Java调用SuperMap iServer Java6R的REST API (2)

上篇文章讨论了Java调用 SuperMap iServer Java6R的REST API 比较直接，直接自己拼URL，比较费劲，今天发现SuperMap iServer Java6R的SP1版中提供了RestMapProvider 等接口，意味着可以直接调用 iServer-all的 jar包即可。

 

准备：

1、启动iServer 6R服务。

 

代码：

package com.awei20081.restMap;

import com.supermap.services.components.commontypes.*;
import com.supermap.services.providers.*;

public class TestMapProvider {
	public final static void main(String[] args) throws Exception {
		
		/***
		 * 思路如下：
		 * 1、实例化RestMapProvider对象。
		 * 2、调用专题图接口，设置专题图。
		 * 3、调用RestMapProvider对象的getMapImage方法获取图片。
		 * 4、输出URL，在浏览器中输入此地址，访问。
		 */
		
		//实例化一个RestMapProviderSetting
		RestMapProviderSetting restMapProviderSetting = new RestMapProviderSetting();
		//设置Rest服务的根目录
		restMapProviderSetting.restServiceRootURL = "http://localhost:8090/iserver/services/maps/rest/";
		//实例化RestMapProvider对象
		RestMapProvider restMapProvider = new RestMapProvider(restMapProviderSetting);
		//获取默认地图参数
		MapParameter defaultMapParam = restMapProvider.getDefaultMapParameter("世界地图");
		MapParameter currentMapParam = new MapParameter(defaultMapParam);
		// 找到地图对应的图层集合
		LayerCollection layerCollection = currentMapParam.layers.get(0).subLayers;
		// 清除掉地图中配置的所有图层
		layerCollection.clear();
		// 新建专题图图层
		UGCThemeLayer themeLayer = new UGCThemeLayer();
		ThemeGraph themeGraph = new ThemeGraph();
		// 使用3维饼图
		themeGraph.graphType = ThemeGraphType.PIE3D;
		// 使用值作为显示文本
		themeGraph.graphTextFormat = GraphTextFormat.VALUE;
		// 等级大小使用常量模式
		themeGraph.graduatedMode = GraduatedMode.CONSTANT;
		// 是否固定大小，true表示不随图缩放
		themeGraph.graphSizeFixed = false;
		// 显示文本
		themeGraph.graphTextDisplayed = true;
		// 显示负值
		themeGraph.negativeDisplayed = true;
		themeGraph.items = new ThemeGraphItem[2];
		ThemeGraphItem item0 = new ThemeGraphItem();
		// 字段SQKM对应的部分使用红色来表示
		item0.graphExpression = "SQKM";
		item0.uniformStyle = new Style();
		item0.uniformStyle.fillForeColor = new Color(255, 0,0);
		item0.caption = "1";

		ThemeGraphItem item1 = new ThemeGraphItem();
		// 字段SQMI对应的部分使用绿色来表示
		item1.graphExpression = "SQMI";
		item1.uniformStyle = new Style();
		item1.uniformStyle.fillForeColor = new Color(0, 255,0);
		item1.caption = "2";
		themeGraph.items[0] = item0;
		themeGraph.items[1] = item1;
        // 设置数据集信息，必须为矢量数据集
        DatasetVectorInfo datasetInfo = new DatasetVectorInfo();
        datasetInfo.name = "Countries";
        datasetInfo.dataSourceName = "World";
        datasetInfo.type = DatasetType.REGION;
        // 给图层赋值
        themeLayer.theme = themeGraph;
        themeLayer.datasetInfo = datasetInfo;
		themeLayer.opaqueRate = 100;
        // 添加到图层集合中，以便显示在地图上
        layerCollection.add(themeLayer);
		// 不使用图片缓存，每次都会重新出图
		currentMapParam.cacheEnabled = false;
		// 设置出图大小为800x800
		currentMapParam.viewer = new Rectangle(0,0,512,512);
		// 设置出图返回格式为文件路径
		currentMapParam.returnType = ReturnType.URL;
		//实例化图片选项
		ImageOutputOption outputOption = new ImageOutputOption();
		// 指定出图格式为png
		outputOption.format = OutputFormat.PNG;
		//调用getMapImage接口，获取图片对象
		MapImage mapImage = restMapProvider.getMapImage(currentMapParam,outputOption);
		//输出图片地址
		System.out.println(mapImage.imageUrl.toString());
    }	
}

 

得到输出结果：

http://localhost:8090/iserver/services/maps/rest/maps/%E4%B8%96%E7%95%8C%E5%9C%B0%E5%9B%BE/image.png?viewer=%7B%22leftTop%22%3A%7B%22y%22%3A0%2C%22x%22%3A0%7D%2C%22rightBottom%22%3A%7B%22y%22%3A512%2C%22x%22%3A512%7D%7D&cacheEnabled=false&rectifyType=BYCENTERANDMAPSCALE&clipRegion=%7B%22center%22%3Anull%2C%22id%22%3A0%2C%22style%22%3Anull%2C%22parts%22%3Anull%2C%22points%22%3Anull%2C%22type%22%3A%22REGION%22%7D&clipRegionEnabled=false&customEntireBoundsEnabled=false&angle=0.0&antialias=true&colorMode=DEFAULT&dynamicProjection=false&markerAngleFixed=false&maxVisibleTextSize=1000.0&maxVisibleVertex=3600000&minVisibleTextSize=0.3&overlapDisplayed=true&paintBackground=true&textAngleFixed=false&textOrientationFixed=false&center=%7B%22y%22%3A27.5734580668%2C%22x%22%3A96.1736997712%7D&scale=2.563206512274041E-8&layersID=tu45quuz_fc28ec230a514c45a2217b8db661b191&imageFormat=PNG&noLayers=true&transparent=false

输入浏览测试，得到效果图如下

此处简单使用了RestMapProvider接口，后续再对程序进行升级扩展，做出一个C/S小系统。