package?dofile;

import?java.io.*;

public?abstract?class?DoFile?{

	/**
	?*?@param?args
	?*/
	public?static?void?writeFile（String?fileNameString?text）{
		String?mfileName=“D:\\“+fileName+“.txt“;
		File?file=new?File（mfileName）;		
		try?{
			if?（!file.exists（））?file.createNewFile（）;
			FileWriter?fw=new?FileWriter（filetrue）;			
			BufferedWriter?output?=?new?BufferedWriter（fw）;			
			output.write（text）;
			output.write（“\r\n“）;
			
			output.close（）;
		}?catch?（IOException?e）?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace（）;
		}
	}
	//刪除試卷
	public?static?void?delFile（String?fileName）{
		String?mfileName=“D:\\“+fileName+“.txt“;
		File?file=new?File（mfileName）;
		try?{
			if?（!file.exists（））?file.createNewFile（）;
			FileWriter?fw=new?FileWriter（file）;			
			BufferedWriter?output?=?new?BufferedWriter（fw）;			
			output.write（““）;			
			
			output.close（）;
		}?catch?（IOException?e）?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace（）;
		}
	}
	//刪除一道指定的題
	public?static?void?delStringFromFile（String?fileNameString?delStr）{
		String?mfileName=“D:\\“+fileName+“.txt“;
		String?[]s=DoFile.readFile（fileName）;
		int?i=0;
		
		while（s[i]!=null）{
			if?（s[i].equals（delStr））?{
				s[i]=null;
				break;
			}
			i++;
		}	
		DoFile.delFile（fileName）;
		for（int?j=0;j<1000;j++）{
			if?（s[j]!=null）?DoFile.writeFile（fileName?s[j]）;
		}
	}
	//讀取文件，每行存在一個(gè)數(shù)組變量
	public?static?String[]?readFile（String?fileName）{
		String?mfileName=“D:\\“+fileName+“.txt“;
		String?[]str=new?String[1000];
		String?s=““;
		int?i=0;
		try?{
			BufferedReader?input?=?new?BufferedReader（new?FileReader（mfileName））;
			try?{
				while（（?s?=?input.readLine（））!=null）{?//判斷是否讀到了最后一行?
					str[i]=s;
					i++;
					}
			}?catch?（IOException?e）?{
				//?TODO?Auto-generated?catch?block
				e.printStackTrace（）;
			}?

		}?catch?（FileNotFoundException?e）?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace（）;
		}		
		return?str;
	}
}