java 获取 rtf文件 页数 java 获取文件字节数

Java读取文件内容（多个字节）

package com.ycy1;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

public class Test02 {
	public static void main(String[] args) {
		// 读取文件，多个字节
		FileInputStream fileInputStream = null;
		try {
			fileInputStream = new FileInputStream("E:" + File.separator + "test.txt");
			byte[] b = new byte[4];
			// fileInputStream.read(b)返回有效字节的长度
			//int read = fileInputStream.read(b);
			//System.out.println("字节长度:" + read);
			int len = 0;
			while ((len = fileInputStream.read(b)) != -1) {
				String string = new String(b, 0, len);
				System.out.println(string);

			}

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			System.out.println(e.toString());
		} catch (IOException e) {
			System.out.println(e.toString());
		} finally {
			if (fileInputStream != null) {
				try {
					fileInputStream.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}

	}
}