CancelButton Component

cancelButtonComponent.component

<apex:component controller="CancelButtonController" id="cancelButtonComponent">
  <apex:attribute name="cancelButtonLabel" type="String" assignTo="{!prmCancelButtonLabel}" description="cancelButtonLabel" />
  <apex:attribute name="returnUrl" type="PageReference" assignTo="{!prmReturnUrl}" description="returnUrl" />
  <apex:attribute name="reRenderArea" type="String" description="reRenderArea" />
  <apex:commandButton value="{!prmCancelButtonLabel}" title="{!prmCancelButtonLabel}" action="{!doReturn}" reRender="{!reRenderArea}" id="cancelButton" />
</apex:component>

CancelButtonController.cls

public with sharing class CancelButtonController {
    
    public String prmCancelButtonLabel {get; set;}
    public PageReference prmReturnUrl {get; set;}
    
    private static final PageReference DEFAULT_URL = new PageReference('/home/home.jsp');
    
    /*
     * コンストラクタ
     * @param    : なし
     * @return   : なし
     */
    public CancelButtonController() {
        this.prmCancelButtonLabel = '';
        this.prmReturnUrl = null;
    }
    
    /*
     * 前ページ遷移
     * @param    : なし
     * @return   : 遷移先URL
     */
    public PageReference doReturn() {
        return getReturnUrl(this.prmReturnUrl);
    }
    
    /*
     * 遷移先URL取得
     * @param    : 前ページURL        [prmReturnUrl]
     * @return   : 遷移先URL
     */
    private PageReference getReturnUrl(PageReference prmReturnUrl) {
        return prmReturnUrl == null ? DEFAULT_URL : prmReturnUrl;
    }
}