求助!MeteoinfoLib java类库多线程运行时图生成异常

ertian

王老师您好，我在使用MeteoinfoLib java类库做等值面图生成开发时，因为涉及到“批量出图且出图速度要求尽量快”的需求，所以采用了多线程调用类库来生成图片，但是发现类库在多线程下运行不正常，会出现图片之间的图形元素错乱。我写了一个用类库来执行多线程的java类，已通过附件的形式提供，，烦请王老师帮忙看下。
多线程下目前发现有两处问题:
1.各线程之间图例叠加出错，比如线程1的图上本应该叠加线程1的图例，但实际上很大概率会叠加到其它线程的图例。

2.maskOut对图做处理时，会一定几率抛出Exception in thread "线程0" java.util.ConcurrentModificationException异常，导致此线程中止。

java代码类

1. package cc.htdf.meteoinfo.temp;
   
2. 
   
3. import org.meteoinfo.data.GridData;
   
4. import org.meteoinfo.data.StationData;
   
5. import org.meteoinfo.data.mapdata.MapDataManage;
   
6. import org.meteoinfo.data.meteodata.DrawMeteoData;
   
7. import org.meteoinfo.data.meteodata.GridDataSetting;
   
8. import org.meteoinfo.geoprocess.analysis.InterpolationMethods;
   
9. import org.meteoinfo.geoprocess.analysis.InterpolationSetting;
   
10. import org.meteoinfo.global.Extent;
    
11. import org.meteoinfo.layer.VectorLayer;
    
12. import org.meteoinfo.layout.*;
    
13. import org.meteoinfo.legend.MapFrame;
    
14. import org.meteoinfo.legend.PolygonBreak;
    
15. import org.meteoinfo.map.MapView;
    
16. 
    
17. import javax.print.PrintException;
    
18. import java.awt.*;
    
19. import java.io.File;
    
20. import java.io.IOException;
    
21. import java.util.Random;
    
22. import java.util.UUID;
    
23. 
    
24. /**
    
25. * meteoinfo测试类
    
26. *
    
27. * @date 2018/7/4
    
28. */
    
29. public class TestMi implements Runnable {
    
30. 
    
31.     private void threadMi(VectorLayer shapeLayer, StationData stationData) throws IOException, PrintException {
    
32.         String threadName = Thread.currentThread().getName();
    
33.         System.out.println("初始化!" + threadName);
    
34.         //图片分辨率
    
35.         int[] imageSize = {775, 555};
    
36.         //画布大小
    
37.         int[] layoutSize = {595, 410};
    
38.         //画布偏移
    
39.         int[] layoutOffset = {20, 105};
    
40.         //创建画图
    
41.         //初始化
    
42.         MapLayout mapLayout = new MapLayout();
    
43.         mapLayout.setBackground(new Color(255, 255, 255, 0));
    
44.         mapLayout.setFont(new Font("微软雅黑", Font.BOLD, 12));
    
45.         mapLayout.getLayoutMaps().get(0);
    
46.         //图片分辨率
    
47.         mapLayout.setSize(imageSize[0], imageSize[1]);
    
48.         mapLayout.setPageBounds(new Rectangle(0, 0, imageSize[0], imageSize[1]));
    
49.         mapLayout.getActiveLayoutMap().setLeft(layoutOffset[0]);
    
50.         mapLayout.getActiveLayoutMap().setTop(layoutOffset[1]);
    
51.         mapLayout.getActiveLayoutMap().setWidth(layoutSize[0]);
    
52.         mapLayout.getActiveLayoutMap().setHeight(layoutSize[1]);
    
53.         LayoutMap layoutMap = mapLayout.getActiveLayoutMap();
    
54.         layoutMap.setDrawGridLine(false);
    
55.         layoutMap.setDrawNeatLine(false);
    
56.         layoutMap.setDrawGridLabel(false);
    
57.         layoutMap.setDrawGridTickLine(false);
    
58.         //创建mapView对象
    
59.         MapFrame mapFrame = mapLayout.getActiveMapFrame();
    
60.         MapView mapView = mapFrame.getMapView();
    
61.         //格点配置
    
62.         GridDataSetting gridDataSetting = new GridDataSetting();
    
63.         gridDataSetting.dataExtent = shapeLayer.getExtent();
    
64.         gridDataSetting.xNum = 100;
    
65.         gridDataSetting.yNum = 100;
    
66.         //站点插值配置
    
67.         InterpolationSetting interpolationSetting = new InterpolationSetting();
    
68.         interpolationSetting.setInterpolationMethod(InterpolationMethods.IDW_Neighbors);
    
69.         interpolationSetting.setMinPointNum(3);
    
70.         interpolationSetting.setGridDataSetting(gridDataSetting);
    
71.         //站点插值成格点数据
    
72.         GridData gridData = stationData.interpolateData(interpolationSetting);
    
73.         //等值面分析
    
74.         VectorLayer shadedLayer = DrawMeteoData.createShadedLayer(gridData, "图例(" + threadName + ")", "Data", true);
    
75.         //图例配置
    
76.         LayoutLegend aLegend = mapLayout.addLegend(640, 0);
    
77.         aLegend.setLegendLayer(shadedLayer);
    
78.         aLegend.setFont(new Font("宋体", Font.BOLD, 12));
    
79.         aLegend.setLegendStyle(LegendStyles.Normal);
    
80.         aLegend.setTop(mapLayout.getHeight() - aLegend.getHeight() - 30);
    
81.         //裁剪
    
82.         PolygonBreak aPGB = (PolygonBreak) shapeLayer.getLegendScheme().getLegendBreaks().get(0);
    
83.         aPGB.setDrawFill(false);
    
84.         aPGB.setOutlineColor(new Color(128, 128, 128));
    
85.         aPGB.setOutlineSize(2);
    
86.         mapView.addLayer(shapeLayer);
    
87.         mapView.addLayer(shadedLayer);
    
88.         //开启//加入掩膜
    
89.         shadedLayer.setMaskout(true);
    
90.         mapView.getMaskOut().setMask(true);
    
91.         mapView.getMaskOut().setMaskLayer(shapeLayer.getLayerName());
    
92.         mapView.zoomToExtent(shapeLayer.getExtent());
    
93.         //加入标题
    
94.         LayoutGraphic lTitle = mapLayout.addText("等值面(" + threadName + ")", mapLayout.getWidth() / 2, 40, 40);
    
95.         lTitle.setTop(15);
    
96.         //刷新配置
    
97.         mapView.paintLayers();
    
98.         mapView.repaint();
    
99.         //输出图片
    
100.         String outPutFileUrl = "E:\\OUT_PUT\" + UUID.randomUUID().toString().substring(0, 7) + "_" + threadName + ".png";
     
101.         //建立父目录
     
102.         new File(outPutFileUrl).mkdirs();
     
103.         mapLayout.exportToPicture(outPutFileUrl);
     
104.         System.out.println("生成成功!" + Thread.currentThread().getName());
     
105.     }
     
106. 
     
107.     @Override
     
108.     public void run() {
     
109.         //任意导入一个省份的轮廓shape图层
     
110.         String shapeUrl = "E:\\shp\\河南省_province.shp";
     
111.         //获取数据
     
112.         VectorLayer shapeLayer = null;
     
113.         try {
     
114.             shapeLayer = MapDataManage.readMapFile_ShapeFile(shapeUrl);
     
115.         } catch (Exception e) {
     
116.             e.printStackTrace();
     
117.         }
     
118.         if (shapeLayer == null) {
     
119.             System.out.println("shape读取出错!");
     
120.             return;
     
121.         }
     
122.         //经纬度范围
     
123.         Extent extent = shapeLayer.getExtent();
     
124.         //随机站点数据
     
125.         int sNum = 100;
     
126.         StationData stationData = new StationData();
     
127.         for (int i = 0; i < sNum; i++) {
     
128.             double lon = new Random().nextDouble() * (extent.maxX - extent.minX) + extent.minX;
     
129.             double lat = new Random().nextDouble() * (extent.maxY - extent.minY) + extent.minY;
     
130.             double value = new Random().nextInt(70) + 15;
     
131.             stationData.addData("", "", lon, lat, value);
     
132.         }
     
133.         //生成图形
     
134.         try {
     
135.             threadMi(shapeLayer, stationData);
     
136.         } catch (IOException | PrintException e) {
     
137.             e.printStackTrace();
     
138.         }
     
139.     }
     
140. 
     
141.     public static void main(String[] args) throws Exception {
     
142.         int threadNum = 8;
     
143.         TestMi testMi = new TestMi();
     
144.         for (int i = 0; i < threadNum; i++) {
     
145.             Thread thread = new Thread(testMi);
     
146.             thread.setName("线程" + i);
     
147.             thread.start();
     
148.             Thread.sleep(2000);
     
149.         }
     
150.     }
     
151. }
     

复制代码

黄盛

为什么单独运行这个类会报错呢， mapLayout.getLayoutMaps().get(0);这个方法包空指针

qqqbx505

请问解决了吗？能告知吗？我现在正在学习，需要这方面的内容