学习SmartUpload组件时，出现文件不能保存的异常

 在学习SmartUpload文件上传组件时遇到如下问题，javax.servlet.ServletException: org.lxh.smart.SmartUploadException: File can't be saved (1120).不知如何解决。。。。

  现将具体情况描述如下，求高手指导...

   上传单个文件，为上传文件自动命名：

 （1）表单：01.html

姓名：

照片:

(2)为上传文件自动命名，格式：IP+时间戳+三位随机数。。编译正常。

 package cn.mldn.lxh.util;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.Random;

public class IPTimeStamp

{ private SimpleDateFormat sdf = null;

private String ip = null;

public IPTimeStamp(){}

public IPTimeStamp(String ip){

this.ip = ip;

}

public String getIPTimeRand(){ //得到IP地址+时间戳+三位随机数

StringBuffer buf = new StringBuffer();

if(this.ip != null)

{ String s[] = this.ip.split("\\.");

for(int i=0;i

{

buf.append(this.addZero(s[i],3));

}

}

buf.append(this.getTimeStamp());

Random r = new Random();

for(int i=0;i<3;i++)

{buf.append(r.nextInt(10));}

return buf.toString();}

private String addZero(String str,int len){

StringBuffer s = new StringBuffer();

s.append(str);

while(s.length()

s.insert(0,"0");

}

return s.toString();

}

public String getDate(){

this.sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");

return this.sdf.format(new Date());

}

public String getTimeStamp(){

this.sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");

return this.sdf.format(new Date());

}

}

（3）smart02.jsp，自动命名。。

<%@ page contentType="text/html" pageEncoding="GBK"%>

<%@ page import="org.lxh.smart.*"%>

<%@ page import="cn.mldn.lxh.util.IPTimeStamp"%>

<%

SmartUpload smart = new SmartUpload();

smart.initialize(pageContext);

smart.upload();

String name = smart.getRequest().getParameter("uname");

IPTimeStamp its = new IPTimeStamp(request.getRemoteAddr());

String ext = smart.getFiles().getFile(0).getFileExt();

String fileName = its.getIPTimeRand() + "." + ext;

smart.getFiles().getFile(0).saveAs(getServletContext().getRealPath("/")+"upload"+java.io.File.separator+fileName);

//提示此处异常。。无法保存文件。。。（根目录下已经建立文件及upload）

%>

姓名：<%=name%>

异常信息如下:

HTTP Status 500 - An exception occurred processing JSP page /smartdemo/smart02.jsp at line 15

---

type Exception report

message An exception occurred processing JSP page /smartdemo/smart02.jsp at line 15

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /smartdemo/smart02.jsp at line 15

12: 	IPTimeStamp its = new IPTimeStamp(request.getRemoteAddr());
13: 	String ext = smart.getFiles().getFile(0).getFileExt();
14: 	String fileName = its.getIPTimeRand() + "." + ext;
15: 	smart.getFiles().getFile(0).saveAs(getServletContext().getRealPath("/")+"upload"+java.io.File.separator+fileName);
16: 	
17: %>
18: 
姓名：<%=name%>


Stacktrace:
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

 

root cause

javax.servlet.ServletException: org.lxh.smart.SmartUploadException: File can't be saved (1120).
	org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:865)
	org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:794)
	org.apache.jsp.smartdemo.smart02_jsp._jspService(smart02_jsp.java:86)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

 

root cause

org.lxh.smart.SmartUploadException: File can't be saved (1120).
	org.lxh.smart.File.saveAs(File.java:75)
	org.lxh.smart.File.saveAs(File.java:54)
	org.apache.jsp.smartdemo.smart02_jsp._jspService(smart02_jsp.java:69)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

 

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.36 logs.