fileutil.java

一个eclipse插件源代码。用于web开发

/*
 * $Header: /home/cvs/WEBPUMP2.0/WebPumpIDE_Src/WebPumpIDE/src/com/webpump/ui/wizard/FileUtil.java,v 1.1.1.1 2004/07/01 09:07:54 wang_j Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2004/07/01 09:07:54 $
 *
 * ====================================================================
 *
 * The NanJing HopeRun(IT-FOREST) Software License, Version 2.0.0
 *
 * Copyright 2003-2004 by NanJing HopeRun(IT-FOREST) Information System Co., Ltd, CHINA and
 *                        IT Forest Corporation
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * HopeRun(IT-FOREST) Information System Co., Ltd, CHINA and IT Forest Corporation.
 * You shall not disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into with
 * HopeRun(IT-FOREST) Information System Co., Ltd, CHINA and IT Forest Corporation.
 */
package com.webpump.ui.wizard;


import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;


/**
 * Utility class for Files operation
 * @author wang_j
 * @version 2.0 2004-02-12 
 */
public class FileUtil {
	
	/**
	 * read String from a File object
	 * @param f File Object
	 * @return String read File
	 * @throws IOException
	 */
	public static String readTextFile(File f) throws IOException {
		
		StringBuffer buf = new StringBuffer();
		
		BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(f)));
		String inputLine;
		while ((inputLine = in.readLine()) != null) {
			buf.append(inputLine);
			buf.append('\n');
		}
		
		in.close();
		return buf.toString();
		
	}
	
	/**
	 * write String to a File Object
	 * @param f File Object
	 * @param content 
	 * @throws IOException
	 */
	public static void toTextFile(File f, String content) throws IOException {
		FileWriter out = new FileWriter(f);
		out.write(content);
		out.close();
	}
	
	/**
	 * copy file to other file
	 * @param inputFilename source file
	 * @param outputFilename target file
	 * @throws IOException
	 */
	public static void copy(String inputFilename, String outputFilename) throws IOException {
		FileUtil.copy(new File(inputFilename), new File(outputFilename));
	}

	/**
	 * copy file(direct) to other file(direct) 
	 * @param input  source file(direct)
	 * @param output target file(object)
	 * @throws IOException
	 */
	public static void copy(File input, File output) throws IOException {
		if(input.isDirectory() && output.isDirectory()) {
			FileUtil.copyDir(input, output);	
		} else {
			FileUtil.copyFile(input, output);	
		}
	}
	
	/**
	 * copy file to other file
	 * @param input  source file
	 * @param output target file
	 * @throws IOException
	 */
	public static void copyFile(File inputFile, File outputFile) throws IOException{ 
		try
		{
			BufferedInputStream fr = new BufferedInputStream(new FileInputStream(inputFile));
			BufferedOutputStream fw = new BufferedOutputStream(new FileOutputStream(outputFile));
			byte[] buf = new byte[8192];
			int n;
			while((n = fr.read(buf)) >= 0)
				fw.write(buf,0,n);
			fr.close();
			fw.close();
		}
		catch (Exception e)
		{
		}
    }
	
	/**
	 * copy direct to other direct
	 * @param inputDir
	 * @param outputDir
	 * @throws IOException
	 */
    public static void copyDir(File inputDir, File outputDir) throws IOException {
     	File[] files = inputDir.listFiles();
    	for(int i=0; i<files.length; i++) {
    		File destFile = new File(outputDir.getAbsolutePath() + File.separator + files[i].getName());
    		if(!destFile.exists()) {
				if(files[i].isDirectory()) {
		    		destFile.mkdir();
				}
    		}
    		FileUtil.copy(files[i], destFile);	
    	}
    }
    

	/**
	 * if have a *.extension file at a direct
	 * @param dir
	 * @param extension 
	 * @param recursive
	 * @return
	 */
	public static boolean dirContainsFiles(File dir, String extension, boolean recursive) {	
		File[] files = dir.listFiles();
		for(int i=0; i<files.length; i++) {
			if(files[i].isFile() && files[i].getName().endsWith(extension))
				return true;
			if(recursive && files[i].isDirectory())
				return FileUtil.dirContainsFiles(files[i], extension, recursive);
		}
		
		return false;	
	}

	/**
	 * read a property's value from an xml file by property
	 * @param file
	 * @param property
	 * @return
	 * @throws IOException
	 */
	public static String readPropertyInXMLFile(File file, String property) throws IOException {
		String content = FileUtil.readTextFile(file);
		int startTagIdx = content.indexOf("<" + property + ">");
		int endTagIdx = content.indexOf("</" + property + ">");
		if (startTagIdx == -1)
			throw new IOException("Property " + property + " not found in file " + file);
			
		return content.substring(startTagIdx + property.length() + 2, endTagIdx);	
	}
	
	/**
	 * remove a direct from file system
	 * @param dir
	 * @throws IOException
	 */
	public static void removeDir(File dir) throws IOException {
		File[] files = dir.listFiles();
		for (int i = 0; i < files.length; i++) {
			if(files[i].isDirectory()) {
				FileUtil.removeDir(files[i]);
			} else {
				files[i].delete();	
			}
		}
		dir.delete();
	}

	/**
	 * remove *.extension file from a direct
	 * @param dir
	 * @throws IOException
	 */
	public static void removeFile(File dir,String extension) throws IOException {
		File[] files = dir.listFiles();
		for (int i = 0; i < files.length; i++) {
			if(files[i].isDirectory()) {
				FileUtil.removeFile(files[i],extension);
			} else {
				if (files[i].getName().endsWith(extension))
				files[i].delete();	
			}
		}
	}

}