io.java

一个完整的代码管理系统的源代码

/*
 * Copyright (c) 2007-2010 Tanming1003 Inc.
 * All rights reserved.
 * 
 * tanming1003<[e-mail]>
 * 
 * 
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions 
 * are met:
 * 
 * Redistributions of source code must retain the above copyright 
 * notice, this list of conditions and the following disclaimer. 
 * Redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the following disclaimer in the 
 * documentation and/or other materials provided with the distribution. 
 * Neither the name of tanming1003 nor the names of its contributors 
 * may be used to endorse or promote products derived from this 
 * software without specific prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
 * REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 */
package hunnu.edu.cn.product.common.upload;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Array;

/**
 * @author tanming1003
 * @date Dec 19, 2007
 * @time 4:26:32 PM
 * @project_name Insurance
 * @package_name org.tan.ming.util
 * @file_name    IO.java
 * @version      1.0
 */
public class IO
{
    public static void writeFile(InputStream in,File file)
    {
    	try
    	{
    		ByteArrayOutputStream baos=new ByteArrayOutputStream();
    		byte[] b=new byte[1];
    		while(in.read(b)!=-1)
    		{
    			baos.write(b);
    		}
    		FileOutputStream fos=new FileOutputStream(file);
    		baos.writeTo(fos);
    		fos.flush();
    		baos.close();
    		fos.close();
    		baos=null;
    		fos=null;
    	}
    	catch(IOException e)
    	{
    		e.printStackTrace();
    	}
    }
    
    public static void writeFile(String string,File file)
    {
    	byte[] b=string.getBytes();
    	ByteArrayInputStream in=new ByteArrayInputStream(b);
    	writeFile(in,file);
    }
    
    public static void writeFile(String string,String path)
    {
    	File file=new File(path);
    	writeFile(string,file);
    }
    
    public static void copyIO(InputStream in,OutputStream out)
    {
    	byte[] bi=new byte[1024];
    	int n;
    	try
		{
			while((n=in.read(bi,0,bi.length))!=-1)
			{
				out.write(bi,0,n);
			}
			in.close();
			out.flush();
			out.close();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
    }
    
    public static void copyIO(InputStream in,OutputStream out,int bufferSize)
    {
    	byte[] bi=new byte[bufferSize];
    	int n;
    	try
		{
			while((n=in.read(bi,0,bi.length))!=-1)
			{
				out.write(bi,0,n);
			}
			in.close();
			out.flush();
			out.close();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
    }
    
    @SuppressWarnings("unchecked")
	public static Object arrayResize(Object ary,Class elements,int size)
    {
    	Object o=Array.newInstance(elements, size);
    	int len=Array.getLength(ary);
    	System.arraycopy(ary, 0, o, 0, (len<size?len:size));
    	return o;
    }
}