Mapxtreme java IntraServletContainerRenderer实现

IntraServletContainerRenderer是Mapxtreme java的一种渲染器,他的特点是,图片直接发送到客户机,不需要通过中间层,可以提高图片显示的速度,下面是他的具体实现

MapJ mapJ = new MapJ();mapJ.loadMapDefinition("c://test.mdf");mapJ.setDeviceBounds(new DoubleRect(0,0,800d,600d));ServletConfig thisServletConfig = this.getServletConfig();ServletContext thisServletContext = thisServletConfig.getServletContext();this.logger.info("thisServletContext = " + thisServletContext.getContextPath());//这个路径的是这样,你的项目的mapxtreme的路径是//http://localhost:9090/test/mapxtreme//那么这里就写/test/mapxtreme就可以取到了ServletContext mxtServletContext = thisServletContext.getContext("/test/mapxtreme");this.logger.info("mxtServletContext = " + mxtServletContext);if(mxtServletContext != null) {try{IntraServletContainerRenderer isRenderer = new IntraServletContainerRenderer(mxtServletContext, "mapxtreme", request, response);ImageRequestComposer imageRC = ImageRequestComposer.create(mapJ, 256, Color.blue, "image/gif");isRenderer.render(imageRC);}catch(Exception e){} }

然后,还需要在web.xml里面还需要这么写

<!-- core MapXtreme Java servlet --><servlet><servlet-name>mapxtreme</servlet-name><servlet-class>com.mapinfo.mapxtreme.MapXtremeServlet</servlet-class><load-on-startup>1</load-on-startup></servlet><!-- internal servlets which are called by MapXtremeServlet --><!-- these servlets should not be called directly! --><servlet><servlet-name>mxtj_image</servlet-name><servlet-class>com.mapinfo.mapxtreme.ImageHandlerServlet</servlet-class><load-on-startup>2</load-on-startup></servlet><servlet><servlet-name>mxtj_metadata</servlet-name><servlet-class>com.mapinfo.mapxtreme.MetadataHandlerServlet</servlet-class><load-on-startup>3</load-on-startup></servlet><servlet><servlet-name>mxtj_vector</servlet-name><servlet-class>com.mapinfo.mapxtreme.VectorHandlerServlet</servlet-class><load-on-startup>4</load-on-startup></servlet><!-- Named Resources servlet --><servlet><servlet-name>namedresource</servlet-name><servlet-class>com.mapinfo.jndi.namedres.NamedResourceServlet</servlet-class></servlet><!-- CoordTransform servlet --><servlet><servlet-name>coordtransform</servlet-name><servlet-class>com.mapinfo.coordsys.io.CoordTransformServlet</servlet-class></servlet><!-- 这里就是mapxtreme的路径 --><!-- servlet URL mappings --><!-- mapxtreme --><servlet-mapping><servlet-name>mapxtreme</servlet-name><url-pattern>/servlet/mapxtreme</url-pattern></servlet-mapping><servlet-mapping><servlet-name>mapxtreme</servlet-name><url-pattern>/mapxtreme</url-pattern></servlet-mapping><!-- namedresource --><servlet-mapping><servlet-name>namedresource</servlet-name><url-pattern>/servlet/namedresource</url-pattern></servlet-mapping><servlet-mapping><servlet-name>namedresource</servlet-name><url-pattern>/namedresource</url-pattern></servlet-mapping><!-- coordtransform --><servlet-mapping><servlet-name>coordtransform</servlet-name><url-pattern>/servlet/coordtransform</url-pattern></servlet-mapping><servlet-mapping><servlet-name>coordtransform</servlet-name><url-pattern>/coordtransform</url-pattern></servlet-mapping>