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Java EE 5 SDK 深圳电信培训中心.徐海蛟老师. |
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javax.servlet.jsp.el Class Expression
java.lang.Objectjavax.servlet.jsp.el.Expression
Deprecated. As of JSP 2.1, replaced by
ValueExpression
public abstract class Expression
- extends Object
The abstract class for a prepared expression.
An instance of an Expression can be obtained via from an ExpressionEvaluator instance.
An Expression may or not have done a syntactic parse of the expression. A client invoking the evaluate() method should be ready for the case where ELParseException exceptions are raised.
- 从以下版本开始:
- JSP 2.0
| 构造器摘要 | |
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Expression()
Deprecated. |
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| 方法摘要 | |
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abstract Object |
evaluate(VariableResolver vResolver)
Deprecated. Evaluates an expression that was previously prepared. |
| 类方法继承 java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| 构造器详细信息 |
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Expression
public Expression()
- Deprecated.
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evaluate
public abstract Object evaluate(VariableResolver vResolver) throws ELException
- Deprecated.
- Evaluates an expression that was previously prepared. In some
implementations preparing an expression involves full syntactic
validation, but others may not do so. Evaluating the expression may
raise an ELParseException as well as other ELExceptions due to
run-time evaluation.
- 参数:
vResolver- A VariableResolver instance that can be used at runtime to resolve the name of implicit objects into Objects.- 返回:
- The result of the expression evaluation.
- 抛出异常:
ELException- Thrown if the expression evaluation failed.
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Java EE 5 SDK 深圳电信培训中心.徐海蛟老师. |
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| 上一个类 下一个类 | 框架 无框架 | ||||||||
| 摘要: 嵌套 | 字段 | 构造器 | 方法 | 详细信息: 字段 | 构造器 | 方法 | ||||||||
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