zb1filereader.java

MAP GIS 一种底层的JAVA程序

import java.io.*;
import java.awt.geom.*;
import java.util.*;
public class Zb1FileReader
{
	private double xmax,ymax,xmin,ymin;
	private long maxPointNum;
	private ArrayList geomData;
	public Zb1FileReader()
	{
		geomData = new ArrayList();
	}
	public ArrayList getGeomData()
	{
		return geomData;
	}
	public long getMaxPointNum()
	{
		return maxPointNum;
	}
	public Rectangle2D.Double getBound()
	{
		Rectangle2D.Double bound = new Rectangle2D.Double(xmin,ymax,xmax-xmin,ymax-ymin);
		return bound;
	}
	public void readData(File filePath)
	{
		System.out.println("reading file : " + filePath);
		short flag = 0;
		try
		{
			BufferedReader in = new BufferedReader(new FileReader(filePath));
			short pointNum, i;
			double x, y;
			String s;
			while((s = in.readLine()) != null)
			{
				ZbaFeature feature = new ZbaFeature();
				StringTokenizer st = new StringTokenizer(s);
				
				feature.setCode1(Short.parseShort(st.nextToken()));
				feature.setCode2(Short.parseShort(st.nextToken()));
				s = in.readLine();
				StringTokenizer st1 = new StringTokenizer(s);
				feature.setCode3(Short.parseShort(st1.nextToken()));
				pointNum = Short.parseShort(st1.nextToken());
				feature.setPointNum(pointNum);
				if(pointNum > maxPointNum)
					maxPointNum = pointNum;
				for(i = 0; i < pointNum; i++)
				{
					s = in.readLine();
					StringTokenizer st2 = new StringTokenizer(s);
					x = Double.parseDouble(st2.nextToken());
					y = Double.parseDouble(st2.nextToken());
					if(flag == 0)
					{
						xmax=x;xmin=x;ymax=y;ymin=y;flag=1; 
					}
					else
					{   
						if(x>xmax) xmax=x;	
						if(x<xmin) xmin=x;
						if(y>ymax) ymax=y;	
						if(y<ymin) ymin=y; 
					}
					Point2D.Double pt = new  Point2D.Double(x,y);
					feature.addPoint(pt);
				}
				geomData.add(feature);
				
			}
		}
		catch(Exception e)
		{
			System.out.println("getGeomData()" + e);
		}
	}
	
}