java.lang.Object
- org.springframework.web.servlet.resource.ResourceUrlProvider

All Implemented Interfaces:
EventListener, ApplicationListener<ContextRefreshedEvent>
```
public class ResourceUrlProvider
extends Object
implements ApplicationListener<ContextRefreshedEvent>
```
A central component to use to obtain the public URL path that clients should use to access a static resource.
This class is aware of Spring MVC handler mappings used to serve static resources and uses the ResourceResolver chains of the configured ResourceHttpRequestHandlers to make its decisions.
Since:
4.1
Author:
Rossen Stoyanchev

Field Summary
Fields
Modifier and Type Field Description
protected Log logger

Constructor Summary
Constructors
Constructor Description
ResourceUrlProvider()

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`protected void`	`detectResourceHandlers(ApplicationContext appContext)`
`String`	`getForLookupPath(String lookupPath)`	Compare the given path against configured resource handler mappings and if a match is found use the `ResourceResolver` chain of the matched `ResourceHttpRequestHandler` to resolve the URL path to expose for public use.
`String`	`getForRequestUrl(HttpServletRequest request, String requestUrl)`	A variation on `getForLookupPath(String)` that accepts a full request URL path (i.e.
`Map<String,ResourceHttpRequestHandler>`	`getHandlerMap()`	Return the resource mappings, either manually configured or auto-detected when the Spring `ApplicationContext` is refreshed.
`UrlPathHelper`	`getPathHelper()`	Deprecated. as of Spring 4.2.8, in favor of `getUrlPathHelper()`
`PathMatcher`	`getPathMatcher()`	Return the configured `PathMatcher`.
`UrlPathHelper`	`getUrlPathHelper()`	Return the configured `UrlPathHelper`.
`boolean`	`isAutodetect()`	Return `false` if resource mappings were manually configured, `true` otherwise.
`void`	`onApplicationEvent(ContextRefreshedEvent event)`	Handle an application event.
`void`	`setHandlerMap(Map<String,ResourceHttpRequestHandler> handlerMap)`	Manually configure the resource mappings.
`void`	`setPathMatcher(PathMatcher pathMatcher)`	Configure a `PathMatcher` to use when comparing target lookup path against resource mappings.
`void`	`setUrlPathHelper(UrlPathHelper urlPathHelper)`	Configure a `UrlPathHelper` to use in `getForRequestUrl(javax.servlet.http.HttpServletRequest, String)` in order to derive the lookup path for a target request URL path.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - logger
```
protected final Log logger
```
- Constructor Detail
  - ResourceUrlProvider
```
public ResourceUrlProvider()
```
- Method Detail
  - setUrlPathHelper
```
public void setUrlPathHelper(UrlPathHelper urlPathHelper)
```
    Configure a UrlPathHelper to use in getForRequestUrl(javax.servlet.http.HttpServletRequest, String) in order to derive the lookup path for a target request URL path.
  - getUrlPathHelper
```
public UrlPathHelper getUrlPathHelper()
```
    Return the configured UrlPathHelper.
    Since:
    4.2.8
  - getPathHelper
```
@Deprecated
public UrlPathHelper getPathHelper()
```
    Deprecated.
    as of Spring 4.2.8, in favor of getUrlPathHelper()
  - setPathMatcher
```
public void setPathMatcher(PathMatcher pathMatcher)
```
    Configure a PathMatcher to use when comparing target lookup path against resource mappings.
  - getPathMatcher
```
public PathMatcher getPathMatcher()
```
    Return the configured PathMatcher.
  - setHandlerMap
```
public void setHandlerMap(Map<String,ResourceHttpRequestHandler> handlerMap)
```
    Manually configure the resource mappings.
    Note: by default resource mappings are auto-detected from the Spring ApplicationContext. However if this property is used, the auto-detection is turned off.
  - getHandlerMap
```
public Map<String,ResourceHttpRequestHandler> getHandlerMap()
```
    Return the resource mappings, either manually configured or auto-detected when the Spring ApplicationContext is refreshed.
  - isAutodetect
```
public boolean isAutodetect()
```
    Return false if resource mappings were manually configured, true otherwise.
  - onApplicationEvent
```
public void onApplicationEvent(ContextRefreshedEvent event)
```
    Description copied from interface: ApplicationListener
    Handle an application event.
    Specified by:
    onApplicationEvent in interface ApplicationListener<ContextRefreshedEvent>
    Parameters:
    event - the event to respond to
  - detectResourceHandlers
```
protected void detectResourceHandlers(ApplicationContext appContext)
```
  - getForRequestUrl
```
public final String getForRequestUrl(HttpServletRequest request,
                                     String requestUrl)
```
    A variation on getForLookupPath(String) that accepts a full request URL path (i.e. including context and servlet path) and returns the full request URL path to expose for public use.
    Parameters:
    request - the current request
    requestUrl - the request URL path to resolve
    Returns:
    the resolved public URL path, or null if unresolved
  - getForLookupPath
```
public final String getForLookupPath(String lookupPath)
```
    Compare the given path against configured resource handler mappings and if a match is found use the ResourceResolver chain of the matched ResourceHttpRequestHandler to resolve the URL path to expose for public use.
    It is expected that the given path is what Spring MVC would use for request mapping purposes, i.e. excluding context and servlet path portions.
    If several handler mappings match, the handler used will be the one configured with the most specific pattern.
    Parameters:
    lookupPath - the lookup path to check
    Returns:
    the resolved public URL path, or null if unresolved

Class ResourceUrlProvider

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

logger

Constructor Detail

ResourceUrlProvider

Method Detail

setUrlPathHelper

getUrlPathHelper

getPathHelper

setPathMatcher

getPathMatcher

setHandlerMap

getHandlerMap

isAutodetect

onApplicationEvent

detectResourceHandlers

getForRequestUrl

getForLookupPath