create MethodBinding MethodExpression ValueExpression

关键字 : methodbinding methodexpression valueexpression

 

1. create MethodBinding

         MethodBinding methodBinding = FacesContext.getCurrentInstance().getApplication().createMethodBinding("#{bean.method}", null); 

2. create MethodExpression
        ExpressionFactory expFactory = FacesContext.getCurrentInstance(). getApplication().getExpressionFactory(); ELContext elContext = FacesContext.getCurrentInstance().getELContext(); MethodExpression expression = expFactory.createMethodExpression(elContext, "actionName", String.class, new Class[]{}); commandComponent.setActionExpression(expression); 

3. create ValueExpression
  ValueExpression valueExpression = expFactory.createValueExpression(elContext, "#{bean.value}", String.class);