dealfile.java

精通tomcat书籍原代码,希望大家共同学习

import java.io.*;

public class DealFile
{
	/**输入文件*/
	String infile = "";
	/**输出文件*/
	String outfile = "";
	/**输入文件流*/
	FileInputStream fis = null;
	/**输出文件流*/
	FileOutputStream fos = null;

	public DealFile()
	{
	}

    /**建立输入文件流*/
	public void connFIS(String i)
	{
		try
		{
			infile = i;
			fis = new FileInputStream(infile);
		}catch(IOException ioe){System.out.println("调用DealFile.connFIS()函数错误:\r\n"+ioe);}
	}

	//建立输出文件流*/
	public void connFOS(String o)
	{
		try
		{
			outfile = o;
			fos = new FileOutputStream(outfile);
		}catch(IOException ioe){System.out.println("调用DealFile.connFOS()函数错误:\r\n"+ioe);}
	}

	/**关闭输入文件流*/
	public void closeFIS()
	{
		try
		{
			if(fis!=null)fis.close();
		}catch(IOException ioe){System.out.println("调用DealFile.closeFIS()函数错误:\r\n"+ioe);}
	}

	/**关闭输出文件流*/
	public void closeFOS()
	{
		try
		{
			if(fos!=null)fos.close();
		}catch(IOException ioe){System.out.println("调用DealFile.closeFOS()函数错误:\r\n"+ioe);}
	}

	public byte[] readByte()
	{
		try{
			File f = new File(infile);
			byte b[]=new byte[(int)(f.length())];
			fis.read(b);
			return b;
		}catch(Exception e){return null;}
	}

	public static byte[] readByteofFile(String infile)
	{
		try{
			FileInputStream fis = new FileInputStream(infile);
			File f = new File(infile);
			byte b[]=new byte[(int)(f.length())];
			fis.read(b);
			fis.close();
			return b;
		}catch(Exception e){return null;}
	}

	public void writeByte(byte b[])
	{
		try{
			fos.write(b);
		}catch(Exception e){}
	}
	
};