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文件上传与下载（二）smartupload

2015-06-09 21:58 465 查看

下载smartupload jar包

jsp前台页面

<%@ 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>My JSP '01.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="css/common.css" />
<script type="text/javascript" src="js/jquery-1.11.1.js"></script>
<script type="text/javascript">
$(function(){
$(".thumbs a").click(function(){
var largePath  = $(this).attr("href");
var largeAlt = $(this).attr("title");
$("#largeImg").attr({
src : largePath,
alt : largeAlt
});
return false;
});

});
</script>
</head>

<body>
<h2>  文件批量上传   </h2>
<form action="smartUploadServlet.do" method="post" enctype="multipart/form-data">
上传文件1：<input type="file" name="myfile1"><br>
上传文件2：<input type="file" name="myfile2"><br>
上传文件3：<input type="file" name="myfile3"><br>
<input type="submit" value="提交">${result}
</form>
<hr>
下载：<a href="smartDownloadServlet.do?filename=img2-lg.jpg">img2-lg.jpg</a>
<h2>文件批量下载</h2>
<form action="batchDownloadServlet.do">
<input type="checkbox"  name="filename" value="img2-lg.jpg">Image2
<input type="checkbox"  name="filename" value="img3-lg.jpg">Image3
<input type="checkbox"  name="filename" value="img4-lg.jpg">Image4
<input type="submit" value="下载">
</form>
<hr>
<h2>图片预览</h2>
<p><img id="largeImg" src="images/img1-lg.jpg" alt="Large Image"/></p>
<p class="thumbs">
<a href="images/img2-lg.jpg" title="Image2"><img src="images/img2-thumb.jpg"></a>
<a href="images/img3-lg.jpg" title="Image3"><img src="images/img3-thumb.jpg"></a>
<a href="images/img4-lg.jpg" title="Image4"><img src="images/img4-thumb.jpg"></a>
<a href="images/img5-lg.jpg" title="Image5"><img src="images/img5-thumb.jpg"></a>
<a href="images/img6-lg.jpg" title="Image6"><img src="images/img6-thumb.jpg"></a>
</p>
</body>
</html>

servlet上传页面

SmartUploadServlet.java

package com.imooc.servlet;

import java.io.File;
import java.io.IOException;
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;

public class SmartUploadServlet extends HttpServlet {

public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req,resp);
}

public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
//设置上传文件保存路径
String filePath = getServletContext().getRealPath("/") + "images";
File file = new File(filePath);
if(!file.exists()){
file.mkdir();
}

SmartUpload su = new SmartUpload();
//初始化对象
su.initialize(getServletConfig(), req, resp);
//设置上传文件大小
su.setMaxFileSize(1024*1024*10);
//设置所有文件的大小
su.setTotalMaxFileSize(1024*1024*100);
//设置允许上传文件类型
su.setAllowedFilesList("txt,jpg,gif");
String result = "上传成功！";
//设置禁止上传的文件类型
try {
su.setDeniedFilesList("rar,jsp,js");
//上传文件
su.upload();
int count = su.save(filePath);
System.out.println("上传成功" +  count + "个文件！");
} catch (Exception e) {
result = "上传失败！";
if(e.getMessage().indexOf("1015") != -1){
result = "上传失败:上传文件类型不正确！";
}else if (e.getMessage().indexOf("1010") != -1){
result = "上传失败:上传文件类型不正确！";
}else if (e.getMessage().indexOf("1105") != -1){
result = "上传失败:上传文件大小大于允许上传的最大值！";
}else if (e.getMessage().indexOf("1110") != -1){
result = "上传失败:上传文件总大小大于允许上传总大小的最大值！";
}
e.printStackTrace();
}

req.setAttribute("result", result);
req.getRequestDispatcher("jsp/02.jsp").forward(req, resp);
}

}

下载页面单个下载

SmartDownloadServlet.java

package com.imooc.servlet;

import java.io.IOException;

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;

public class SmartDownloadServlet extends HttpServlet {

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

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

String filename = request.getParameter("filename");

SmartUpload su = new SmartUpload();
su.initialize(getServletConfig(), request, response);
su.setContentDisposition(null);
try {
su.downloadFile("/images/"+ filename);
} catch (SmartUploadException e) {
e.printStackTrace();
}
}

}

文件批量打包下载

BatchDownloadServlet.java

package com.imooc.servlet;

import java.io.IOException;

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;

public class SmartDownloadServlet extends HttpServlet {

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

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

String filename = request.getParameter("filename");

SmartUpload su = new SmartUpload();
su.initialize(getServletConfig(), request, response);
su.setContentDisposition(null);
try {
su.downloadFile("/images/"+ filename);
} catch (SmartUploadException e) {
e.printStackTrace();
}
}

}

完整代码下载

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