关于httpUrlConnection的getOutputStream（）异常

[qq_34634962]

String url = " http://10.0.0.31:6070/service/XChangeServlet?account=anxin&groupcode=anxin";
URL reslUrl = new URL(url);
HttpURLConnection connection = (HttpURLConnection) reslUrl.openConnection();
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
connection.setRequestProperty("Content-type", "text/xml");
connection.setRequestMethod("POST");
connection.connect();
// 打印状态码
System.out.println(connection.getResponseCode());
File file = new File(strFilePath);
这里就出错了
BufferedOutputStream out = new BufferedOutputStream(connection.getOutputStream());
BufferedInputStream input = new BufferedInputStream(new FileInputStream(file));
int length;
byte[] buffer = new byte[1000];
while ((length = input.read(buffer, 0, 1000)) != -1) {
out.write(buffer, 0, length);
}
input.close();
out.close();



java.net.ProtocolException: Cannot write output after reading input.
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1087)
at com.isoftstone.iis.quartz.VoucherSendQuartzJob.getVoucherXml(VoucherSendQuartzJob.java:66)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:273)
at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:264)
at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:529)

[qq_34634962]

求解决啊BufferedOutputStream out = new BufferedOutputStream(connection.getOutputStream());这行一直报异常啊

[qq_34634962]

有人吗，急求啊

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