package FileUpload;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import javax.servlet.ServletInputStream;
/**
 * 
 */
/**
 * @author Qch
 * 
 */
public class FileUpload
{
  ServletInputStream in=null;
  String fpath="C://";
  public FileUpload()
  {
    fpath="C://";
    in=null;
  }
  public void setInputStream(ServletInputStream in)
  {
    this.in=in;
  }
  public void setFpath(String p)
  {
    this.fpath=p;
  }
  public String getFpath()
  {
    return fpath;
  }
  public String getParameter()
  { 
    String r=null;
    try
    {
      r=getParameter(in);
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    return r;
  }
  public long getFileUpload()
  {
    long r=-1;
    try
    {
      r=getFileUpload(in,fpath);
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    return r;
  }
  public String getParameter(ServletInputStream in)// 只能按顺序提取
      throws Exception
  {
    int l = 0;
    byte[] b = new byte[1024];
    l = in.readLine(b, 0, b.length);// 依次是读取属性的开始符、名称、属性值的类型、属性的值
    String si = new String(b);
    if (si.startsWith("----------------------------"))
    {// 表示是从开始符开始读，否则应为刚读取文件后的一个属性，此时应少读一次
      l = in.readLine(b, 0, b.length);
    }
    l = in.readLine(b, 0, b.length);
    l = in.readLine(b, 0, b.length);
    String value = new String(b, 0, l);
    return value;
  }
  public long getFileUpload(ServletInputStream in, String fpath)// 需要提供输入流和存储路径
      throws Exception
  {
    // out.println("文件信息:br>");
    long begin = System.currentTimeMillis();// 传送时间计时开始
    int l = 0;
    byte[] b = new byte[1024];
    l = in.readLine(b, 0, b.length);
    String sign = new String(b, 0, l);// eg.-----------------------------7d9dd29630a34
    l = in.readLine(b, 0, b.length);
    String info = new String(b, 0, l);// eg.Content-Disposition:form-data;
    // name="file";
    l = in.readLine(b, 0, b.length);
    // String type=new
    // String(b,0,l);//eg.Content-Type:application/octet-stream(程序文件)
    l = in.readLine(b, 0, b.length);
    // String nulll=new String(b,0,l);//此值应为空
    int nIndex = info.toLowerCase().indexOf("filename=\"");
    int nLastIndex = info.toLowerCase().indexOf("\"", nIndex + 10);
    String filepath = info.substring(nIndex + 10, nLastIndex);
    int na = filepath.lastIndexOf("\\");
    String filename = filepath.substring(na + 1);
    // out.println("文件绝对路径："+filepath+"br>");
    // out.println("文件名："+filename+"br>br>");
    String path=fpath + filename;
    File fi = new File(path);// 建立目标文件
    if (!fi.exists()!fi.createNewFile())
      return -2;
    BufferedOutputStream f = new BufferedOutputStream(new FileOutputStream(
        fi));
    while ((l = in.readLine(b, 0, b.length)) > 0)
    {
      if (l == sign.length())
      {
        String sign1 = new String(b, 0, sign.length());
        // out.println(sign1+"br>");
        if (sign1.startsWith(sign))// 比对是否文件已传完
          break;
      }
      f.write(b, 0, l);
      f.flush();
    }
    f.flush();
    f.close();
    long end = System.currentTimeMillis();// 传送时间计时结束
    // out.println("上传文件用时："+(end-begin)+"毫秒br>");
    return end - begin;
  }
}

%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
%
  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 'submitFile.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">
  -->
    script language="javascript">
      function check()
      {
        if (document.form2.name.value==""){
          alert("姓名不能为空！！");
          document.form2.name.focus();
          return false;
        }
        if (document.form2.file.value==""){
          alert("文件不能为空！！");
          return false;
        }
        return true;
      }
    /script>
  /head>
  body>
    br>
    form method="post" name="form2" enctype="MULTIPART/FORM-DATA"
      action="AnswerFile.jsp">
      br>
      p align="center">
        nbsp;
        br>
      /p>
      table width="530" border="1" bgcolor="#c0c0c0" align="center"
        height="91">
        tbody>
          tr>
            td valign="top" align="right">
              姓名
              br>
            /td>
            td valign="top">
              input type="text" name="name">
            /td>
          /tr>
          tr>
            td align="right">
              nbsp; 文件
            /td>
            td align="left">
              nbsp;
              input type="file" name="file">
            /td>
          /tr>
          tr>
            td valign="top" align="right">
              文件类型
              br>
            /td>
            td valign="top" align="left">
              select size="1" name="leixing">
                option selected value="作业">
                  作业
                /option>
                option value="课程设计">
                  课程设计
                /option>
                option value="论文">
                  论文
                /option>
              /select>
            /td>
          /tr>
          tr>
            td align="right">
              input type="Submit" value="上传" name="button2" onclick="return(check());">
            /td>
            td align="left">
              nbsp;
              input type="reset" value="重置" name="button3">
            /td>
          /tr>
        /tbody>
      /table>
      p>
        nbsp;
        br>
        br>
        nbsp;
      /p>
    /form>
  /body>
/html>

%@ page language="java" import="java.util.*,java.io.*"
  pageEncoding="GB18030"%>
%
  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 'AnswerFile.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>
    jsp:useBean id="upload" scope="session" class="FileUpload.FileUpload"/>
    jsp:setProperty name="upload" value="C://" property="fpath"/>
    %
      ServletInputStream in = request.getInputStream();
      upload.setInputStream(in);
      String nam = upload.getParameter();
      out.println("姓名:" + nam + "br>br>");
      long time = upload.getFileUpload();
      out.println("文件上传完毕，总共耗时：" + time + "毫秒br>");
      String leixing = upload.getParameter();
      out.println("文件类型：" + leixing + "br>");
      in.close();
    %>
    br>
    div align="right">
      a href="index.jsp">回到首页/a>
    /div>
  /body>
/html>