javax.servlet.jsp.el
接口 VariableResolver

所有已知实现类：

VariableResolverImpl

已过时。 As of JSP 2.1, replaced by ELResolver

public interface VariableResolver

This class is used to customize the way an ExpressionEvaluator resolves variable references at evaluation time. For example, instances of this class can implement their own variable lookup mechanisms, or introduce the notion of "implicit variables" which override any other variables. An instance of this class should be passed when evaluating an expression.

An instance of this class includes the context against which resolution will happen

从以下版本开始：

JSP 2.0

方法摘要

Object

resolveVariable(String pName) 已过时。 Resolves the specified variable.

方法详细信息

resolveVariable

Object resolveVariable(String pName)
                       throws ELException

已过时。

Resolves the specified variable. Returns null if the variable is not found.

参数：

pName - the name of the variable to resolve

返回：

the result of the variable resolution

抛出：

ELException - if a failure occurred while trying to resolve the given variable