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