比较两个文件是否一样

		File inputFile = new File("C:\\0001.DAT");
		File outputFile = new File("C:\\0002.DAT");
		
		FileInputStream in;
		FileInputStream out;
		try {
			in = new FileInputStream(inputFile);
			out = new FileInputStream(outputFile);
		
			int i;
			int j = 0;
			while ((i = in.read()) != -1) {
				j++;
				byte inByte = (byte) i;
				byte outByte = (byte) out.read();
				if (inByte != outByte) {
					System.out.println("in===="+j);
				}
			}
		}
		catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}