Smartupload+jsp+servlet实现文件上传下载

SmartUploadServlet.java

import java.io.*;

import java.util.*;

import javax.servlet.*;

import javax.servlet.http.*;

import com.jspsmart.upload.*;;

public class SmartUploadServlet extends HttpServlet {

private ServletConfig config;

//初始化Servlet

final public void init(ServletConfig config)

throws ServletException{

this.config=config;

}

//处理GET请求

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

this.doPost(request, response);

}

//响应POST请求

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

//获取PrintWriter对象

PrintWriter out = response.getWriter();

out.println("

Transitional//EN\">");

out.println("");

out.println("");

out.println("

");

out.println("

jspSmartUpload

");

out.println("

---

");

//新建一个SmartUpload对象

SmartUpload mySmartUpload=new SmartUpload();

try{

//上传初始化

mySmartUpload.initialize(config, request, response);

//设定每个上传文件的最大长度

mySmartUpload.setMaxFileSize(1*512*1024);

//设定总上传数据的长度

mySmartUpload.setTotalMaxFileSize(1*1024*1024);

//设定允许上传的文件的类型,只允许上传java,doc,txt文件

mySmartUpload.setAllowedFilesList("java,doc,txt");

//设定禁止上传的文件的类型,禁止上传带有exe,bat文件

mySmartUpload.setDeniedFilesList("exe,bat");

//上传文件

mySmartUpload.upload();

//将上传文件全部保存到指定目录

int count=mySmartUpload.save("/");

out.println(//利用Request对象获取参数之值

mySmartUpload.getRequest().getParameter("paramete")+" ");

//显示处理结果

out.println(""+count+" File Upload!
");

//处理每个上传文件

for(int i=0;i

{

com.jspsmart.upload.File file

=mySmartUpload.getFiles().getFile(i);

//判断用户是否选择了文件

if(!file.isMissing()){

//打印文件名

out.println("File Name: "

+file.getFileName()+"
");

//打印文件扩展名

out.println("File ExtName: "

+file.getFileExt()+"
");

//打印文件路径,包括目录

out.println("Path: "

+file.getFilePathName()+"
");

//另存到以Web应用程序的根目录为文件根目录的目录下

//(声明一下：在Myeclipse中，该目录位于工程下

的.metadata/.me_tcat/webapps/该工程目录/upload/)

file.saveAs("/upload/"+file.getFileName(),mySmartUpload.SAVE_VIRTUAL);

//另存到操作系统的根目录为文件根目录的目录下

file.saveAs("F:\\my

tool\\project\\SmartUpload\\temp\\"+file.getFileName(),

mySmartUpload.SAVE_PHYSICAL);

}

}

}catch(Exception e){//异常处理

//打印自定义异常信息

out.println("Unanable to upload the file.
");

out.println("Please Check The File Type");

}

out.println("

");

out.println("");

}

}

upload.jsp

<%@ page contentType="text/html;charset=gb2312"%>

jspSmartUpload组件文件上传

method="post" action="servlet/SmartUploadServlet">

bgcolor="snow">

上传文件1:
上传文件2:

SmartDownloadServlet.java

import java.io.*;

import java.util.*;

import javax.servlet.*;

import javax.servlet.http.*;

import com.jspsmart.upload.*;;

public class SmartDownloadServlet extends HttpServlet {

private ServletConfig config;

//初始化Servlet

final public void init(ServletConfig config)

throws ServletException{

this.config=config;

}

//处理GET请求

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

this.doPost(request, response);

}

//响应POST请求

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

//获取PrintWriter对象

//PrintWriter out = response.getWriter(); //这里会出现异常 out.println("");

out.println("");

out.println("");

out.println("

");

out.println("

jspSmartDownload

");

out.println("

---

");

//新建一个SmartUpload对象

SmartUpload mySmartUpload=new SmartUpload();

try{

//上传初始化

mySmartUpload.initialize(config, request, response);

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

//设定contentDisposition为null以禁止浏览器

//自动打开文件

//保证单击链接后是下载文件，若不设定，则

mySmartUpload.setContentDisposition(null);

//下载文件

mySmartUpload.downloadFile("/upload/"+fileName);

}catch(Exception e){//异常处理

//打印自定义异常信息

//out.println("Download Fail.
");

//out.println(e.toString());

//想要打印信息可参考下面的补充说明

}

//out.println("

");

//out.println("");

}

}

download.jsp

<%@ page contentType="text/html;charset=gb2312"%>

jspSmartUpload组件下载文件

method="post" action="servlet/SmartDownloadServlet">

bgcolor="snow">

文件1

文件2