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📜  Primefaces Progrssbar

📅  最后修改于: 2021-01-08 04:45:42             🧑  作者: Mango

PrimeFaces ProgressBar

它是一个过程状态指示器，可以完全在客户端运行，也可以使用Ajax与服务器交互。用于显示执行过程的状态和进度。 ProgressBar有两种模式：客户端和Ajax。默认情况下，启用客户端模式。通过将ajax属性设置为true可以启用Ajax模式。

用于在JSF应用程序中创建进度条。它具有下表列出的各种属性。

ProgressBar属性

Attribute Default value Type Description
id null String It is an unique identifier of the component.
rendered true Boolean It is used to specify the rendering of the
component.
widgetVar null String It is a name of the client side widget.
value 0 Integer It is used to set value of the progress bar.
disabled false Boolean It is used to disable or enable the progressbar.
ajax false Boolean It specifies the mode of progressBar.
interval 3000 Integer It is used to set interval in seconds to do periodic requests in ajax mode.
style null String It is used to set inline style of the main container element.
styleClass null String It is used to set style class of the main container element.
labelTemplate {value} String It is used to set template of the progress label.
displayOnly false Boolean It enables static display mode.
global true Boolean Global ajax requests are listened by ajaxStatus
component.

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

// progressBar.xhtml





ProgressBar





Ajax ProgressBar Example

ManagedBean

// ProgressBar.java

package com.javatpoint;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;
@ManagedBean
@ViewScoped
public class ProgressBar {
private Integer progress;
public Integer getProgress() {
if(progress == null) {
progress = 0;
}
else {
progress = progress + (int)(Math.random() * 15);

if(progress > 100)
progress = 100;
}
return progress;
}
public void setProgress(Integer progress) {
this.progress = progress;
}
public void onComplete() {
FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Progress Completed"));
}
public void cancel() {
progress = null;
}
}

输出：