src/com/util/upload.java

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package com.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;
import java.util.Map;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class upload extends ActionSupport
{
	private static final int BUFFER_SIZE = 16 * 1024;
	private File fujian;
	private String fujianFileName;
	private String fujianContentType;
	
	
	public String upload()
	{
		String newFujianName=new Date().getTime()+fujianFileName.substring(fujianFileName.indexOf("."));
		String dstPath = ServletActionContext.getServletContext().getRealPath("upload")+ "\\" + newFujianName;
		File dstFile = new File(dstPath);
		copy(this.getFujian(),dstFile);
		Map request=(Map)ServletActionContext.getContext().get("request");
		request.put("newFujianName", newFujianName);
		request.put("oldFujianName", fujianFileName);
		request.put("fujianPath", "/upload"+ "/" + newFujianName);
		return ActionSupport.SUCCESS;
	}
	
	
	private static void copy(File src, File dst) 
    {
        InputStream in = null;
        OutputStream out = null;
        try 
        {
            in = new BufferedInputStream(new FileInputStream(src), BUFFER_SIZE);
            out = new BufferedOutputStream(new FileOutputStream(dst),BUFFER_SIZE);
            byte[] buffer = new byte[BUFFER_SIZE];
            int len = 0;
            while ((len = in.read(buffer)) > 0) 
            {
                out.write(buffer, 0, len);
            }
        } 
        catch (Exception e)
        {
            e.printStackTrace();
        } 
        finally
        {