ParameterMappingInterceptor (Spring Framework 4.3.30.RELEASE API)

java.lang.Object
- org.springframework.web.portlet.handler.HandlerInterceptorAdapter
- - org.springframework.web.portlet.handler.ParameterMappingInterceptor

所有已实现的接口:
HandlerInterceptor
```
public class ParameterMappingInterceptor
extends HandlerInterceptorAdapter
```
Interceptor to forward a request parameter from the ActionRequest to the RenderRequest.
This can be useful when using ParameterHandlerMapping or PortletModeParameterHandlerMapping. It will ensure that the parameter that was used to map the ActionRequest to a handler will be forwarded to the RenderRequest so that it will also be mapped the same way.
When using this Interceptor, you can still change the value of the mapping parameter in your handler in order to change where the render request will get mapped.
Be aware that this Interceptor does call ActionResponse.setRenderParameter, which means that you will not be able to call ActionResponse.sendRedirect in your handler. If you may need to issue a redirect, then you should avoid this Interceptor and either write a different one that does this in a different way, or manually forward the parameter from within your handler(s).
Thanks to Rainer Schmitz for suggesting this mapping strategy!
从以下版本开始:
2.0
作者:
John A. Lewis
另请参阅:
ParameterHandlerMapping, PortletModeParameterHandlerMapping

字段概要
字段
修饰符和类型字段说明
static String DEFAULT_PARAMETER_NAME
Request parameter name to use for mapping to handlers

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

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
`boolean`	`preHandleAction(ActionRequest request, ActionResponse response, Object handler)`	If request is an `ActionRequest`, get handler mapping parameter and add it to the ActionResponse.
`void`	`setParameterName(String parameterName)`	Set the name of the parameter used for mapping.

从类继承的方法 org.springframework.web.portlet.handler.HandlerInterceptorAdapter
afterActionCompletion, afterCompletion, afterEventCompletion, afterRenderCompletion, afterResourceCompletion, postHandleRender, postHandleResource, preHandle, preHandleEvent, preHandleRender, preHandleResource

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
  - DEFAULT_PARAMETER_NAME
```
public static final String DEFAULT_PARAMETER_NAME
```
    Request parameter name to use for mapping to handlers
    另请参阅:
    常量字段值
- 构造器详细资料
  - ParameterMappingInterceptor
```
public ParameterMappingInterceptor()
```
- 方法详细资料
  - setParameterName
```
public void setParameterName(String parameterName)
```
    Set the name of the parameter used for mapping.
  - preHandleAction
```
public boolean preHandleAction(ActionRequest request,
                               ActionResponse response,
                               Object handler)
```
    If request is an ActionRequest, get handler mapping parameter and add it to the ActionResponse.
    指定者:
    preHandleAction 在接口中 HandlerInterceptor
    覆盖:
    preHandleAction 在类中 HandlerInterceptorAdapter
    参数:
    request - current portlet action request
    response - current portlet action response
    handler - chosen handler to execute, for type and/or instance evaluation
    返回:
    true if the execution chain should proceed with the next interceptor or the handler itself. Else, DispatcherPortlet assumes that this interceptor has already dealt with the response itself