JobParameterExecutionContextCopyListener (Spring Batch 4.1.4.RELEASE API)

java.lang.Object
- org.springframework.batch.core.listener.StepExecutionListenerSupport
- - org.springframework.batch.core.listener.JobParameterExecutionContextCopyListener

所有已实现的接口:
StepExecutionListener, StepListener
```
public class JobParameterExecutionContextCopyListener
extends StepExecutionListenerSupport
```
This class can be used to automatically copy items from the JobParameters to the StepExecutionContext. A list of keys should be provided that correspond to the items in the StepExecutionContext that should be copied.
从以下版本开始:
2.0
作者:
Dave Syer

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

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`	`beforeStep(StepExecution stepExecution)`	Copy attributes from the `JobParameters` to the `StepExecutionContext`, if not already present.
`void`	`setKeys(java.lang.String[] keys)`

从类继承的方法 org.springframework.batch.core.listener.StepExecutionListenerSupport
afterStep

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
  - JobParameterExecutionContextCopyListener
```
public JobParameterExecutionContextCopyListener()
```
- 方法详细资料
  - setKeys
```
public void setKeys(java.lang.String[] keys)
```
    参数:
    keys - A list of keys corresponding to items in the JobParameters that should be copied.
  - beforeStep
```
public void beforeStep(StepExecution stepExecution)
```
    Copy attributes from the JobParameters to the StepExecutionContext, if not already present. The the key is already present we assume that a restart is in operation and the previous value is needed. If the provided keys are empty defaults to copy all keys in the JobParameters.
    指定者:
    beforeStep 在接口中 StepExecutionListener
    覆盖:
    beforeStep 在类中 StepExecutionListenerSupport
    参数:
    stepExecution - instance of StepExecution.