/*** wmts服务* @param params*/@Overridepublic void wmts(GeoEntityWmtsParams params) throws IOException, ServiceException, FactoryException {HttpServletResponse response = ServletUtils.getResponse();// 创建时间格式化对象，指定时间格式DateTimeFormatter timeFormatter = DateTimeFormatter.ofPattern("HH:mm:ss");String layerName = params.getLayer();String srs = params.getTilematrixset();//列 == xInteger tilecol = params.getTilecol();//行 == yInteger tilerow = params.getTilerow();String version = params.getVersion();String format = params.getFormat();//放大倍数Integer zoomLevel = params.getTilematrix();String tileMatrixSet = params.getTilematrixset();URL url = null;try {url = new URL("http://localhost:8080/geoserver/gwc/service/wmts?REQUEST=GetCapabilities");} catch (MalformedURLException e) {// will not happen}WebMapTileServer wmts = new WebMapTileServer(url);WMTSCapabilities capabilities = wmts.getCapabilities();WMTSLayer layer = capabilities.getLayer(layerName);CoordinateReferenceSystem crs = CRS.decode(srs);// Find the TileMatrixSet for the specified zoom levelTileMatrixSet matrixSet = wmts.getCapabilities().getMatrixSet(tileMatrixSet);MapContent mapContent = new MapContent();try {//CoordinateReferenceSystem crs = CRS.decode(srs);List res = geoEntityMapper.wms(layer.getTitle(),null,null,null,null);//featureSimpleFeatureTypeBuilder typeBuilder = new SimpleFeatureTypeBuilder();typeBuilder.setName("WMSFeatureType");//typeBuilder.setCRS(DefaultGeographicCRS.WGS84);typeBuilder.setCRS(crs);typeBuilder.add("geom", MultiPolygon.class);SimpleFeatureType featureType = typeBuilder.buildFeatureType();DefaultFeatureCollection featureCollection = new DefaultFeatureCollection(null, featureType);if(res!=null&&res.size()>0){Style style = SLD.createSimpleStyle(featureType, Color.GRAY);List layerList = new ArrayList<>();System.out.println("=====遍历前时间========"+ LocalTime.now().format(timeFormatter));res.stream().forEach((a)->{Geometry geometry = a.getGeom();SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(featureType);featureBuilder.add(geometry);SimpleFeature feature = featureBuilder.buildFeature(null);featureCollection.add(feature);SimpleFeatureSource featureSource = DataUtilities.source(featureCollection);FeatureLayer featureLayer = new FeatureLayer(featureSource, style);featureLayer.setTitle(layerName);layerList.add(featureLayer);});ReferencedEnvelope tileEnvelope = getTileEnvelope(tilecol, tilerow, matrixSet,crs,zoomLevel);mapContent.setTitle("WMS Image");mapContent.addLayers(layerList);GTRenderer renderer = new StreamingRenderer();renderer.setMapContent(mapContent);BufferedImage image = new BufferedImage(256, 256, BufferedImage.TYPE_INT_RGB);//根据以上信息渲染图片Graphics2D graphics = (Graphics2D) image.getGraphics();Rectangle rectangle = new Rectangle(256, 256);//ReferencedEnvelope referencedEnvelope = new ReferencedEnvelope(minX, maxX, minY, maxY, crs);System.out.println("=====paint前时间========"+ LocalTime.now().format(timeFormatter));renderer.paint(graphics, rectangle, tileEnvelope);System.out.println("=====paint后时间========"+ LocalTime.now().format(timeFormatter));//输出流输出到前端System.out.println("=====write前时间========"+ LocalTime.now().format(timeFormatter));ImageIO.write(image, "png", response.getOutputStream());System.out.println("=====write后时间========"+ LocalTime.now().format(timeFormatter));}}catch (Exception e){String message = e.getMessage();if (!message.contains("transform: latitude or longitude exceeded limits (-14)")) {log.error("图片输出异常:参数【" + JSON.toJSONString(params) + "】",e);} else {log.error("图片输出异常:参数【" + JSON.toJSONString(params) + "】" + e.getMessage());}}finally {mapContent.dispose();}}/*** 代码从geotools源码中拷贝 col row zoomlevel 转 minx,miny,maxx,maxy* @param tileCol* @param tileRow* @param matrixSet* @param crs* @return*/private ReferencedEnvelope getTileEnvelope(int tileCol, int tileRow, TileMatrixSet matrixSet,CoordinateReferenceSystem crs,Integer zoomLevel) {
////new WebMapTileServer();CoordinateSystem coordinateSystem = crs.getCoordinateSystem();Unit unit = (Unit) coordinateSystem.getAxis(0).getUnit();Point topLeft = matrixSet.getMatrices().get(17).getTopLeft();TileMatrix tileMatrix = matrixSet.getMatrices().get(zoomLevel);double denominator =tileMatrix.getDenominator();double pixelSpan = denominator * 0.28e-3;if (unit.equals(NonSI.DEGREE_ANGLE)) {pixelSpan /= 111319;}else{UnitConverter metersperunit = unit.getConverterTo(SI.METRE);pixelSpan /= metersperunit.convert(1);}double tileSpanY = (tileMatrix.getTileHeight() * pixelSpan);double tileSpanX = (tileMatrix.getTileWidth() * pixelSpan);double tileMatrixMinX;double tileMatrixMaxY;boolean longFirst = coordinateSystem.getAxis(0).getDirection().equals(AxisDirection.EAST);if (longFirst) {tileMatrixMinX = topLeft.getX();tileMatrixMaxY = topLeft.getY();} else {tileMatrixMaxY = topLeft.getX();tileMatrixMinX = topLeft.getY();}ReferencedEnvelope ret = new ReferencedEnvelope(crs);double minX = tileCol * tileSpanX + tileMatrixMinX;double maxY = tileMatrixMaxY - tileRow * tileSpanY;double maxX = minX + tileSpanX;double minY = maxY - tileSpanY;if (longFirst) {ret.expandToInclude(minX, minY);ret.expandToInclude(maxX, maxY);} else {ret.expandToInclude(minY, minX);ret.expandToInclude(maxY, maxX);}return ret;}
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