问题的提出：
默认Tapestry的页面模板文件（.html）及其对应的规范文件(.page)，可以放在web根目录或其下的WEB -INF/目录中，Tapestry可以不用任何配置（在以前的版本中需要在.application文件中定义一下页面）就能正确运行，如果你需要在这些根目录下以文件系统的目录形式组织你的页面，则Tapestry是不会自动搜索这些子目录的，你必须在.application文件中定义这些不在默认位置的页面。这样一来，每加一个页面都需要定义一下，如果页面数目众多，定义起来就会比较麻烦，如何才能避免这些配置呢？本文的目的就是尝试解决这个问题。
问题的解决：
本文是在参考文档（http://www.behindthesite.com/blog/C1931765677/E381917869/index.html）源代码的基础上稍作修改而成，主要是为了解决不能在Tomcat中使用的问题。为了更好的了解，朋友们最好能阅读一下原文和原来的代码。主要修改的地方是给RecursiveFileLocator传递一个真实路径地址，以便能够列出目录下面的子目录，从而实现层次查找。
解决的途径就是定义一个ISpecificationResolverDelegate，以便Tapestry在常规路径下找不到文件时进行处理。
CustomSpecificationResolver.java:
1.
2. // CustomSpecificationResolver.java
3. //
4. // Copyright 2004 Michael J. Henderson & Associates LLC
5. //
6. // Licensed under the Apache License, Version 2.0 (the "License");
7. // you may not use this file except in compliance with the License.
8. // You may obtain a copy of the License at
9. //
10. // http://www.apache.org/licenses/LICENSE-2.0
11. //
12. // Unless required by applicable law or agreed to in writing, software
13. // distributed under the License is distributed on an "AS IS" BASIS,
14. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15. // See the License for the specific language governing permissions and
16. // limitations under the License.
17.
18. package com.mjhenderson.users.tapestry;
19.
20. import org.apache.commons.logging.Log;
21. import org.apache.commons.logging.LogFactory;
22. import org.apache.tapestry.INamespace;
23. import org.apache.tapestry.IRequestCycle;
24. import org.apache.tapestry.IResourceLocation;
25. import org.apache.tapestry.Tapestry;
26. import org.apache.tapestry.engine.ISpecificationSource;
27. import org.apache.tapestry.resolver.ISpecificationResolverDelegate;
28. import org.apache.tapestry.spec.IComponentSpecification;
29.
30. /**
31. * @author <a href="mailto:michaelh@mjhenderson.com?subject=com.mjhenderson.users.tapestry.CustomSpecificationResolver">Mike Henderson</a>
32. *
33. */
34. public class CustomSpecificationResolver implements
35. ISpecificationResolverDelegate {
36.
37.
38. private static final Log LOG = LogFactory.getLog(RecursiveFileLocator.class);
39.
40. private ISpecificationSource _specificationSource;
41.
42. private RecursiveFileLocator _locator;
43. //private boolean _applicationIsExplodedWAR;
44. private boolean _initialized;
45. private String _folder;
46. private String _realRootFolder;
47.
48. public CustomSpecificationResolver() {;
49. }
50.
51. public void setFolder(String value) {
52. _folder = value;
53. }
54.
55. public String getFolder() {
56. return _folder;
57. }
58.
59. private void _init(IRequestCycle cycle) {
60. //IResourceLocation rootLocation = Tapestry.getApplicationRootLocation(cycle).getRelativeLocation("/WEB-INF/");
61. IResourceLocation rootLocation = Tapestry.getApplicationRootLocation(cycle).getRelativeLocation("/");
62. //_applicationIsExplodedWAR = rootLocation.getResourceURL().toString().startsWith("file:");
63. //if (_applicationIsExplodedWAR) {
64. _realRootFolder = cycle.getRequestContext().getServlet().getServletContext().getRealPath("/");
65. _locator = new RecursiveFileLocator(rootLocation,_realRootFolder);
66. _specificationSource = cycle.getEngine().getSpecificationSource();
67. //}
68. _initialized = true;
69. }
70.
71. // private boolean checkLocationIsFileLocation(IResourceLocation location) {
72. // String url = location.getResourceURL().toString();
73. // System.out.println("url = "+url);
74. // return url.startsWith("file:");
75. // }
76.
77. /**
78. * @see org.apache.tapestry.resolver.ISpecificationResolverDelegate#findPageSpecification(org.apache.tapestry.IRequestCycle, org.apache.tapestry.INamespace, java.lang.String)
79. */
80. public IComponentSpecification findPageSpecification(IRequestCycle cycle,
81. INamespace namespace, String name) {
82.
83. if (!_initialized) {
84. _init(cycle);
85. }
86. //if (!_applicationIsExplodedWAR) {
87. // return null;
88. //}
89. IResourceLocation location = _locator.resolveLocation(name+".page");
90. if (location != null) {
91. return _specificationSource.getPageSpecification(location);
92. }
93. return null;
94. }
95.
96. /**
97. * @see org.apache.tapestry.resolver.ISpecificationResolverDelegate#findComponentSpecification(org.apache.tapestry.IRequestCycle, org.apache.tapestry.INamespace, java.lang.String)
98. */
99. public IComponentSpecification findComponentSpecification(
100. IRequestCycle cycle, INamespace namespace, String type) {
101.
102. if (!_initialized) {
103. _init(cycle);
104. }
105. //if (!_applicationIsExplodedWAR) {
106. // return null;
107. //}
108. IResourceLocation location = _locator.resolveLocation(type+".jwc");
109. if (location != null) {
110. return _specificationSource.getComponentSpecification(location);
111. }
112. return null;
113. }
114.
115. }
116.
RecursiveFileLocator.java:
1.
2. // RecursiveFileLocator.java
3. //
4. // Copyright 2004 Michael J. Henderson & Associates LLC
5. //
6. // Licensed under the Apache License, Version 2.0 (the "License");
7. // you may not use this file except in compliance with the License.
8. // You may obtain a copy of the License at
9. //
10. // http://www.apache.org/licenses/LICENSE-2.0
11. //
12. // Unless required by applicable law or agreed to in writing, software
13. // distributed under the License is distributed on an "AS IS" BASIS,
14. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15. // See the License for the specific language governing permissions and
16. // limitations under the License.
17.
18. package com.mjhenderson.users.tapestry;
19.
20. import java.io.File;
21. import java.net.URL;
22. import java.util.ArrayList;
23. import java.util.HashMap;
24. import java.util.Iterator;
25. import java.util.List;
26. import java.util.Map;
27.
28. import org.apache.commons.logging.Log;
29. import org.apache.commons.logging.LogFactory;
30. import org.apache.tapestry.IResourceLocation;
31.
32. /**
33. * @author <a href="mailto:michaelh@mjhenderson.com?subject=com.mjhenderson.users.tapestry.RecursiveFileLocator">Mike Henderson</a>
34. *
35. */
36. public class RecursiveFileLocator {
37.
38. private static final Log LOG = LogFactory.getLog(RecursiveFileLocator.class);
39.
40. private IResourceLocation _location;
41.
42. private File realRoot ;
43.
44. private Map _locations = new HashMap();
45.
46. public RecursiveFileLocator(IResourceLocation location,String _realRootFolder) {
47. realRoot = new File(_realRootFolder);
48. _location = location;
49. }
50.
51. /* (non-Javadoc)
52. * @see org.apache.tapestry.INamespace#getPageSpecification(java.lang.String)
53. */
54. public IResourceLocation resolveLocation(String expectedName) {
55. if (LOG.isDebugEnabled()) {
56. LOG.debug("getLocation("+expectedName+")");
57. }
58. IResourceLocation location = _resolveThisFolderLocation(expectedName);
59. if (location == null) {
60. location = _resolveChildFolderLocation(expectedName);
61. }
62. return location;
63. }
64.
65.
66. private IResourceLocation _resolveThisFolderLocation(String expectedName) {
67. if (LOG.isDebugEnabled()) {
68. LOG.debug("_resolveThisFolderLocation("+expectedName+")");
69. }
70. IResourceLocation location = (IResourceLocation)_locations.get(expectedName);
71. if (location == null) {
72. location = _location.getRelativeLocation(_location.getPath()+"/"+expectedName);
73.
74. if (location.getResourceURL() == null) {
75. return null;
76. }
77. _locations.put(expectedName, location);
78. }
79. return location;
80. }
81.
82.
83. private IResourceLocation _resolveChildFolderLocation(String expectedName) {
84. List children = _getChildFolderLocators();
85. Iterator iterator = children.iterator();
86. while (iterator.hasNext()) {
87. RecursiveFileLocator child = (RecursiveFileLocator)iterator.next();
88.
89. if (LOG.isDebugEnabled()) {
90. LOG.debug("_resolveChildFolderLocation() child = " + child + ", expectedName = " + expectedName);
91. }
92. IResourceLocation location = child.resolveLocation(expectedName);
93. if (location != null) {
94. return location;
95. }
96. }
97. return null;
98. }
99.
100. public String toString() {
101. return "RecursiveFileLocator { "+_location+" }";
102. }
103.
104. private List _children = new ArrayList();
105. private boolean _childrenLoaded = false;
106.
107. private List _getChildFolderLocators() {
108. if (!_childrenLoaded) {
109. _loadChildFolderLocators();
110. _childrenLoaded = true;
111. }
112. return _children;
113. }
114.
115. private void _loadChildFolderLocators() {
116.
117. if (LOG.isDebugEnabled()) {
118. LOG.debug("_loadChildFolderLocators() this = " + this);
119. }
120.
121. File file = realRoot;//new File(path);
122. if (file.isDirectory()) {
123. File[] files = file.listFiles();
124. for (int i = 0; i < files.length; i++) {
125. File f = files[i];
126. if (f.isDirectory() && !f.getName().equals("classes") && !f.getName().equals("lib")) {
127. RecursiveFileLocator child = new RecursiveFileLocator(_location.getRelativeLocation(f.getName()+"/"),file.getAbsolutePath()+"/"+f.getName());
128. if (LOG.isDebugEnabled()) {
129. LOG.debug("_loadChildFolderLocators() child = " + child);
130. }
131. _children.add(child);
132. }
133. }
134. }
135. }
136. }
.application文件中增加如下定义：
1.
2. <extension name="org.apache.tapestry.specification-resolver-delegate"
3. class="com.mjhenderson.users.tapestry.CustomSpecificationResolver"
4. immediate="yes">
5. </extension>
6.
以上代码已经在Tomcat和JBoss上经过测试，希望朋友们可以在别的应用服务器上帮我测测，呵呵。代码比较粗糙，谁要是发现了什么问题或有什么改进思路，希望能联系我。
顺便提醒一下，在http://www.t-deli.com上有一个Ant Task，可以根据你的页面存放路径自动更新.application文件里面的页面定义，这样似乎定义几百个页面也是很简单的事情，不过我还是倾向于不用配置直接使用的方法，就看你的需要和使用习惯了。