bboss.org.apache.velocity.context

接口 Context

所有已知子接口:

InternalContextAdapter

所有已知实现类:

AbstractContext, ChainedInternalContextAdapter, EvaluateContext, Foreach.NullHolderContext, InternalContextAdapterImpl, ProxyVMContext, VelocityContext

public interface Context

Interface describing the application data context. This set of routines is used by the application to set and remove 'named' data object to pass them to the template engine to use when rendering a template. This is the same set of methods supported by the original Context class

另请参阅:

AbstractContext, VelocityContext

方法概要

限定符和类型	方法和说明
boolean	containsKey(java.lang.Object key) Indicates whether the specified key is in the context.
java.lang.Object	get(java.lang.String key) Gets the value corresponding to the provided key from the context.
java.lang.Object[]	getKeys() Get all the keys for the values in the context.
java.lang.Object	put(java.lang.String key, java.lang.Object value) Adds a name/value pair to the context.
java.lang.Object	remove(java.lang.Object key) Removes the value associated with the specified key from the context.

方法详细资料

put

java.lang.Object put(java.lang.String key,
                     java.lang.Object value)

Adds a name/value pair to the context.

参数:

key - The name to key the provided value with.

value - The corresponding value.

返回:

The old object or null if there was no old object.

get

java.lang.Object get(java.lang.String key)

Gets the value corresponding to the provided key from the context.

参数:

key - The name of the desired value.

返回:

The value corresponding to the provided key.

containsKey

boolean containsKey(java.lang.Object key)

Indicates whether the specified key is in the context.

参数:

key - The key to look for.

返回:

Whether the key is in the context.

getKeys

java.lang.Object[] getKeys()

Get all the keys for the values in the context.

返回:

All the keys for the values in the context.

remove

java.lang.Object remove(java.lang.Object key)

Removes the value associated with the specified key from the context.

参数:

key - The name of the value to remove.

返回:

The value that the key was mapped to, or null if unmapped.