bmpinfoheader.java

用java实现的对位图文件读取的源程序代码。

import java.util.HashMap;
import java.io.IOException;

public class BMPInfoHeader {
	//图象信息头

	public final static int PIXEL_BITS 		= 0X1C;
	public final static int COMPRESSION 	= 0X1E;
	public final static int BMP_DATA_SIZE 	= 0X22;
	public final static int H_RESOLUTION 	= 0X26;
	public final static int V_RESOLUTION 	= 0X2A;
	public final static int COLORS 			= 0X2E;
	public final static int IMPORTANT_COLORS= 0X32;
	
	
	public final static HashMap<Integer,Integer> lengthMap = new HashMap<Integer,Integer>(7);
	//set length  map 
	{
		lengthMap.put(PIXEL_BITS,2);
		lengthMap.put(COMPRESSION,4);
		lengthMap.put(BMP_DATA_SIZE,4);
		lengthMap.put(H_RESOLUTION,4);
		lengthMap.put(V_RESOLUTION,4);
		lengthMap.put(COLORS,4);
		lengthMap.put(IMPORTANT_COLORS,4);
	}
	
	private int pixelBits;
	private int compression;
	private int BMPDataSize;
	private int HResolution;
	private int VResolution;
	private int colorNum;
	private int importantColors;
	
	
	
	public void fill(BMPReader reader) throws IOException {
		pixelBits 		= reader.readData(PIXEL_BITS,		lengthMap.get(PIXEL_BITS));
		compression 	= reader.readData(COMPRESSION,		lengthMap.get(COMPRESSION));
		BMPDataSize 	= reader.readData(BMP_DATA_SIZE,	lengthMap.get(BMP_DATA_SIZE));
		HResolution 	= reader.readData(H_RESOLUTION,		lengthMap.get(H_RESOLUTION));
		VResolution 	= reader.readData(V_RESOLUTION,		lengthMap.get(V_RESOLUTION));
		colorNum 		= reader.readData(COLORS	,		lengthMap.get(COLORS));
		importantColors = reader.readData(IMPORTANT_COLORS,	lengthMap.get(IMPORTANT_COLORS));
	}
	
	

	public String toString() {
		return "(pixelBits=" 		+ pixelBits 		+ "," + 
				"compression=" 		+ compression		+ "," + 
				"BMPDataSize=" 		+ BMPDataSize		+ "," + 
				"HResolution=" 		+ HResolution		+ "," + 
				"VResolution=" 		+ VResolution		+ "," + 
				"colorNum=" 		+ colorNum 			+ "," + 
				"importantColors=" 	+ importantColors 	+ ")" ;
	}
	
	public String toString16() {
		return "(pixelBits=" 		+ Integer.toHexString(pixelBits) 		+ "," + 
				"compression=" 		+ Integer.toHexString(compression)		+ "," + 
				"BMPDataSize=" 		+ Integer.toHexString(BMPDataSize)		+ "," + 
				"HResolution=" 		+ Integer.toHexString(HResolution) 		+ "," + 
				"VResolution=" 		+ Integer.toHexString(VResolution)		+ "," + 
				"colorNum=" 		+ Integer.toHexString(colorNum) 		+ "," + 
				"importantColors=" 	+ Integer.toHexString(importantColors) 	+ ")" ;
	}
	
	
	public int getPixelBits() {
		return pixelBits;
	}

	public void setPixelBits(int aPixelBits) {
		pixelBits = aPixelBits;
	}

	public int getCompression() {
		return compression;
	}

	public void setCompression(int aCompression) {
		compression = aCompression;
	}

	public int getBMPDataSize() {
		return BMPDataSize;
	}

	public void setBMPDataSize(int aBMPDataSize) {
		BMPDataSize = aBMPDataSize;
	}

	public int getHResolution() {
		return HResolution;
	}

	public void setHResolution(int aHResolution) {
		HResolution = aHResolution;
	}

	public int getVResolution() {
		return VResolution;
	}

	public void setVResolution(int aVResolution) {
		VResolution = aVResolution;
	}

	public int getColorNum() {
		return colorNum;
	}

	public void setColorNum(int aColorNum) {
		colorNum = aColorNum;
	}

	public int getImportantColors() {
		return importantColors;
	}

	public void setImportantColors(int anImportantColors) {
		importantColors = anImportantColors;
	}
	
	
	public static void main(String[] args) throws Exception {
		String fileName = "girl.bmp";
		String mode = "rw";
		BMPReader reader = new BMPReader(fileName,mode);
		BMPInfoHeader aBMPInfoHeader = new BMPInfoHeader();
		
		aBMPInfoHeader.fill(reader);	
		System.out.println(aBMPInfoHeader);
		
	}
}