Exception
```
    从类复制的说明: AbstractItemCountingItemStreamItemReader
    Close the resources opened in AbstractItemCountingItemStreamItemReader.doOpen().
    指定者:
    doClose 在类中 AbstractItemCountingItemStreamItemReader<T>
    抛出:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework
  - jumpToItem
```
protected void jumpToItem(int itemLastIndex)
                   throws java.lang.Exception
```
    从类复制的说明: AbstractItemCountingItemStreamItemReader
    Move to the given item index. Subclasses should override this method if there is a more efficient way of moving to given index than re-reading the input using AbstractItemCountingItemStreamItemReader.doRead().
    覆盖:
    jumpToItem 在类中 AbstractItemCountingItemStreamItemReader<T>
    参数:
    itemLastIndex - index of item (0 based) to jump to.
    抛出:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework

修饰符和类型	字段	说明
`protected int`	`page`
`protected int`	`pageSize`
`protected java.util.Iterator<T>`	`results`

类 AbstractPaginatedDataItemReader<T>

字段概要

构造器概要

方法概要

从类继承的方法 org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader

从类继承的方法 org.springframework.batch.item.ItemStreamSupport

从类继承的方法 java.lang.Object

字段详细资料

page

pageSize

results

构造器详细资料

AbstractPaginatedDataItemReader

方法详细资料

setPageSize

doRead

doPageRead

doOpen

doClose

jumpToItem