tool.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 active.*;
import java.io.*;
import java.util.*;
class Tool {
	RandomAccessFile raf;
	FileWriter out=null;
	public Tool(){
		
	}
	public static void main(String args[]){
		(new Tool()).readFormFileInr();
	}
	public void readFormFileInr(){
		
		File file;
		File fileOut;
		try{
		file=new File("Active.inr");
	 fileOut=new File("result.txt");
			if(!file.exists()){
				System.out.println("系统文件不存在");
				return ;
			}
			if(!fileOut.exists()){
				fileOut.createNewFile();
				out=new FileWriter(fileOut);
			}
			raf=new RandomAccessFile(file,"r");
			out.write("当前活动文件区首址："+raf.readLong()+"\n");
			out.write("文件尾址为："+raf.readLong()+"\n");
			out.write("当前活动块总数为："+raf.readInt()+"\n");
			int k=raf.readInt();
			out.write("文件头指示区的大小为："+k+"\n");
			Long hE=raf.readLong();
			out.write("文件尾指示区尾址为："+hE+"\n");
			for(int i=0;i<k;i++){
			out.write("活动块的首址为："+raf.readLong()+"\n");
			}
			raf.seek(832);
			while(true){
				int s=raf.readInt();
				out.write("当前活动的总数"+s);	
				Long prePostion=raf.readLong();
				out.write("当前活动前一个活动的首址"+prePostion+"\n");
				if(s==0)break;
				for(int i=0;i<s;i++){//获取当前活动的数目
					Active active=new Active();
					out.write("................................\n");
					out.write("活动"+i+"状态为"+raf.readInt()+"\n");
					out.write("活动名为："+raf.readUTF()+"\n");
					out.write("活动的时间为："+raf.readUTF()+"\n");
					out.write("活动的组织人员:"+"\n");
					for(int j=0;j<raf.readInt();j++){
						out.write(j+":"+raf.readUTF()+"\n");
					}
					out.write("活动的图片:"+"\n");
					for(int j=0;j<raf.readInt();j++){
						out.write(j+":"+raf.readUTF()+"\n");
					}
					out.write("活动的内容为："+raf.readUTF()+"\n");
					out.write("活动的评论为："+raf.readUTF()+"\n");	
				}
			}
			raf.close();
			out.close();
		}catch(Exception e){
			System.out.println(e);
			System.out.println("系统读取文件错误！");
		}
	}
}