util.java

apriori算法 特别有用 主要用JAVA编写的

/*从文件中读取数据，并排序存入*/
import java.io.*;
import java.util.ArrayList;
public class Util 
{
	public static ArrayList getList(String fileName)
	{
		try
		{
			ArrayList inputList = new ArrayList();
			FileReader fr = new FileReader(fileName);
			BufferedReader br = new BufferedReader(fr);
			String strLine=br.readLine();
			while (strLine!=null)
			{
				
				inputList.add(strLine);
				
				strLine=br.readLine();
			}	
			
			br.close();
			return inputList;
		}
		catch(Exception e)
		{
			e.printStackTrace(System.err);
		}
		return null;
	}
	
	public static void writeFile(String str, String fileName)
	{
		try
		{
			File fw = new File(fileName);
			BufferedWriter bf = new BufferedWriter( new FileWriter(fw));
			
			bf.write(str);
			bf.flush();
			bf.close();
			
		}
		catch(IOException e)
		{
			System.out.println("File write fail!");
		}
	}
/*	public static void main(String[] args)
	{
		writeFile("test","d:\\output.txt");
	}*/
}