如何通過ajax渲染命令按鈕？它必須是動態的

Question

如何通過ajax渲染命令按鈕，使其名稱在單擊一次後從「開始」更改爲「停止」，然後再次單擊時再次單擊「開始」？

Answer 1

這可能是一個解決辦法：

XHTML代碼

<h:commandButton action="#{yourBackingBean.onBtnClick}" value="#{yourBackingBean.buttonValue}" id="btn"> 
    <f:ajax execute="btn" render="btn" /> 
</h:commandButton> 

MANAGEDBEAN CODE

public class YourBackingBean { 

    private String buttonValue; 

    public YourBackingBean() { 

     buttonValue = "start"; 
    } 

    public String onBtnClick() { 

     buttonValue = buttonValue.equals("start") ? "stop" : "start"; 
     return null; 
    } 

    public String getButtonValue() { 
     return buttonValue; 
    } 

    public void setButtonValue(String buttonValue) { 
     this.buttonValue = buttonValue; 
    } 
}