urlconnection 获取网页返回的xml不全???

使用urlconnection 访问网页。获取返回的xml字符串不全，到了一定长度(比较长)之后就变成“...”了，返回小长度字符串没问题
BufferedReader inss = new BufferedReader(new InputStreamReader(
httpurlconnection.getInputStream()));
String line = null;
StringBuffer content = new StringBuffer();
while ((line = inss.readLine()) != null) {
content.append(line);
}
inss.close();
inss = null;
url = null;
rev = content.toString();