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URL url = new URL(
"https://ibsbjstar.ccb.com.cn/app/ccbMain?MERCHANTID=105440173990021&BRANCHID=441000000&POSID=100000802&ORDERDATE=20091211&ORDERID=002939&TXCO");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
int contentLength = connection.getContentLength();
System.out.println(contentLength);