demobean.java

来自「OperaMasks是一种基于J2EE的Web开发技术」· Java 代码 · 共 208 行

/*
 * $Id: DemoBean.java,v 1.2 2008/07/25 10:13:08 libin Exp $
 *
 * Copyright (C) 2006 Operamasks Community.
 * Copyright (C) 2000-2006 Apusic Systems, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see http://www.gnu.org/licenses.
 */
package demo;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;

import org.operamasks.faces.annotation.EventListener;
import org.operamasks.faces.annotation.ListEntries;
import org.operamasks.faces.annotation.ManagedBean;
import org.operamasks.faces.annotation.ManagedBeanScope;
import org.operamasks.faces.annotation.ManagedProperty;
import org.operamasks.faces.annotation.MapEntries;
import org.operamasks.faces.annotation.MapEntry;
import org.operamasks.faces.annotation.SaveState;

@ManagedBean(scope = ManagedBeanScope.REQUEST)
public class DemoBean implements java.io.Serializable {
	private static final long serialVersionUID = 1L;

	/*
	 * 使用@ManagedProperty来定义并初始化一个ManagedBean属性。利用此方法可以
	 * 方便地声明一个属性而不必定义get和set方法，属性的初始值可以来自于EL表达式。
	 */
	@ManagedProperty(value = "#{ColorBean}")
	private ColorBean color;

	/*
	 * 注意，color属性是只读的，这是由于只定义了get方法而没有定义set方法，但 初始值仍会被注入。
	 */
	public ColorBean getColor() {
		return color;
	}

	/* 使用@ListEntries的例子 */
	@ListEntries( { "Sun", "Mon", "Tue", "Wen", "Thu", "Fri", "Sat" })
	private String[] dates;

	/* 使用@MapEntries的例子 */
	@MapEntries( { @MapEntry(key = "red", value = "#ff0000"),
			@MapEntry(key = "green", value = "#00ff00"),
			@MapEntry(key = "blue", value = "#0000ff") })
	private Map<String, String> colorMap;

	/* 与stateless session bean互相传递数据 */
	@ManagedProperty
	private String name;
	@ManagedProperty
	private String greeting;

	@ManagedProperty
	private Integer number;

	@ManagedProperty
	private Date date;

	@ManagedProperty
	private String dateString;

	@ManagedProperty
	private int width = 200;

	@ManagedProperty
	private String format = "Y/m/d";

	@ManagedProperty
	private boolean richForm;

	public String delay() {
		try {
			Thread.sleep(2000);
		} catch (Exception e) {
		}
		return null;
	}

	@SaveState
	private int clickCount;

	private String clickText;

	public String getClickText() {
		return clickText == null ? "Click Me" : clickText;
	}

	public String click() {
		clickCount++;
		clickText = "You clicked me " + clickCount + " times";
		return null;
	}

	private int clickCount2;
	private String clickText2;

	public String getClickText2() {
		return clickText2 == null ? "Click Me" : clickText2;
	}

	public String click2(Map<String, String> params) {
		clickCount2++;
		clickText2 = String.format("Hello, %s. You clicked me %d times", params
				.get("name"), clickCount2);
		return null;
	}

	private String skin = null;

	public String getSkin() {
		if (this.skin == null) {
			FacesContext context = FacesContext.getCurrentInstance();
			Cookie cookie = (Cookie) context.getExternalContext()
					.getRequestCookieMap().get("skin");
			if (cookie != null)
				skin = cookie.getValue();
			if (skin == null)
				skin = "classic";
		}
		return skin;
	}

	public void setSkin(String skin) {
		this.skin = skin;
	}

	public String chooseSkin() {
		try {
			FacesContext context = FacesContext.getCurrentInstance();
			ExternalContext extctx = context.getExternalContext();
			extctx.getSessionMap().put("com.apusic.faces.widget.SKIN",
					this.skin);

			HttpServletResponse response = (HttpServletResponse) extctx
					.getResponse();
			Cookie cookie = new Cookie("skin", this.skin);
			cookie.setMaxAge(30 * 86400);
			response.addCookie(cookie);
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return null;
	}

	@Resource(name = "foo")
	private String foo;

	@PostConstruct
	private void init() {
		System.out.println("DemoBean initialized...");
		System.out.println("Injected resource: " + foo);
	}

	public void dateToString() {
		if (date == null) {
			dateString = "";
			return;
		}

		SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd");
		dateString = format.format(date);
	}

	public void stringToDate() {
		if (dateString == null || "".equals(dateString)) {
			date = null;
			return;
		}

		SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd");
		try {
			date = format.parse(dateString);
		} catch (ParseException e) {
			dateString = "Illegal date format. You should input a string which's format is yyyy/MM/dd.";
		}
	}

	@EventListener
	public String showResponse(String response) {
		this.greeting = response;
		return null;
	}
}