servletSmartUpload

package com.baihe.web.admin;

import com.jspsmart.upload.SmartUpload;
import com.jspsmart.upload.SmartUploadException;
import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;

public class DownloadFile extends HttpServlet
{

    public DownloadFile()
    {
    }

    public final void init(ServletConfig config)
        throws ServletException
    {
        this.config = config;
    }

    public void destroy()
    {
        super.destroy();
    }

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

    public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException
    {
        String url = request.getParameter("url");
        int i = url.indexOf(".");
        String path = (new StringBuilder(String.valueOf(request.getSession().getServletContext().getRealPath("/")))).append("wordToPdf\\").append(url.substring(0, i)).append(".pdf").toString();
        SmartUpload su = new SmartUpload();
        su.initialize(config, request, response);
        su.setContentDisposition(null);
        try
        {
            su.downloadFile(path);
        }
        catch(SmartUploadException e)
        {
            e.printStackTrace();
        }
    }

    public void init()
        throws ServletException
    {
    }

    protected ServletConfig config;
}




在jsp中容易报异常,所以写到servlet里了，

（1）文件上传

Html代码 
1 <%@ page contentType="text/html;charset=UTF-8"%><%@ page import="com.soft4j.httpupload4j.SmartUpload"%><%@ page import="com.soft4j.bo.WebFileMgr"%><%  
2     String ret = null;  
3     SmartUpload su = null;  
4     try{  
5         su = new SmartUpload();  
6         su.initialize(pageContext);  
7         su.upload();  
8         ret = WebFileMgr.upload(su,pageContext);//WebFileMgr.java 处理文件上传  
9         if(ret!=null){   
10             out.print("successed");  
11         }  
12     }catch(Exception e){  
13         out.print("faild");  
14     }finally{  
15         su = null;  
16     }  
17 %> 


WebFileMgr.upload(su,pageContext)方法内容：
Java代码 
18   /**
19 * 上传方法.
20 * @param su
21 * @param pageContext
22 * @return
23 * @throws Exception
24 */ 
25   public static String upload(SmartUpload su,PageContext pageContext) throws Exception {  
26       com.soft4j.httpupload4j.File suFile = null;  
27       int fileCount = 0;  
28       int maxFileSize = 900;//单个文件最大为900K 
29       String AllowedExtensions=",jpg,jpeg,gif,png,";//允许上传的文件类型 
30       try {  
31             
32           for (int i=0; i<su.getFiles().getCount();i++) {  
33               suFile = su.getFiles().getFile(i);  
34               if (suFile.isMissing())  
35                   continue;  
36               fileSize = suFile.getSize()/1024;//字节转换成KB 
37               if(fileSize==0) fileSize=1;  
38  
39               if(maxFileSize<fileSize) throw new Exception("单个上传文件的容量不能超过["+maxFileSize+"KB]");  
40  
41               if (suFile.getFileExt() == null 
42                       || "".equals(suFile.getFileExt())) {  
43                   fileExt = ",,";  
44               } else {  
45                   fileExt = "," + suFile.getFileExt().toLowerCase() + ",";  
46               }  
47  
48               if (!"".equals(AllowedExtensions)  
49                       && AllowedExtensions.indexOf(fileExt) == -1) {  
50                   throw new Exception("您上传的文件[" + suFile.getFileName()  
51                           + "]的类型为系统禁止上传的文件类型，不能上传！");  
52               }  
53  
54               fileCount++;  
55           }  
56           if (fileCount==0) throw new Exception("请选择上传的文件");  
57  
58           StringBuffer fullFileName = null;//保存到服务器上的文件名(带路径) 
59           for (int i=0; i<su.getFiles().getCount();i++) {  
60               suFile = su.getFiles().getFile(i);  
61               if (suFile.isMissing()) continue;  
62               fullFileName = new StringBuffer("文件的路径");//填写 文件的路径 
63               fullFileName.append("文件名");//填写 文件名 
64               suFile.saveAs(fullFileName.toString(),SmartUpload.SAVE_PHYSICAL);  
65           }  
66           return "successed";  
67       } finally {  
68         // 
69       }  
70   } 


上面的JSP,Java代码就可以实现文件的上传.

（2）文件下载

下载相对更为简单,只要设定下载的文件名(带路径)就可以了.

Html代码 
71 <%@ page contentType="text/html;charset=UTF-8"%> 
72 <%@ page import="com.soft4j.httpupload4j.SmartUpload"%> 
73 <%  
74     //新建一个SmartUpload对象  
75     SmartUpload su = new SmartUpload();  
76     //初始化  
77     su.initialize(pageContext);  
78     //设定要下载的文件名（带路径）  
79     String fileName="下载的文件名";//文件名(带路径)  
80     try{  
81         su.downloadFile(fileName);//下载文件  
82     }catch(Exception e){  
83         e.printStackTrace();  
84         out.println(e.toString());  
85     }  
86     response.getOutputStream().close();  
87 %>