我有一个简单的功能,用于连接服务器并将响应作为字符串返回。当返回的数据大小很小但响应很大时,它工作正常。它不完全存储服务器返回的响应字符串,并以...结束字符串。 令人惊讶的是,system.out.println返回正确的响应。请帮帮我。我真的被卡住了。
protected String getResponseFromServer(String URLaddress) {
HttpURLConnection connection = null;
URL serverAddress = null;
BufferedReader rd = null;
StringBuffer sb = new StringBuffer();
try {
serverAddress = new URL(URLaddress);
// set up out communications stuff
connection = null;
connection = (HttpURLConnection) serverAddress.openConnection();
connection.setReadTimeout(20000);
connection.connect();
// read the result from the server
rd = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
System.out.print(line.trim());
sb.append(line.trim());
}
} catch (Exception e) {
e.printStackTrace();
} finally {
// close the connection, set all objects to null
connection.disconnect();
connection = null;
}
return sb.toString();
}
答案 0 :(得分:2)
(编辑:此答案基于OP最初发布的代码。此后OP已编辑该问题以更改有问题的代码。)
这里有一个错误:
sb.append(line.trim(), 0, line.length());
如果line
有任何前导或尾随空格,line.length()
将大于line.trim().length()
。在这种情况下sb.append()
would throw IndexOutOfBoundsException
:
IndexOutOfBoundsException
- 如果start
或end
为否定,或start
大于end
或end
大于s.length()
强>
答案 1 :(得分:0)
您在调试时是否收到了截断的字符串(以...结尾)?试试System.out.println(sb.toString());在你回来之前。