在 JSF 1.2 或更新版本中创建 ActionListener 表达式:
FacesContext context = FacesContext.getCurrentInstance();
MethodExpression actionListener = context.getApplication().getExpressionFactory()
.createMethodExpression(context.getELContext(), "#{bean.actionListener}", null, new Class[] {ActionEvent.class});
uiCommandComponent.addActionListener(new MethodExpressionActionListener(actionListener));
为避免大量样板代码,您可以将其很好地包装在辅助方法中(如果需要,在辅助/实用程序类中),例如:
public static MethodExpression createAction(String actionExpression, Class<?> returnType) {
FacesContext context = FacesContext.getCurrentInstance();
return context.getApplication().getExpressionFactory()
.createMethodExpression(context.getELContext(), actionExpression, returnType, new Class[0]);
}
public static MethodExpressionActionListener createActionListener(String actionListenerExpression) {
FacesContext context = FacesContext.getCurrentInstance();
return new MethodExpressionActionListener(context.getApplication().getExpressionFactory()
.createMethodExpression(context.getELContext(), actionListenerExpression, null, new Class[] {ActionEvent.class}));
}
从 Adrian 提供的另一个 stackoverthread 获取 sn-p:
Deprecated richfaces javax.faces.el.MethodBinding replacement use