Geowebcache发布细节及跨域解决

一、gwc发布地图切片步骤

准备好切片数据，对gwc进行配置，如下：

1. Geowebcache安装

Geowebcache解压缩在tomcat下的webapps文件夹中，随tomcat启动而起动，端口同tomcat端口

2. Geowebcache配置

修改web-inf文件夹下的文件web.xml，在</context-param>节点后添加如下节点(实际切片路径)

<context-param>  
    <param-name>GEOWEBCACHE_CACHE_DIR</param-name>    
    <param-value>E:\\cityMap\\XiAnCacheTiles</param-value>  
</context-param> 

重启服务之后，进入E:\cityMap\XiAnCacheTiles目录下，修改生成的geowebcache.xml文件，在<layers>…</layers>节点中添加如下节点（加入有三个图层）

<arcgisLayer>
        <name>xaAnno</name>
        <tilingScheme>E:\\cityMap\\XiAnCacheTiles\\xaAnno\\Conf.xml</tilingScheme>
        <tileCachePath>E:\\cityMap\\XiAnCacheTiles\\xaAnno\\_alllayers\\</tileCachePath>
    </arcgisLayer>
    <arcgisLayer>
        <name>xaMap</name>
        <tilingScheme>E:\\cityMap\\XiAnCacheTiles\\xaMap\\Conf.xml</tilingScheme>
        <tileCachePath>E:\\cityMap\\XiAnCacheTiles\\xaMap\\_alllayers\\</tileCachePath>
    </arcgisLayer>
    <arcgisLayer>
        <name>china</name>
        <tilingScheme>E:\\cityMap\\XiAnCacheTiles\\china\\Conf.xml</tilingScheme>
        <tileCachePath>E:\\cityMap\\XiAnCacheTiles\\china\\_alllayers\\</tileCachePath>
    </arcgisLayer> 

二、gwc跨域问题解决
在geoserver中WEB-INF文件夹下，修改web.xml文件，添加过滤器内容，如下：

<filter-name>CorsFilter</filter-name>
      <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
      <init-param>
        <param-name>cors.allowed.origins</param-name>
        <param-value>*</param-value>
      </init-param>
      <init-param>
        <param-name>cors.allowed.methods</param-name>
        <param-value>GET,POST,HEAD,OPTIONS,PUT</param-value>
      </init-param>
      <init-param>
        <param-name>cors.allowed.headers</param-name>
        <param-value>Content-Type,X-Requested-With,accept,Origin,Access-Control-Request-Method,Access-Control-Request-Headers</param-value>
      </init-param>
      <init-param>
        <param-name>cors.exposed.headers</param-name>
        <param-value>Access-Control-Allow-Origin,Access-Control-Allow-Credentials</param-value>
      </init-param>
      <init-param>
        <param-name>cors.support.credentials</param-name>
        <param-value>true</param-value>
      </init-param>
      <init-param>
        <param-name>cors.preflight.maxage</param-name>
        <param-value>10</param-value>
      </init-param>
    </filter>
    <filter-mapping>
      <filter-name>CorsFilter</filter-name>
      <url-pattern>/*</url-pattern>
    </filter-mapping>

修改完成保存，重新启动Tomcat即可跨域访问。