Вот два метода из org.springframework.web.util.UrlPathHelper, которые объясняют поведение.
| Код |
/**
* Return the mapping lookup path for the given request, within the current
* servlet mapping if applicable, else within the web application.
* <p>Detects include request URL if called within a RequestDispatcher include.
* @param request current HTTP request
* @return the lookup path
* @see #getPathWithinApplication
* @see #getPathWithinServletMapping
*/
public String getLookupPathForRequest(HttpServletRequest request) {
// Always use full path within current servlet context?
if (this.alwaysUseFullPath) {
return getPathWithinApplication(request);
}
// Else, use path within current servlet mapping if applicable
String rest = getPathWithinServletMapping(request);
if (!"".equals(rest)) {
return rest;
}
else {
return getPathWithinApplication(request);
}
}
/**
* Return the path within the servlet mapping for the given request,
* i.e. the part of the request's URL beyond the part that called the servlet,
* or "" if the whole URL has been used to identify the servlet.
* <p>Detects include request URL if called within a RequestDispatcher include.
* <p>E.g.: servlet mapping = "/test/*"; request URI = "/test/a" -> "/a".
* <p>E.g.: servlet mapping = "/test"; request URI = "/test" -> "".
* <p>E.g.: servlet mapping = "/*.test"; request URI = "/a.test" -> "".
* @param request current HTTP request
* @return the path within the servlet mapping, or ""
*/
public String getPathWithinServletMapping(HttpServletRequest request) {
String pathWithinApp = getPathWithinApplication(request);
String servletPath = getServletPath(request);
if (pathWithinApp.startsWith(servletPath)) {
// Normal case: URI contains servlet path.
return pathWithinApp.substring(servletPath.length());
}
else {
// Special case: URI is different from servlet path.
// Can happen e.g. with index page: URI="/", servletPath="/index.html"
// Use servlet path in this case, as it indicates the actual target path.
return servletPath;
}
}
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Но не объясняют зачем так сделано  |
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