這里使用LGPL協議為例簡單說明一下如何將自己的程序宣告為開源軟件
首先確定自己要使用的開源協議，這里選擇LGPL（關于其它協議及協議的詳細內容，請參考其它資料）,
然后確定并準備以下幾部分內容:
- 一份版權信息聲明文件，一般命名為"NOTICE"
- 一份所使用的協議的副本.
- 如果程序為多個文件構成，則在每個文件中包含文件頭信息，聲明協議及版權信息
一般來說主要就是由以上幾部分組成,下面簡單說明一下相關組成部分。
1.首先，對于版權信息聲明文件，我們可以寫一份文本文檔，一般命名為NOTICE, 其中包含版權聲明及一些自己想要聲明的信息，示例如：
Copyright 1998, 1999 Terry Jones
用于聲明軟件的發布年份及作者姓名，一般建議分別列出每個年份，不一定需要符號©， 最簡單的NOTICE，包含這些內容就可以了。
但是一般建議應該包含以下一些信息：
a) 軟件作者聯系信息，用于在必要時聯系作者
b) 獲取軟件源碼的地址，當發布為二進制時，可以告訴用戶在那里可以獲得軟件的源碼。
c) 其它開源組件庫的開源協議及源碼地址，如果你所分發的軟件使用了其它開源產品，則應該同時包含他們的開源協議以及相應的源碼地址。
2. 一份軟件的使用協議，這里我們使用LGPL(GNU Lesser General Public License)為例說明.
我們需要在（一般為軟件所在的根目錄下）包含這兩個文件:
a) 一份GPL的協議副本，一般命名為COPYING， 你可以從這里獲得相關的協議副本
http://www.gnu.org/licenses/gpl.txt
b) 一份LGPL協議副本，一般命名為COPYING.LESSER, 可以從這里獲得相關的協議副本
http://www.gnu.org/licenses/lgpl.txt
如果軟件發布在GPL下，則只需要一份GPL協議副本就可以，如果為LGPL則應該同時包含GPL及LGPL兩個協議副本。
3.如果程序為多個文件源文件構成，則在每個文件中包含文件頭信息，聲明協議及版權信息.
來自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為例說明的. 更詳細的信息可以參考這里 http://www.gnu.org/licenses/gpl-howto.html
下面是我的使用示例,以下信息僅供參考:
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是一個自由軟件，您可以自由分發、修改其中的源代碼或者重新發布它，
21 * 新的任何修改后的重新發布版必須同樣在遵守LGPL3或更后續的版本協議下發布.
22 * 關于LGPL協議的細則請參考COPYING、COPYING.LESSER文件，
23 * 您可以在QBlog的相關目錄中獲得LGPL協議的副本，
24 * 如果沒有找到，請連接到 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
文件頭信息參考如下：
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 * 這個文件是QBlog的一部分。
21 * 您可以單獨使用或分發這個文件，但請不要移除這個頭部聲明信息.
22 * QBlog是一個自由軟件，您可以自由分發、修改其中的源代碼或者重新發布它，
23 * 新的任何修改后的重新發布版必須同樣在遵守LGPL3或更后續的版本協議下發布.
24 * 關于LGPL協議的細則請參考COPYING、COPYING.LESSER文件，
25 * 您可以在QBlog的相關目錄中獲得LGPL協議的副本，
26 * 如果沒有找到，請連接到 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