JSP文件上传代码

浏览数：27 / 时间：2015年06月09日

一、首先建立一个上传的界面，取名为a.jsp，代码如下

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
<!--
body,td,th {
 font-size: 12px;
}
-->
</style></head>
<body>
                                        
<form action="b.jsp" method="post" enctype="multipart/form-data">
<br>
请选择要上传的文件:<input type="file" name="file" size=50>
<input type="submit" value="提交">
</form>

</body>
</html>

二、上传代码b.jsp内容如下。

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" import="java.io.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
 <%
     try{
      String tempFileName=new String("tempFile1");//接收上传的文件内容的临时文件的文件名  
      File tempFile1=new File("D:\\Program Files\\tomcat\\Tomcat 5.0\\webapps\\neizhiduixiang\\aa",tempFileName);
      FileOutputStream outputFile=new FileOutputStream(tempFile1);
      InputStream fileSource=request.getInputStream();//得到客户端提交的所有数据
      byte b[]=new byte[1000];
      int n;
      while((n=fileSource.read(b))!=-1)
        outputFile.write(b,0,n);//将得到的客户端数据写入临时文件
      outputFile.close();
      fileSource.close();
      
      
      RandomAccessFile randomFile1=new RandomAccessFile(tempFile1,"r");
      randomFile1.readLine();//读取第一行数据
      String FilePath=randomFile1.readLine();//读取第二行数据，这行数据包括了文件的路径和文件名
      int position=FilePath.lastIndexOf(‘\\‘);//等到文件名 
      String filename=FilePath.substring(position+1,FilePath.length()-1);
      filename=new String(filename.getBytes("iso-8859-1"),"utf-8");
      
      randomFile1.readLine();
      randomFile1.readLine();
      long forthEnterPosition= randomFile1.getFilePointer();//找到上传的文件数据的结束位置，即倒数第4行
      
      
      File FileUploadDir=new File("D:\\Program Files\\tomcat\\Tomcat 5.0\\webapps\\neizhiduixiang\\aa","Upload");
      FileUploadDir.mkdir();
      File saveFile1=new File("D:\\Program Files\\tomcat\\Tomcat 5.0\\webapps\\neizhiduixiang\\aa",filename);
      RandomAccessFile randomFile2=new RandomAccessFile(saveFile1,"rw");
      
      long endPosition=randomFile1.length();
      int j=1;
      while((endPosition>=0)&&(j<=4))
         {
       endPosition--;
       randomFile1.seek(endPosition);
       if(randomFile1.readByte()==‘\n‘)
        j++;
         }
      randomFile1.seek(forthEnterPosition);  
      long startPoint=randomFile1.getFilePointer();  
      while(startPoint<endPosition-1)  
        {  
           randomFile2.write(randomFile1.readByte());  
           startPoint=randomFile1.getFilePointer();  
        }  
      
      randomFile1.close();
      randomFile2.close();
      tempFile1.delete();
      out.print("上传成功");
      }
      catch(Exception e)
      {
            out.print("上传失败");
      }
%>

</body>
</html>

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" import="java.io.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
 <%
     try{
      String tempFileName=new String("tempFile1");//接收上传的文件内容的临时文件的文件名  
      File tempFile1=new File("D:\\Program Files\\tomcat\\Tomcat 5.0\\webapps\\neizhiduixiang\\aa",tempFileName);
      FileOutputStream outputFile=new FileOutputStream(tempFile1);
      InputStream fileSource=request.getInputStream();//得到客户端提交的所有数据
      byte b[]=new byte[1000];
      int n;
      while((n=fileSource.read(b))!=-1)
        outputFile.write(b,0,n);//将得到的客户端数据写入临时文件
      outputFile.close();
      fileSource.close();
      
      
      RandomAccessFile randomFile1=new RandomAccessFile(tempFile1,"r");
      randomFile1.readLine();//读取第一行数据
      String FilePath=randomFile1.readLine();//读取第二行数据，这行数据包括了文件的路径和文件名
      int position=FilePath.lastIndexOf(‘\\‘);//等到文件名 
      String filename=FilePath.substring(position+1,FilePath.length()-1);
      filename=new String(filename.getBytes("iso-8859-1"),"utf-8");
      
      randomFile1.readLine();
      randomFile1.readLine();
      long forthEnterPosition= randomFile1.getFilePointer();//找到上传的文件数据的结束位置，即倒数第4行
      
      
      File FileUploadDir=new File("D:\\Program Files\\tomcat\\Tomcat 5.0\\webapps\\neizhiduixiang\\aa","Upload");
      FileUploadDir.mkdir();
      File saveFile1=new File("D:\\Program Files\\tomcat\\Tomcat 5.0\\webapps\\neizhiduixiang\\aa",filename);
      RandomAccessFile randomFile2=new RandomAccessFile(saveFile1,"rw");
      
      long endPosition=randomFile1.length();
      int j=1;
      while((endPosition>=0)&&(j<=4))
         {
       endPosition--;
       randomFile1.seek(endPosition);
       if(randomFile1.readByte()==‘\n‘)
        j++;
         }
      randomFile1.seek(forthEnterPosition);  
      long startPoint=randomFile1.getFilePointer();  
      while(startPoint<endPosition-1)  
        {  
           randomFile2.write(randomFile1.readByte());  
           startPoint=randomFile1.getFilePointer();  
        }  
      
      randomFile1.close();
      randomFile2.close();
      tempFile1.delete();
      out.print("上传成功");
      }
      catch(Exception e)
      {
            out.print("上传失败");
      }
%>

</body>
</html>