小功能实现（十八）生成kml文件

引入依赖

        <!--解析、生成kml文件类-->
        <dependency>
            <groupId>de.micromata.jak</groupId>
            <artifactId>JavaAPIforKml</artifactId>
            <version>2.2.0</version>
        </dependency>

使用方法

注意：需要什么内容可自行添加

	//生成线路路径kml文件并返回流给前端
    public void exportCornerKml(List<Map<String,String>> cornerData, HttpServletResponse httpServletResponse) throws Exception{
        //数据准备
        OutputStream outputStream=null;

        Kml kml = KmlFactory.createKml();
        Document document = kml.createAndSetDocument().withName("").withId("").withVisibility(true).withOpen(true).withDescription("");

        // 创建Style
        Style style = document.createAndAddStyle().withId("normal_default");
        LineStyle lineStyle = style.createAndSetLineStyle().withColor("ffffffff").withWidth(1);

		// 创建Placemark
        Placemark placemark = document.createAndAddPlacemark();
        placemark.withName("和城-厉阳");
        placemark.withVisibility(true).withDescription("");
        placemark.withStyleUrl("#default");

        // 创建LineString
        LineString lineString = placemark.createAndSetLineString();
        lineString.withExtrude(false).withTessellate(true).withAltitudeMode(AltitudeMode.CLAMP_TO_GROUND);
        List<Coordinate> coordinates = new ArrayList<>();
        for (int i=0;i<cornerData.size();i++){
            coordinates.add(new Coordinate(Double.valueOf(cornerData.get(i).get("positionX")), Double.valueOf(cornerData.get(i).get("positionY")), 0.0));
        }
        lineString.setCoordinates(coordinates);

        //输出
        try {
            //获取表并写入
            outputStream=httpServletResponse.getOutputStream();
            httpServletResponse.setContentType("application/vnd.google-earth.kml+xml");
            httpServletResponse.setCharacterEncoding("utf-8");
            httpServletResponse.setHeader("Content-Disposition", "attachment;filename=" + java.net.URLEncoder.encode("路径.kml", "UTF-8"));
            kml.marshal(outputStream);
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }