基于SMB共享文件夹的上传于下载

需要用到的jar包   http://pan.baidu.com/s/1skQFk77

1.首先在一台电脑上设置共享文件夹

----上传下载的方法类

package com.strongit.tool.upload;
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 jcifs.smb.SmbFile;
import jcifs.smb.SmbFileInputStream;
import jcifs.smb.SmbFileOutputStream;

public class SMB {

	/**
     * 从本地上传文件到共享目录
     * @param remoteUrl 共享文件目录
     * @param localFilePath 本地文件绝对路径
     */  

	 public static void smbPut(String remoteUrl, String localFilePath)
	    {
	        InputStream in = null;
	        OutputStream out = null;
	        try
	        {
	            File localFile = new File(localFilePath);  

	            String fileName = localFile.getName();
	            SmbFile remoteFile = new SmbFile(remoteUrl+"/"+ fileName);
	            in = new BufferedInputStream(new FileInputStream(localFile));
	            out = new BufferedOutputStream(new SmbFileOutputStream(remoteFile));
	            byte[] buffer = new byte[1024];
	            while (in.read(buffer) != -1)
	            {
	                out.write(buffer);
	                buffer = new byte[1024];
	            }
	        }
	        catch (Exception e)
	        {
	            e.printStackTrace();
	        }
	        finally
	        {
	            try
	            {
	                out.close();
	                in.close();
	            }
	            catch (IOException e)
	            {
	                e.printStackTrace();
	            }
	        }
	    }  

	 	/**
	     * 从共享目录拷贝文件到本地
	     * @param remoteUrl 共享目录上的文件路径
	     * @param localDir 本地目录
	     */
	    public static void smbGet(String remoteUrl, String localFileStr)
	    {
	        InputStream in = null;
	        OutputStream out = null;
	        try
	        {
	            SmbFile remoteFile = new SmbFile(remoteUrl);
	            remoteFile.connect();
	            if (remoteFile == null)
	            {
//	                System.out.println("共享文件不存在");
	                return;
	            }
	            String fileName = remoteFile.getName();

	            localFileStr = localFileStr + fileName;

	            File localFile = new File(localFileStr); 

	            if(!localFile.exists())
	            {
	            	localFile.createNewFile();
	            }

	            in = new BufferedInputStream(new SmbFileInputStream(remoteFile));  

	            out = new BufferedOutputStream(new FileOutputStream(localFile));
	            byte[] buffer = new byte[1024];
	            while (in.read(buffer) != -1)
	            {
	                out.write(buffer);
	                buffer = new byte[1024];
	            }
	        }
	        catch (Exception e)
	        {
	            e.printStackTrace();
	        }
	        finally
	        {
	            try
	            {
	                out.close();
	                in.close();
	            }
	            catch (IOException e)
	            {
	                e.printStackTrace();
	            }
	        }
	    }  

}

　　

2.上传的类

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/*
 * smb协议
 * 上传文件到另一台局域网服务器
 * */
public class formservlet extends HttpServlet {

	//要将文件存储到远程服务器的存储地址
	//	smb://用户名：密码@地址/共享的目录
	private static final String remoteUrl ="smb://administrator:shichengzhe@192.168.2.112/gongxiang";

	public String getStr(String str)
	{
		String s=null ;
		if(str!=null)
		{
			try {
				s = new String(str.getBytes("ISO8859-1"),"gb2312");
			} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			System.out.println("转码出现错误");
			}
		}
		return s;
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		request.setCharacterEncoding("gb2312");
		response.setContentType("text/html;charset=gb2312");
		//设置合法的后缀名-可以添加需要上传的文件类型
		final String[] allowedatt = new String[] {"doc","docx","html","htm","txt","mp4"};
		//创建该对象
	    DiskFileItemFactory factory = new DiskFileItemFactory();
	    //上传文件所用到的缓冲区大小,超过此缓冲区的部分将被写入到磁盘
	    factory.setSizeThreshold(4*1024);
	    //使用fileItemFactory为参数实例化一个ServletFileUpload对象
	    ServletFileUpload upload = new ServletFileUpload(factory);
	     //要求上传的form-data数据不超过1000M
	    upload.setSizeMax(1000*1024*1024);
	    //java.util.List实例来接收上传的表单数据和文件数据
	    List itemList;
		try {
			itemList = upload.parseRequest(request);
			//迭代list中的内容
		    Iterator it = itemList.iterator();
		    //循环list中的内容
		    while(it.hasNext())
		    {
		    	 //取出一个表单域
		    	 FileItem item =(FileItem) it.next();
		    	 //如果不是普通表单，则代表是文件上传的表单
		    	 //获取上传文件的名字
		    	 String totalNameatt = getStr(item.getName());
		    	 //获取文件的后缀名
		    	 String suffixatt =  totalNameatt.substring(totalNameatt.lastIndexOf(".") + 1);
		    	 //判断后缀名是否是我们允许上传的类型
		    	 boolean isValide=false;
		    	 for(int i=0;i<allowedatt.length;i++)
		    	 {
			        if(suffixatt.equals(allowedatt[i])){
			        	isValide=true;
			        	break;
			        		}
			      }
		    	 //如果是不允许的类型，输出错误信息
		    	 if(!isValide)
		    	 {
		    		System.out.println(totalNameatt+"该文件类型不在允许上传的范围内");
		    		return ;
		    	 }
		    	 //如果是合法的，就保存该文件，文件名不变
		    	else
		    	{
		    		//获取项目根目录
		    		String rootPath = this.getServletConfig().getServletContext().getRealPath("/");
		    		//要存储的文件的绝对路径
		    		String filestr = rootPath +System.currentTimeMillis()+"."+suffixatt;
		    		File file = new File(filestr);
                                //获取选择上传文件的 存放到项目里面
		    		item.write(file);
                                //上传到服务器
		    		saveRemote(filestr);
                                //删除存放在目录里的上传文件
		    		file.delete();
		    	}

		    }

		} catch (FileUploadException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
	/*
	 * localFilePath 本地文件地址
	 * */
	public void saveRemote(String localFilePath)
	{

		SMB.smbPut(remoteUrl, localFilePath);
	}

}

　　

3.下载文件类

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ReadServlet extends HttpServlet {

	private static final String remoteUrl ="smb://administrator:shichengzhe@192.168.2.112/gongxiang";

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request,response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//获取要获得的文件名
		String filename = request.getParameter("filename");
		//拼凑要下载文件的绝对路径
		String fileUrl = remoteUrl + "/" + filename;
		//拼凑本地路径
		String root =this.getServletConfig().getServletContext().getRealPath("/");
		String localUrl = root+System.getProperty("file.separator")+filename;
		SMB.smbGet(fileUrl, localUrl);

		System.out.println("文件:"+localUrl+"下载成功");

	}

}

　　

4.jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
  </head>

  <body>
    <form action="servlet/formservlet" method="post" enctype="multipart/form-data" >
        <input type="file" id="file" name="file" /><br/>
        <input type="submit" value="提交" />
    </form>

              <!-- action? 要从服务器下载的文件 -->
    <a href="servlet/ReadServlet?filename=234234.doc">从远程服务器读取文件</a>
  </body>
</html>

5.web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>formservlet</servlet-name>
    <servlet-class>formservlet</servlet-class>
  </servlet>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>ReadServlet</servlet-name>
    <servlet-class>ReadServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>formservlet</servlet-name>
    <url-pattern>/servlet/formservlet</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>ReadServlet</servlet-name>
    <url-pattern>/servlet/ReadServlet</url-pattern>
  </servlet-mapping>

</web-app>

完整的smb文件上传与下载就完成了