cmtout.java

一个java写的面向对象流的简单的文件系统,理论研究的吧

package tool;
import java.util.*;
import java.io.*;
//import active.*;
public class CmtOut {
	
	public static void main(String args[]){
		
		try{
			File file;
			File fileOut;
			FileWriter out;
			RandomAccessFile raf;
			file=new File("name.cmt");
			fileOut=new File ("out.txt");
			out=new FileWriter(fileOut);
			raf=new RandomAccessFile(file,"rw");
			out.write("当前处理的评论地址："+raf.readLong()+"\n");
			out.write("当前评论的末尾地址："+raf.readLong()+"\n");
			raf.seek(0);
			raf.writeLong(16);
			while(true){
				try{
				raf.seek(0);
				Long p1=raf.readLong();
		//		if(p1==raf.readLong())break;
				System.out.println("正在读取位置为："+p1+"的内容");
				raf.seek(p1);
				out.write("当前评论的活动："+raf.readUTF()+"\n");
				out.write("当前的评论员："+raf.readUTF()+"\n");
				out.write("当前评论的时间："+raf.readUTF()+"\n");
				out.write("当前评论的内容："+raf.readUTF()+"\n");
				Long p=raf.getFilePointer();
				raf.seek(0);
				raf.writeLong(p);
				out.flush();
				}catch(Exception e){
					System.out.println("获取下一评论时失败！");
					break;
				}
			}
			
			out.close();
			raf.close();
		}catch(Exception e){
		}
		
	}
}