Java 字节流与字符流（字节输入流：InputStream）

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

public class Demo {
	public static void main(String[] args) throws Exception {
		File file = new File("e:" + File.separator + "Demo" + File.separator + "TEST.txt");
		if (file.exists()) {
			InputStream in = new FileInputStream(file);
			byte data[] = new byte[1024];
			int foot=0;
			int len=0;
			while ((len=in.read())!=-1) {
				data[foot++]=(byte)len;
			}
			in.close();
			System.out.println("《"+new String(data, 0, foot)+"》");			
		}

	}
}import java.io.File;
import java.io.FileInputSt