Java中下载文件错误

[小小鸟]

采用Servlet下载文件时，我本机运行正常，能够下载，但在别人电脑上测试时，文件过大下载时后台出错，错误信息如下：

org.mortbay.jetty.EofException
at org.mortbay.jetty.HttpGenerator.flush(HttpGenerator.java:760)
at org.mortbay.jetty.AbstractGenerator$Output.blockForOutput(AbstractGenerator.java:548)
at org.mortbay.jetty.AbstractGenerator$Output.flush(AbstractGenerator.java:569)
at org.mortbay.jetty.HttpConnection$Output.flush(HttpConnection.java:910)
at org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:646)
at org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:577)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109)
at com.eintech.projectDeclare.web.DownloadProjectPackageServlet.doGet(DownloadProjectPackageServlet.java:61)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.eclipse.equinox.http.servlet.internal.ServletRegistration.handleRequest(ServletRegistration.java:90)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:111)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:59)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet.service(HttpServerManager.java:255)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:828)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:450)
Caused by: java.io.IOException: 您的主机中的软件放弃了一个已建立的连接。
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:33)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:104)
at sun.nio.ch.IOUtil.write(IOUtil.java:60)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334)
at org.mortbay.io.nio.ChannelEndPoint.flush(ChannelEndPoint.java:166)
at org.mortbay.io.nio.SelectChannelEndPoint.flush(SelectChannelEndPoint.java:207)
at org.mortbay.jetty.HttpGenerator.flush(HttpGenerator.java:693)
... 28 more



下载程序源码如下：

protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String filePath = req.getParameter("filePath");
if(filePath==null){
resp.getWriter().write("{success:false,errorMessage:'文件路径为空!'}");
return;
}

resp.reset();

InputStream is = null;
OutputStream os = null;
try{
String fileName = filePath.substring(filePath.lastIndexOf("/")+1);
resp.setContentType("APPLICATION/OCTET-STREAM;charset=utf8");
resp.setHeader("Content-disposition", "attachment;filename="
+ new String(fileName.getBytes("gbk"), "iso8859-1") + "");

is = new BufferedInputStream(new FileInputStream(filePath));
os = new BufferedOutputStream(resp.getOutputStream());
int len = 0;
byte [] buf = new byte[2048];
while((len=is.read(buf))>0){
os.write(buf, 0, len);
}
os.flush();
}catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(is!=null){
is.close();
}
if(os!=null){
os.close();
}
}catch (IOException e) {
e.printStackTrace();
}
}
}