ReadDEM.java

package heyingzhe;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
// 读取dem数据
public class ReadDEM {
    private String filepath;
    private int ncols;
    private int nrows;
    private double xllcorner;
    private double yllcorner;
    private double cellsize;
    private int NODATA_value;
    private int[][] data;

    // 构造函数，输入文件路径
    public ReadDEM(String filepath) throws IOException {
        this.filepath = filepath;
        this.data = readData();
    }

    // 返回dem数组
    public int[][] getData() {
        return data;
    }

    // 读取dem数据中的网格数据和dem数据
    public int[][] readData() throws IOException {
        BufferedReader reader = new BufferedReader(new FileReader(filepath));
        ncols = Integer.parseInt(reader.readLine().split("\\s+")[1]);
        nrows = Integer.parseInt(reader.readLine().split("\\s+")[1]);
        xllcorner = Double.parseDouble(reader.readLine().split("\\s+")[1]);
        yllcorner = Double.parseDouble(reader.readLine().split("\\s+")[1]);
        cellsize = Double.parseDouble(reader.readLine().split("\\s+")[1]);
        NODATA_value = Integer.parseInt(reader.readLine().split("\\s+")[1]);

        data = new int[nrows][ncols];
        for (int i = 0; i < nrows; i++) {
            String[] line = reader.readLine().split(" ");
            for (int j = 0; j < ncols; j++) {
                data[i][j] = Integer.parseInt(line[j]);
            }
        }
        reader.close();
        return data;
    }

    // 打印网格数据
    public void getProperty() {
        System.out.println(ncols + " " + nrows + " " + xllcorner + " " + yllcorner + " " + cellsize + " " + NODATA_value);
    }

    // 打印dem数组
    public void printData() {
        for (int i = 0; i < 10; i++) {
            for (int j = 0; j < 10; j++) {
                System.out.print(data[i][j] + "\t");
            }
            System.out.println();
        }
    }
}