jsp多文件上传遇到问题

Question

  这是我的Action  不知道为什么，上传到目录的时候，都是一个叫Content-Disposition的空白文件，0KB,不知道为什么
package uppower.action;import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;public class UploadAction extends Action { public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
//jsp文件上传源码，单一或多文件也可与其他标单类型混杂使用，可不限制上传大小，速度一流 
//作者：jjcc   2007.10.26
/*Connection con=DriverManager.getConnection("org.gjt.mm.mysql.Driver","gonglin","gonglin");
Statement St_xh=con.createStatement();
//设置上传服务器路径
String mypath_m =application.getRealPath("D:\\temp\\");
if((System.getProperty("os.name").toLowerCase().indexOf("sun"))>-1)
{
   mypath_m+="/docup/";
}
else
{
   mypath_m+="\\docup\\";
}
*/
String[][] arr_param = new String[20][2]; //可以存放20个参数的数组
int param_len=0; //参数数组的长度
String message= ""; //出错信息
String folder = ""; //文件夹参数
char[]   hchl={13,10}; //char(10)表示回车 char(13)表示换行
String   boundary=request.getContentType().substring(30); 
String   field_boundary="--"+boundary+new   String(hchl); 
String   last_boundary="--"+boundary+"--"+new   String(hchl);
System.out.println("boundary: "+boundary);
//System.out.println("field_boundary: "+field_boundary);
//System.out.println("hchl: "+new   String(hchl));
ServletInputStream   getdata=request.getInputStream(); //客户端的输入流
ByteArrayOutputStream   temp=new   ByteArrayOutputStream(); //建立临时2进制输出流
byte[]   data_line=new   byte[8192]; //临时读取字符数组
int   line_byte_count=0; //一次读入的字节数
boolean   found_boundary=false; //边界标志
while((line_byte_count=getdata.readLine(data_line,0,data_line.length))!=-1){ //读入第一个文件分割符
        if(!found_boundary){ 
                line_byte_count=getdata.readLine(data_line,0,data_line.length); 
        } 
        String   temp_str=new   String(data_line,0,line_byte_count); //将读入的字节形成字符串
        //System.out.println("temp_str: "+temp_str);
        if(temp_str.indexOf("filename")!=-1){    //读入的是file数据
                if(temp_str.substring(temp_str.indexOf("filename=")+9,temp_str.lastIndexOf("\"")+1).length()> 2){ 
                        String   file_name=new String(temp_str.substring(temp_str.lastIndexOf("\\")+1,temp_str.lastIndexOf("\"")).getBytes("ISO8859_1"),"EUC-CN"); 
                        
                        /*//对文件名的处理
                        if(file_name.matches("^.*缓凝.+$")) {
                        file_name = "HNJ.xls";
                        System.out.println("file_name: "+file_name);
                        }
                        else if(file_name.matches("^.*减阻.+$")) {
                        file_name = "JZJ.xls";
                        System.out.println("file_name: "+file_name);
                        }
                        else if(file_name.matches("^.*降失水.+$")) {
                        file_name = "JSSJ.xls";
                        System.out.println("file_name: "+file_name);
                        }
                        else if(file_name.matches("^.*水泥质检.+$")) {
                        file_name = "SNZJ.xls";
                        System.out.println("file_name: "+file_name);
                        }
                        else if(file_name.matches("^.*取样.+$")) {
                        file_name = "QY.xls";
                        }
                        */
                        line_byte_count=getdata.readLine(data_line,0,data_line.length); //跳过Content-Type信息
                        line_byte_count=getdata.readLine(data_line,0,data_line.length); //文件信息第一行
                        
                        //在服务器端生成文件
                        /*ResultSet Rst_xh=St_xh.executeQuery("select to_char(sysdate,'yyyymmddhh24miss') xh from dual");
                        Rst_xh.next();
        String f_xh=Rst_xh.getString("xh");
           Rst_xh.close();
        folder += mypath_m +f_xh+file_name+"@";
        */
                        FileOutputStream   myfile=new   FileOutputStream("d:\\temp\\"+file_name,false); 
                        boolean   test=true; //在此文件中的标志
                        while(test)   { 
                                line_byte_count=getdata.readLine(data_line,0,data_line.length); 
                                if(line_byte_count==-1){ //到文件流的末尾，退出
                                        test=false; 
                                        break; 
                                } 
                                if(temp.size()==0){ //使用 空的 临时2进制输出流
                                        temp.write(data_line,0,line_byte_count); 
                                }else{ 
                                        if(new   String(data_line,0,line_byte_count).equals(field_boundary)   || new   String(data_line,0,line_byte_count).equals(last_boundary)){ 
                                                //如果是文件分隔符 
                                                myfile.write(temp.toByteArray(),0,temp.toByteArray().length-2); //去掉最后的回车换行符
                                                temp.reset(); //清空临时2进制输出流
                                                myfile.close(); 
                                                System.out.println(file_name+"上传成功了 <br> "); message += "上传成功了";
                                                test=false; 
                                                found_boundary=true; 
                                        }else{ 
                                                temp.writeTo(myfile); 
                                                temp.reset(); 
                                                temp.write(data_line,0,line_byte_count); 
                                        } 
                                } 
                        } 
                }else{ //读入的不是文件
                        String   field_name=temp_str.substring(temp_str.indexOf("name")+6,temp_str.lastIndexOf(";")-1); 
                        line_byte_count=getdata.readLine(data_line,0,data_line.length); 
                        
                        line_byte_count=getdata.readLine(data_line,0,data_line.length); 
                       
                        line_byte_count=getdata.readLine(data_line,0,data_line.length); 
                       
                        line_byte_count=getdata.readLine(data_line,0,data_line.length); 
                        found_boundary=true; 
                        message = field_name+"没有选择上传文件！ \\n "; 
                        
                } 
        }   else{ //不是文件部分
                String   field_name=temp_str.substring(temp_str.indexOf("name")+6,temp_str.lastIndexOf("\"")); 
                line_byte_count=getdata.readLine(data_line,0,data_line.length); //跳过Content-Type
                temp.reset(); 
                boolean   test=true; 
                while(test)   { 
                        line_byte_count=getdata.readLine(data_line,0,data_line.length); 
                        if(line_byte_count==-1){ 
                                test=false; 
                                break; 
                        } 
                        if(new   String(data_line,0,line_byte_count).equals(field_boundary)   ||   new   String(data_line,0,line_byte_count).equals(last_boundary)){ 
                                test=false; 
                                found_boundary=true; 
                                if(temp.size()> 2){ 
                                        arr_param[param_len][0]=field_name;
                                        arr_param[param_len][1]=new   String(temp.toByteArray()).substring(0,new   String(temp.toByteArray()).length()-2);
                                        param_len++;
                                }else{ 
                                        arr_param[param_len][0]=field_name;
                                        arr_param[param_len][1]="null";
                                        param_len++;
                                } 
                                temp.reset(); 
                        }else{ 
                                temp.write(data_line,0,line_byte_count); //temp里存放的是data_line上一次读入的数据
                        } 
                } 
        } 
        
} 
getdata.close();
for(int i=0;i < param_len;i++) {
System.out.println(arr_param[i][0]+" = "+arr_param[i][1]);
}
System.out.println("folder: "+folder);
return mapping.findForward("success");
}}
 这段就是在网上找的，我自己改了一些，就不行了，不知道为什么 JSP文件里面是这样的<%@ page language="java" contentType="text/html;charset=GBK"%>
<%@ page import="java.util.*" %>
<%@ page import="org.apache.commons.fileupload.*"%><%pageContext.setAttribute("jsp.tags.reuse", new Boolean(false));%>
<A:navigation/>
<hr>
<center><b><font size=+1><bean:message key="upload.name"/></font></b></center>
<html>
<head>
 <title>????</title>
</head>
<body><form action="<%=request.getContextPath() %>/UploadAction.do" name="one" enctype="multipart/form-data" method="post"><p align="center">文件上传
  <input type="File" name="fileupload" value="upload" />
  <input type="submit" value="上传">
  <input type="reset" value="取消">
  </p>
</form>
</body>
</html>希望朋友们帮我看一下，我们正在做一个参加学校比赛的项目，谢谢了

Answer 1

我用的是apache的fileupload上传组件，没有直接处理，前台是随便的，后台你可以参考我的源码，
用到的组件可以在apache上下载http://commons.apache.org/fileupload/
具体在我的帖子里
http://topic.csdn.net/u/20091111/17/8fa87372-b003-4ebb-90fe-db3b20c08311.htmlpackage com;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;import org.apache.commons.fileupload.*;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.Streams;/**
* Servlet implementation class for Servlet: UploadServlet
*
*/
public class UploadServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
    File tmpDir = null;//初始化上传文件的临时存放目录
    File saveDir = null;//初始化上传文件后的保存目录
    String msg="";
    int l=0;
  public UploadServlet() {
    super();
  }       protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    doPost(request,response);
  }     
  
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
             
    try{
        if(ServletFileUpload.isMultipartContent(request)){
             String fileName="";
             
           
          DiskFileItemFactory dff = new DiskFileItemFactory();//创建该对象
          dff.setRepository(tmpDir);//指定上传文件的临时目录
          dff.setSizeThreshold(1024000);//指定在内存中缓存数据大小,单位为byte
          ServletFileUpload sfu = new ServletFileUpload(dff);//创建该对象
          //sfu.setFileSizeMax(5*1024*1024);//指定单个上传文件的最大尺寸
          sfu.setSizeMax(5*1024*1024);//指定一次上传多个文件的总尺寸
          List items=sfu.parseRequest(request);
          Iterator fii = items.iterator();//解析request 请求,并返回FileItemIterator集合
          while(fii.hasNext()){
            FileItem fis = (FileItem)fii.next();//从集合中获得一个FileItem
            if(!fis.isFormField() && fis.getName().length()>0){//过滤掉表单中非文件域
               
               int i=fis.getName().lastIndexOf("\\");
               if(i<0){
                       fileName=fis.getName();//兼容非ie
                   }
                   else{
                       fileName = fis.getName().substring(i);//获得上传文件的文件名
                   }
                System.out.println("取得文件请求"+fis.getFieldName()+"他的名是:"+fis.getName()+"值是"+fis.getString());           
              BufferedInputStream in = new BufferedInputStream(fis.getInputStream());//获得文件输入流
               BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File(saveDir+"\\"+fileName)));//获得文件输出流
                msg=msg+"文件"+fileName+"上传成功\\n";
                Streams.copy(in, out, true);//开始把文件写到你指定的上传文件夹
                in.close();
                out.flush();
                out.close();
            }
            else if(fis.isFormField()){
                System.out.println("取得非文件请求"+fis.getFieldName()+"他的名是:"+fis.getName()+"值是"+fis.getString());
            }
           
            
            
          }
          
           response.setContentType("text/html;charset=UTF-8");
           response.setCharacterEncoding("UTF-8");
           java.io.PrintWriter out=response.getWriter();
         
         out.println("<html>");
         out.println("<body>");
         out.println("<script>window.parent.Finish('"+msg+"');</script>");//终于成功了,还不到你的上传文件中看看,你要的东西都到齐了吗 
         out.println("</body>");
         out.println("</html>");
         msg="";
        }
    }catch(Exception e){
        e.printStackTrace();
    }
  }             public void init() throws ServletException {
    /* 对上传文件夹和临时文件夹进行初始化
    *
    */
    super.init();
      String tmpPath = "C:\\WINDOWS\\temp";
      String savePath = "E:\\Test\\upload";
    tmpDir = new File(tmpPath);
    saveDir = new File(savePath);
    if(!tmpDir.isDirectory())
        tmpDir.mkdir();
    if(!saveDir.isDirectory())
        saveDir.mkdir();    
  }   
}

Answer 2

1楼的是 sfu.setSizeMax(5*1024*1024);//指定一次上传多个文件的总尺寸 
5M~（当然可以任意设置限制）
那种方式我试过，文件太大会内存溢出！
JspSmartUpload组件一般  COS组件效果比较好~