简单文件上传

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用smartupload上传文件.rar (73.1 KB)
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用于生成验证码 | 请问，谁有WebWork视频，请贡献一下，谢了 ...

2008-02-29 16:25
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1 楼 lookingfor 2008-03-27

本人自己用java写的一个文件上传组件，欢迎大家使用和交流。

下面是如何使用代码：

//--------------uploadFile.html------------------

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>upload file </title>
</head>
<body>

<form method="post" encType="multipart/form-data" action="servlet/UploadFile">
<table>
    <tr><td>你的姓名是：</td><td><input type="text" name="name" /></td></tr>
    <tr><td>你的学号是：</td><td><input type="text" name="number" /></td></tr>
    <tr><td>你的兴趣是：</td><td><input type="checkbox" name="interest" value="reading"/>reading
                               <input type="checkbox" name="interest" value="skating"/>skating
                               <input type="checkbox" name="interest" value="go shopping"/>go shopping</td></tr>
    <tr><td>你要上传的文件是：</td><td><input type="file" name="file1" /></td></tr>
    <tr><td>你要上传的文件是：</td><td><input type="file" name="file1" /></td></tr>
    <tr><td><input type="submit" value="submit" /></td></tr>
</table>
</form>

</body>
</html>

//------------------UploadFile.java  (servlet)------------------------

package servlet;

import org.sklse.upload.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class UploadFile extends HttpServlet {

 /**
  * Constructor of the object.
  */
 public UploadFile() {
    super();
 }

 /**
  * Destruction of the servlet. <br>
  */
 public void destroy() {
     super.destroy(); // Just puts "destroy" string in log
  // Put your code here
 }

 /**
  * The doGet method of the servlet. <br>
  *
  * This method is called when a form has its tag value method equals to get.
  * 
  * @param request the request send by the client to the server
  * @param response the response send by the server to the client
  * @throws ServletException if an error occurred
  * @throws IOException if an error occurred
  */
 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {

  response.setContentType("text/html");
  PrintWriter out = response.getWriter();
  out
    .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
  out.println("<HTML>");
  out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
  out.println("  <BODY>");
  out.print("    This is ");
  out.print(this.getClass());
  out.println(", using the GET method");
  out.println("  </BODY>");
  out.println("</HTML>");
  out.flush();
  out.close();
 }

 /**
  * The doPost method of the servlet. <br>
  *
  * This method is called when a form has its tag value method equals to post.
  * 
  * @param request the request send by the client to the server
  * @param response the response send by the server to the client
  * @throws ServletException if an error occurred
  * @throws IOException if an error occurred
  */
 public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {

  response.setContentType("text/html");
  response.setCharacterEncoding("UTF-8");
  PrintWriter out = response.getWriter();
  out
    .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
  out.println("<HTML>");
  out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
  out.println("  <BODY>");
  
  // ---------------------deal with the upload file -------------------------------
  try
  {
   MultipartRequest parameters=new MultipartRequest(request,"UTF-8");
   // deal with name/value
   Enumeration textNames=parameters.getParameterNames();
   out.println("<table>");
   String value;
   String[] values;
   while(textNames.hasMoreElements())
   {
       String name=(String)textNames.nextElement();
       Object object=parameters.getParameter(name);
       if(object instanceof String)
       {
           value=(String)object;
           out.println("<tr><td>"+name+"=</td><td>"+value+"</td></tr>");
       }
        else if(object==null)
       {
          object=parameters.getParameterValues(name);
          values=(String[])object;
          out.println("<tr><td>"+name+"=</td><td>");
          for(int i=0;i<values.length;i++)
          out.println(values[i]+" ");
          out.println("</td></tr>");
       }
    
   }
   out.println("</table>");
   
   //deal with name/file
   FileHolder[] fileHolders=parameters.getFileParameterValues("file1");
   for(int i=0;i<fileHolders.length;i++)
   {
       out.println("<br><hr width='50%' align='left'>");
       FileHolder fileHolder=fileHolders[i];
       if(!fileHolder.getFileName().equals(""))
           fileHolder.saveTo("/pictures/");
       out.println("fileName="+fileHolder.getFileName()+"<br>");
       //out.println("fileParameterName="+fileHolder.getParameterName()+"<br>");
       out.println("clientFilePath="+fileHolder.getClientFilePath()+"<br>");
       out.println("contentType="+fileHolder.getContentType()+"<br>");
   }
   
  }
  catch(MultipartRequestException cfe)
  {
   out.println(cfe.getMessage());
  }
  
  out.println("  </BODY>");
  out.println("</HTML>");
  out.flush();
  out.close();
 }

 /**
  * Initialization of the servlet. <br>
  *
  * @throws ServletException if an error occure
  */
 public void init() throws ServletException {
  // Put your code here
 }

}
//----------------------------------------------------
组件实现原理及源代码详单见（http://adorechen.blog.163.com）
//-----------------------------------------------------

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