一、簡介

SmartUpload一種java上傳元件包，可以輕鬆的實現檔案的上傳及下載功能。

使用該元件可以輕鬆的實現上傳檔案的限制，也可以輕易的取得檔案上傳的名稱、字尾、大小等。

三、具體實現例子【jsp+SmartUpload】

專案目錄

web.xml配置

<?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">
  <display-name></display-name>
  <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>SmartUploadServlet</servlet-name>
    <servlet-class>com.wuhn.smartupload.servlet.SmartUploadServlet</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>SmartDownloadServlet</servlet-name>
    <servlet-class>com.wuhn.smartupload.servlet.SmartDownloadServlet</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>BatchSmartDownloadServlet</servlet-name>
    <servlet-class>com.wuhn.smartupload.servlet.BatchSmartDownloadServlet</servlet-class>
  </servlet>

  <!-- 上傳servlet -->	
  <servlet-mapping>
    <servlet-name>SmartUploadServlet</servlet-name>
    <url-pattern>/SmartUploadServlet.do</url-pattern>
  </servlet-mapping>
  <!-- 下載servlet -->	
  <servlet-mapping>
    <servlet-name>SmartDownloadServlet</servlet-name>
    <url-pattern>/SmartDownloadServlet.do</url-pattern>
  </servlet-mapping>
  <!-- 批量下載servlet -->	
  <servlet-mapping>
    <servlet-name>BatchSmartDownloadServlet</servlet-name>
    <url-pattern>/BatchSmartDownloadServlet.do</url-pattern>
  </servlet-mapping>	
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>
 

SmartUploadServlet.java

package com.wuhn.smartupload.servlet;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;

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

import com.jspsmart.upload.SmartUpload;
import com.jspsmart.upload.SmartUploadException;

/**
 * @author wuhn
 * @建立時間 2015-12-08
 * @功能 SmartUpload 上傳 
 * **/
public class SmartUploadServlet extends HttpServlet {

	/**
	 * The doGet method of the servlet. 
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request,response);//預設post
		
	}

	/**
	 * The doPost method of the servlet. 
	 *
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//設定上傳檔案儲存路徑
		String filePath = getServletContext().getRealPath("/")+"images";
		File file = new File(filePath);
		if(!file.exists()){
			file.mkdir();
		}
		
		SmartUpload smartUpload = new SmartUpload();
		//初始化物件
		smartUpload.initialize(getServletConfig(), request, response);
		//設定上傳檔案
		smartUpload.setMaxFileSize(1024*1024*10);
		//設定所有檔案的大小
		smartUpload.setTotalMaxFileSize(1024*1024*100);
		//設定檔案的型別
		smartUpload.setAllowedFilesList("txt,jpg,gif");
		String result = "上傳成功！";
		//設定禁止上傳的檔案型別
		try {
			smartUpload.setDeniedFilesList("rar,jsp,js");
			//上傳檔案
			smartUpload.upload();
			//儲存檔案
			int count = smartUpload.save(filePath);		
		} catch (Exception e) {
			//捕捉Exception異常 ，不然捕捉到異常
			result = "上傳失敗！";
			if(e.getMessage().indexOf("1015") != -1){
				result = "上傳失敗：上傳檔案型別不正確！";
			}else if (e.getMessage().indexOf("1010") != -1) {
				result = "上傳失敗：上傳檔案型別不正確！";
			}else if (e.getMessage().indexOf("1105") != -1) {
				result = "上傳失敗：上傳檔案大小大於允許上傳的最大值！";
			}else if (e.getMessage().indexOf("1110") != -1) {
				result = "上傳失敗：上傳檔案總大小大於允許上傳總大小的最大值！";
			}
			e.printStackTrace();
		}
		
		//獲取上傳檔案的屬性
		for(int i=0;i<smartUpload.getFiles().getCount();i++){
			com.jspsmart.upload.File tempFile = smartUpload.getFiles().getFile(i);
			System.out.println("***************");
			System.out.println("表單中name的值："+tempFile.getFileName());
			System.out.println("上傳檔名："+tempFile.getFileName());
			System.out.println("上傳檔案大小："+tempFile.getSize());
			System.out.println("上傳檔案的拓展名："+tempFile.getFileExt());
			System.out.println("上傳檔案全名："+tempFile.getFilePathName());
			System.out.println("***************");
		}
		
		System.out.println("上傳結果："+result);
		request.setAttribute("result", result);
		request.getRequestDispatcher("/jsp/01.jsp").forward(request, response);
		
		
	}

}
 

package com.wuhn.smartupload.servlet;

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;

import com.jspsmart.upload.SmartUpload;
import com.jspsmart.upload.SmartUploadException;

/**
 * @author wuhn
 * @建立時間 2015-12-08
 * @功能 SmartUpload 下載 
 * **/
public class SmartDownloadServlet extends HttpServlet {

	/**
	 * The doGet method of the servlet. <br>
	 *
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request,response);
		
	}

	/**
	 * The doPost method of the servlet. <br>
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String result = "下載成功";
		//獲取下載的檔名
		String filename = request.getParameter("filename");
		//下載
		SmartUpload smartUpload = new SmartUpload();
		smartUpload.initialize(getServletConfig(), request, response);
		smartUpload.setContentDisposition(null);//取消預設開啟方式
		try {
			smartUpload.downloadFile("/images/"+filename);
		} catch (Exception e) {
			result = "下載失敗";
			System.out.println("********異常處理********");
			if(e.getMessage().indexOf("系統找不到指定的路徑。") != -1){
				result = "下載失敗:檔案不存在！";
			}
			e.printStackTrace();
		}
		
		request.setAttribute("result", result);
		request.getRequestDispatcher("/jsp/02.jsp").forward(request, response);
		
		
	}

}
 

package com.wuhn.smartupload.servlet;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

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

/**
 * @author wuhn
 * @建立時間 2015-12-09
 * @功能 SmartUpload 批量下載
 * **/
public class BatchSmartDownloadServlet extends HttpServlet {

	/**
	 * The doGet method of the servlet. 
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request,response);
		
	}

	/**
	 * The doPost method of the servlet. 
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//設定下載相應資訊
		response.setContentType("application/x-msdownload");
		response.setHeader("Content-Disposition", "attachment;filename=test.zip");
		
		//下載路徑
		String path = getServletContext().getRealPath("/")+"images/";
		//獲取下載的所有檔名
		String[] filenames = request.getParameterValues("filename");
		String str = "";
		String rt = "\r\n";
		//設定壓縮資訊
		ZipOutputStream zipOutputStream = new ZipOutputStream(response.getOutputStream());
		//獲取需要下載的檔案
		for(String filename:filenames){
			str += filename + rt;
			File file = new File(path + filename);
			zipOutputStream.putNextEntry(new ZipEntry(filename));//加入壓縮檔案
			FileInputStream fileInputStream = new FileInputStream(file);
			byte b[] = new byte[1024];
			int n=0;
			while ((n=fileInputStream.read(b)) != -1) {
				zipOutputStream.write(b, 0, n);
			}
			zipOutputStream.flush();
			fileInputStream.close();
		}
		
		zipOutputStream.setComment("download success:" + rt +str);//zip註釋資訊
		zipOutputStream.flush();
		zipOutputStream.close();
		
		
	}

}

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE>
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  
  <body>
    <a target="_blank" href="<%=path%>/jsp/01.jsp">上傳01</a>
    <br>
    <a target="_blank" href="<%=path%>/jsp/02.jsp">下載02</a>
    <br>
    <a target="_blank" href="<%=path%>/jsp/03.jsp">批量下載03</a>
  </body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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>SmartUpload_批量上傳</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    <form action="<%=path%>/SmartUploadServlet.do" method="post" enctype="multipart/form-data">
  		上傳檔案1：<input id="myfile1" name="myfile1" type="file"/><br>
  		上傳檔案2：<input id="myfile2" name="myfile2" type="file"/><br>
  		上傳檔案3：<input id="myfile3" name="myfile3" type="file"/>
  		<input type="submit" value="提交"  />  ${result}
  	</form>
  </body>
</html>

02.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE>
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP '02.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    下載：<a href="<%=path %>/SmartDownloadServlet.do?filename=jplin-css.jpg">檔案</a>  ${result}
  </body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE>
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>批量下載</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    	<h3>批量下載</h3>
    	<form action="<%=path %>/BatchSmartDownloadServlet.do" method="post">
	    	<input type="checkbox" name="filename" value="jplugin-css.jpg"/>jplugin-css.jpg<br>
	    	<input type="checkbox" name="filename" value="jplugin-multiple.jpg"/>jplugin-multiple.jpg<br>
	    	<input type="checkbox" name="filename" value="jplugin-nocss.jpg"/>jplugin-nocss.jpg<br>
	    	
	    	<input type="submit" value="提交">
    	</form>
    	
    	
  </body>
</html>