1
此異常:java.lang.IllegalStateException:這種處理程序不能連接到多個組件
java.lang.IllegalStateException: this kind of handler cannot be attached to multiple components; it is already attached to component [MarkupContainer [Component id = textField1]], but component [MarkupContainer [Component id = textField2]] wants to be attached too
at org.apache.wicket.behavior.AbstractAjaxBehavior.bind(AbstractAjaxBehavior.java:70)
at org.apache.wicket.Component.add(Component.java:973)
at info.ems.wicket.page.HomePage.<init>(HomePage.java:23)
通過下面的代碼拋出:
public class HomePage extends MasterPage {
public HomePage() {
AjaxEventBehavior ajaxOnClickBehavior = new AjaxEventBehavior("onClick") {
private static final long serialVersionUID = 1L;
@Override
protected void onEvent(AjaxRequestTarget target) {
// Same behavior of both the textField1 and textField2
}
};
add(new TextField<String>("textField1", new Model<String>("Text Field 1")).add(ajaxOnClickBehavior));
add(new TextField<String>("textField2", new Model<String>("Text Field 2")).add(ajaxOnClickBehavior));
}
}
但是,這是好的:
public class HomePage extends MasterPage {
public HomePage() {
add(new TextField<String>("textField1", new Model<String>("Text Field 1")).add(new AjaxEventBehavior("onClick") {
private static final long serialVersionUID = 1L;
@Override
protected void onEvent(AjaxRequestTarget target) {
// Behavior of textField1, same as textField2
}
}));
add(new TextField<String>("textField2", new Model<String>("Text Field 2")).add(new AjaxEventBehavior("onClick") {
private static final long serialVersionUID = 1L;
@Override
protected void onEvent(AjaxRequestTarget target) {
// Behavior of textField2, same as textField1
}
}));
}
}
爲什麼?
謝謝。
補充:
public class HomePage extends MasterPage {
public HomePage() {
add(new TextField<String>("textField1", new Model<String>("Text Field 1")).add(new AjaxOnClickBehavior("onClick")));
add(new TextField<String>("textField2", new Model<String>("Text Field 2")).add(new AjaxOnClickBehavior("onClick")));
}
private class AjaxOnClickBehavior extends AjaxEventBehavior {
private static final long serialVersionUID = 1L;
public AjaxOnClickBehavior(String event) {
super(event);
}
@Override
protected void onEvent(AjaxRequestTarget target) {
// Same behavior of both the textField1 and textField2
}
}
}
或者甚至更好,如果您多次使用一個類,請將其轉換爲命名的內部類而不是匿名類。 – biziclop 2011-06-07 17:43:31
@biziclop我已經添加了一個代碼。這是你提到的「命名的內部類而不是匿名的」嗎? – 2011-06-07 17:57:35
@Tapas這正是他的意思。 – Marcelo 2011-06-07 18:31:02