基于Tomcat部署的Geoserver配置Geowebcache，并转发ArcGIS切片

1、将GeowebCache的war包解压到tomcat的webapp下，打开war包中的WEB-INF中的web.xml文件，同时创建一个你想保存geowencache的切片的空文件夹，例如我命名叫arcgis

web.xml文件中添加<context-param>节点，param-value是你所建的文件夹

<context-param>
        <param-name>GEOWEBCACHE_CACHE_DIR</param-name>
        <param-value>D:Program FilesApache TomcatwebappsgeowebcacheWEB-INFarcgis</param-value>
</context-param>

2、在重启动tomcat 之后我们在arcgis文件夹中可以看到

3、打开webwebcache.xml文件，在<layer>…</layer>节点中添加如下节点：

 <arcgisLayer> 
     <name>arcgis_cache</name>
       <tilingScheme>E:\tile\arcgis\Layers\conf.xml</tilingScheme>
      <tileCachePath>E:\tile\arcgisLayers\_alllayers</tileCachePath>
      <hexZoom>false</hexZoom>
</arcgisLayer>

4、配置完以后我发现我无法启动geowebcache，日志报错

10 四月 18:12:15 (main) WARN [support.XmlWebApplicationContext] - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'gwcXmlConfig' defined in ServletContext resource [/WEB-INF/geowebcache-core-context.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: No ArcGISCacheGridsetConfiguration could be found
10 四月 18:12:15 (main) ERROR [context.ContextLoader] - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'gwcXmlConfig' defined in ServletContext resource [/WEB-INF/geowebcache-core-context.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: No ArcGISCacheGridsetConfiguration could be found
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1745)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)

网上找到了解决方法

找到geowebcache-core-context文件，往里面添加

<bean id="gwcArcGIGridsetConfigutation" class="org.geowebcache.arcgis.layer.ArcGISCacheGridsetConfiguration"/>

5、加完之后可以在geowebcache的list中查看到自己添加的瓦片，但是却不能预览，比例尺也是1：NAN

网上解释说高版本geowebcache可能无法预览，查看他的预览页面发现是OL3的库，因为我用的是OL4的库，不影响OL或者leaflet加载

6、重启一下服务，刷新一下

   var format = 'image/png';
       var tiled = new ol.layer.Tile({
           //visible: false,
           source: new ol.source.TileWMS({
               url: 'http://localhost:8888/geowebcache/service/wms',
               params: {
                   'FORMAT': format,
                   'VERSION': '1.0.0',
                    tiled: true,
                   "LAYERS": 'arcgis_cache',
                   "exceptions": 'application/vnd.ogc.se_inimage',
                   
               }
           })
       });
       var view = new ol.View({
           projection:"EPSG:4326",
           zoom: 13,
           center: [113.33, 34.01]
       });
       var map = new ol.Map({
           target: 'map',
           layers: [tiled],
           view:view
       });