这里使用LGPL协议为例简单说明一下如何将自己的程序宣告为开源软件
首先确定自己要使用的开源协议，这里选择LGPL（关于其它协议及协议的详细内容，请参考其它资料）,
然后确定并准备以下几部分内容:
- 一份版权信息声明文件，一般命名为"NOTICE"
- 一份所使用的协议的副本.
- 如果程序为多个文件构成，则在每个文件中包含文件头信息，声明协议及版权信息
一般来说主要就是由以上几部分组成,下面简单说明一下相关组成部分。
1.首先，对于版权信息声明文件，我们可以写一份文本文档，一般命名为NOTICE, 其中包含版权声明及一些自己想要声明的信息，示例如：
Copyright 1998, 1999 Terry Jones
用于声明软件的发布年份及作者姓名，一般建议分别列出每个年份，不一定需要符号©， 最简单的NOTICE，包含这些内容就可以了。
但是一般建议应该包含以下一些信息：
a) 软件作者联系信息，用于在必要时联系作者
b) 获取软件源码的地址，当发布为二进制时，可以告诉用户在那里可以获得软件的源码。
c) 其它开源组件库的开源协议及源码地址，如果你所分发的软件使用了其它开源产品，则应该同时包含他们的开源协议以及相应的源码地址。
2. 一份软件的使用协议，这里我们使用LGPL(GNU Lesser General Public License)为例说明.
我们需要在（一般为软件所在的根目录下）包含这两个文件:
a) 一份GPL的协议副本，一般命名为COPYING， 你可以从这里获得相关的协议副本
http://www.gnu.org/licenses/gpl.txt
b) 一份LGPL协议副本，一般命名为COPYING.LESSER, 可以从这里获得相关的协议副本
http://www.gnu.org/licenses/lgpl.txt
如果软件发布在GPL下，则只需要一份GPL协议副本就可以，如果为LGPL则应该同时包含GPL及LGPL两个协议副本。
3.如果程序为多个文件源文件构成，则在每个文件中包含文件头信息，声明协议及版权信息.
来自gnu.org的示例文本如下：
This file is part of Foobar.
Foobar is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Foobar 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with Foobar. If not, see <http://www.gnu.org/licenses/>.
上面是以LGPL为例说明的. 更详细的信息可以参考这里 http://www.gnu.org/licenses/gpl-howto.html
下面是我的使用示例,以下信息仅供参考:
NOTICE文件如下
01 /*
02 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03 *
04 * Copyright 2010 huliqing, huliqing.cn@gmail.com
05 *
06 *
07 * QBlog is free software: you can redistribute it and/or modify
08 * it under the terms of the GNU Lesser General Public License as published by
09 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * QBlog is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with QBlog. If not, see <http://www.gnu.org/licenses/>.
19 *
20 * QBlog是一个自由软件，您可以自由分发、修改其中的源代码或者重新发布它，
21 * 新的任何修改后的重新发布版必须同样在遵守LGPL3或更后续的版本协议下发布.
22 * 关于LGPL协议的细则请参考COPYING、COPYING.LESSER文件，
23 * 您可以在QBlog的相关目录中获得LGPL协议的副本，
24 * 如果没有找到，请连接到 http://www.gnu.org/licenses/ 查看。
25 *
26 * - Author: Huliqing
27 * - Contact: huliqing.cn@gmail.com
28 * - License: GNU Lesser General Public License (LGPL)
29 * - Blog and source code availability: http://www.huliqing.name/
30 */
31
32
33 LICENSE INFORMATION REGARDING BUNDLED THIRD-PARTY SOFTWARE
34
35
36
37 The following third party software is distributed with the QBlog and is provided
38 under other
39 licenses and/or has source available from other locations.
40
41 * JSF Frameworker
42 License: CDDLv.1.0 + GPL v.2.0
43 Source code availability: https://javaserverfaces.dev.java.net/
44
45 lib/jsf-api.jar
46 lib/jsf-impl.jar
47
48 * Jakarta Taglibs
49
50 License: Apache License v. 2.0
51
52 Source code availability: http://jakarta.apache.org/taglibs/
53 lib/standard-1.1.2.jar
54
55 lib/jstl-1.1.2.jar
56
57 * DataNucleus Access Platform
58
59 License: Apache License v. 2.0
60
61 Source code availability: http://www.datanucleus.org/
62
63 lib/datanucleus-core-1.1.5.jar
64
65 lib/datanucleus-jpa-1.1.5.jar
66
67
68 * Xml
69 License: Apache License v. 2.0
70
71 Apache Software Foundation (http://xml.apache.org/commons)
72 David Megginson, Simple API for XML (http://www.saxproject.org)
73 World Wide Web Consortium, xml-commons for http://xml.apache.org/ subproject (http://www.w3c.org/DOM)
74 Sun Microsystems Inc., JSR 206, Java API for XML Processing 1.3(http://java.sun.com/xml/jaxp.html)
75 lib/xml-apis.jar
76 lib/xalan.jar
77 lib/xsltc.jar
78 lib/serializer.jar
79 lib/xercesImpl.jar
80
81 * el
82 JSP 2.1's EL API, as used by JSF 2.0
83 SUN (http://java.sun.com/products/jsp)
84 lib/el-api-1.1.jar
85 lib/el-impl-1.1.jar
86
87 * QFaces
88 License: LGPL v. 3.0
89 Source code availability: http://www.huliqing.name/
90 lib/qfaces-2.0.2.jar
91
92 * huliqing-common
93 No license and no source code, free use.
94 lib/huliqing-common-1.1.jar
95
96
97
98
文件头信息参考如下：
01 /*
02 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03 *
04 * Copyright 2010 huliqing, huliqing.cn@gmail.com
05 *
06 * This file is part of QBlog.
07 * QBlog is free software: you can redistribute it and/or modify
08 * it under the terms of the GNU Lesser General Public License as published by
09 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * QBlog is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with QBlog. If not, see <http://www.gnu.org/licenses/>.
19 *
20 * 这个文件是QBlog的一部分。
21 * 您可以单独使用或分发这个文件，但请不要移除这个头部声明信息.
22 * QBlog是一个自由软件，您可以自由分发、修改其中的源代码或者重新发布它，
23 * 新的任何修改后的重新发布版必须同样在遵守LGPL3或更后续的版本协议下发布.
24 * 关于LGPL协议的细则请参考COPYING、COPYING.LESSER文件，
25 * 您可以在QBlog的相关目录中获得LGPL协议的副本，
26 * 如果没有找到，请连接到 http://www.gnu.org/licenses/ 查看。
27 *
28 * - Author: Huliqing
29 * - Contact: huliqing.cn@gmail.com
30 * - License: GNU Lesser General Public License (LGPL)
31 * - Blog and source code availability: http://www.huliqing.name/
32 */
33
34 package name.huliqing.qblog;
35
36 import java.text.SimpleDateFormat;
37 import java.util.Date;
38 import java.util.TimeZone;
39 import java.util.logging.Logger;
40 import javax.servlet.ServletContextEvent;
41 import javax.servlet.ServletContextListener;
42 import name.huliqing.qblog.service.MailSe;
43
-44 public class ContextListener implements ServletContextListener {
45 private final static Logger logger = Logger.getLogger(ContextListener.class.getName());
46
-47 public void contextDestroyed(ServletContextEvent arg0) {
48 logger.info("QBlog Shutdown");
49 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
50 sdf.setTimeZone(TimeZone.getTimeZone("GMT+8"));
51 MailSe.sendToSelf("QBlog shutdown at:" + sdf.format(new Date()), "QBlog shutdown.");
52 }
53
-54 public void contextInitialized(ServletContextEvent arg0) {
55 logger.info("QBlog Start...");
56 }
57
58 }
59