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📜  Primefaces CommandLink

📅  最后修改于: 2021-01-08 04:27:51             🧑  作者: Mango

PrimeFaces CommandLink

它是带有Ajax，部分处理和确认功能的JSF h：commandLink的扩展版本。它用于创建将控制重定向到指定目标的链接。

组件用于在JSF应用程序中创建链接。它具有下表列出的各种属性。

CommandLink属性

Attribute Default value Type Description
id null String Unique identifier of the component
value null String Href value of the rendered anchor.
action null MethodExpr/
String 		A method expression or a String outcome that’d be
processed when link is clicked.
async false Boolean When set to true, ajax requests are not queued.
process null String Component(s) to process partially instead of whole
view.
ajax true Boolean Specifies the submit mode, when set to true(default),
submit would be made with Ajax.
update null String Component(s) to be updated with ajax.
global true Boolean Defines whether to trigger ajaxStatus or not.
resetValues false Boolean If true, local values of input components to be updated
within the ajax request would be reset.
timeout 0 Integer Timeout for the ajax request in milliseconds.
type null String Type of resource referenced by the link.
form null String Form to serialize for an ajax request. Default is the
enclosing form.

例

在下面的示例中，我们正在实现组件。本示例包含以下文件。

JSF文件

// commandLink.xhtml





CommandLink




CommandLink Example

ManagedBean

// CommandLink.java

package com.javatpoint;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
@ManagedBean
public class CommandLink {
public void buttonAction(ActionEvent actionEvent) {
addMessage("You just clicked a link");
}
public void addMessage(String summary) {
FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, summary,  null);
FacesContext.getCurrentInstance().addMessage(null, message);
}
}

输出：