使用java創建netcdf文件，並寫入數據的接口

   //固定nc文件
public static final String filepath="E://output//testNCfiles9999gs.nc";

@PostMapping("/createNCfile")
public static void createNCfile(@RequestParam(value = "width",required = true) Integer width,
                                @RequestParam(value = "height",required = true) Integer height,
                                @RequestParam(value = "lonWest",required = true) double lonWest,
                                @RequestParam(value = "latSouth",required = true) double latSouth,
                                @RequestParam(value = "gridInterval",required = true) double gridInterval
                                ){
    //創建netcdf3寫入文件對象
    NetcdfFileWriter fileWriter;
    double d[][]=new double[width][height];
    for (int i = 0; i < width; i++) {
        for (int j = 0; j < height; j++) {
            d[i][j]=Math.sin(i+j);
        }
    }
    try {
        fileWriter = NetcdfFileWriter.createNew(NetcdfFileWriter.Version.netcdf3, filepath);
        //分別創建經度和緯度方向的維度，lon的寬度爲width,lat高度爲height,並命名爲lon和lat
        Dimension xdim=fileWriter.addDimension(null, "lon", width);
        Dimension ydim=fileWriter.addDimension(null, "lat", height);
        //通過一維組合成二維array list
        ArrayList<Dimension> dims=new ArrayList<Dimension>();
        //注意這裏add的順序很重要,一定要和數據對應，如果把list順序調換，
        // 那麼二維的維度也會不同，相當於數學中的座標系，
        // 第一個是x座標，第二個是y座標，x寬度爲width,y高度爲height
        dims.add(xdim);
        dims.add(ydim);
        //創建名稱爲lon的變量,類型爲folat，對應的維度爲lon,對應Dimension裏面定義的名稱爲"lon"的那個
        Variable vx=fileWriter.addVariable(null, "lon", DataType.FLOAT, "lon");
        //給vx變量加上數據說明，全程long_name
        fileWriter.addVariableAttribute(vx, new Attribute("long_name","longitude" ));
        //給vx變量加上units，對應的Degree_east，如果不加units爲Degree_east(東經)，則不是地理座標系，這個很重要
        fileWriter.addVariableAttribute(vx, new Attribute("units","Degrees_east" ));


        Variable vy=fileWriter.addVariable(null, "lat", DataType.FLOAT, "lat");
        fileWriter.addVariableAttribute(vy, new Attribute("long_name","latitude" ));
        //給vy變量加上units，對應的Degree_north，如果不加units爲Degree_north(北緯)，則不是地理座標系，這個很重要
        fileWriter.addVariableAttribute(vy, new Attribute("units","Degrees_north" ));

        //創建變量名稱爲var的變量，對應的維度爲dims,該dims爲上面定義的一個ArrayList<Diminsion>，該list包含2個維度，經度和維度
        Variable v=fileWriter.addVariable(null, "var", DataType.FLOAT, dims);
        fileWriter.addVariableAttribute(v, new Attribute("long_name","數據的詳細描述" ));
        fileWriter.addVariableAttribute(v, new Attribute("units","unit" ));

        //使用create()來創建該文件，只有create之後才能在文件夾中顯示該文件，並且寫入數據
        fileWriter.create();
        //創建x和y方向上的變量。D1    代表一維
        ArrayFloat xvalues=new ArrayFloat.D1(width);
        ArrayFloat yvalues=new ArrayFloat.D1(height);
        //創建網格上的變量，D2代表二維，用(width, height)來描述他的定義域，
        // 這個順序必須和ArrayList<Dimension> 加載的順序一一對應，否則會出錯
        ArrayFloat values=new ArrayFloat.D2(width, height);
        Index index=values.getIndex();
        for (int i = 0; i < width; i++) {
            for (int j = 0; j < height; j++) {
                //將二維數組[i][j]處的數據寫入網格的i,j處
                values.setDouble(index.set(i, j), d[i][j]);
            }
        }
        for (int i = 0; i < width; i++) {
            xvalues.setFloat(i, (float) (lonWest+gridInterval*i));
        }
        for (int j = 0; j < height; j++) {
            yvalues.setFloat(j, (float) (latSouth+gridInterval*j));
        }
        fileWriter.write(vx, xvalues);
        fileWriter.write(vy, yvalues);
        fileWriter.write(v, values);
        //關流
        fileWriter.close();
        System.out.println("文件已存入"+filepath);
    }catch (IOException e) {
        e.printStackTrace();
        System.out.println("文件創建失敗，請檢查路徑");
    } catch (InvalidRangeException e) {
        e.printStackTrace();
        System.out.println("文件寫入錯誤，超出範圍");
    }
}