java随机读取文件的内容

来源：互联网发布：js 24小时时间插件编辑：程序博客网时间：2024/05/01 18:48

package com.wj.RandomAccessFile;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

public class RandomAccessFileDemo1 {

   public static void main(String[] args) {

       //writeFile();

       //readFile();

   }

   private static void readFile() throws FileNotFoundException, IOException {
       RandomAccessFile raf = new RandomAccessFile("d:\\test.txt", "r");
       //调整指针
       //raf.seek(8*1);

       //跳过指定字节数
       raf.skipBytes(8);

       byte [] buf = new byte[4];
       raf.read(buf);
       String name = new String(buf);
       int age = raf.readInt();

       System.out.println("name:" + name + " age:" + age);

       raf.close();
   }

   private static void writeFile() throws FileNotFoundException, IOException {
       RandomAccessFile raf = new RandomAccessFile("d:\\test.txt", "rw");

       raf.write("lisi".getBytes());
       raf.writeInt(98);
       raf.writeInt(258);

       raf.close();
   }

}

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