使用Java和readLine（）回车和换行 [英] Carriage return and new line with Java and readLine()

问题描述

我使用以下代码建立HTTP连接并读取数据：

I am using the following code to establish a HTTP connection and read data:

con = (HttpURLConnection) new URL("http://stream.twitter.com/1/statuses/sample.json").openConnection();
...
con.connect();
while (line = rd.readLine()) {
    if (line.contains("\r\n")) {
      System.out.println("Carriage return + new line");
    }
} 

然而，似乎是\\\ n不是字符串的一部分（行），尽管服务器确实返回它们。如何读取数据并检测\\ n？

However, it seems like "\r\n" is not part of the string (line), although the server does return them. How can I read the data and detect "\r\n"?

谢谢，

Joel

推荐答案

如果 rd 的类型为 BufferedReader 无法判断 readLine（）是否返回以 \ n ， \ r 或 \\\\ n ...行尾字符是丢弃而不是返回字符串的一部分。

If rd is of type BufferedReader there is no way to figure out if readLine() returned something that ended with \n, \r or \r\n... the end-of-line characters are discarded and not part of the returned string.

如果您真的关心这些字符，则无法通过 readLine（）。例如，您必须通过 read（） 。

If you really care about these characters, you can't go through readLine(). You'll have to for instance read the characters one by one through read().

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