samples/xml/cas/cassample/src/main/java/org/springframework/security/samples/cas/web/ProxyTicketSampleServlet.java
@Override
	public void init() throws ServletException {
		super.init();
		String casServiceHost = System.getProperty("cas.service.host", "localhost:8443");
		targetUrl = "https://" + casServiceHost + "/cas-sample/secure/";
	}
@Override
	public void init() throws ServletException {
		super.init();
		String casServiceHost = System.getProperty("cas.service.host", "localhost:8443");
		targetUrl = "https://" + casServiceHost + "/cas-sample/secure/";
	}
Initialize the target URL. It allows for the host to change based upon the
"cas.service.host" system property. If the property is not set, the default is
"localhost:8443".