Bug 29003 Preferences 'Output Folder Name' needs to allow '/' in the path [build path]
In the window/preferences/Java/New Project panel, when 'Folders' radio button is set, the 'output folder name' cannot be set to something like 'WEB- INF/classes'. The error message "'/' is an invalid character" appears. However, when setting the output path on the project (project/properties), 'WEB- INF/classes' is allowed, as the '/' is valid. Please change the window/preferences to allow a '/' in output folder name, so this value can be set by default.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/NewJavaProjectPreferencePage.java
buf.append(entry.getEntryKind());
			buf.append(' ');
			buf.append(encodePath(entry.getPath()));
			buf.append(' ');
			buf.append(encodePath(entry.getSourceAttachmentPath()));
			buf.append(' ');
			buf.append(encodePath(entry.getSourceAttachmentRootPath()));
			buf.append(' ');
			buf.append(entry.isExported());
			buf.append(' ');
		}
		return buf.toString();
	}
	
	private static String encodePath(IPath path) {
		if (path == null) {
			return "#"; 
		} else if (path.isEmpty()) {
			return "&"; 
		} else {
			return URLEncoder.encode(path.toString());
		}
	}
	
	private static IPath decodePath(String str) {
		if ("#".equals(str)) { 
			return null;
		} else if ("&".equals(str)) { 
			return Path.EMPTY;
		} else {