如何更快地读取BufferedReader | 如何更快地读取BufferedReader

本文介绍了如何更快地读取BufferedReader的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我要优化此代码:

InputStream is = rp.getEntity().getContent();

BufferedReader reader = new BufferedReader(new InputStreamReader(is));

String text = "";
String aux = "";

while ((aux = reader.readLine()) != null) {
        text += aux;
      }

问题是，我不知道如何读取bufferedReader的内容，并将其复制到String中的速度比上面的速度还要快.我需要花尽可能少的时间.谢谢

The thing is that i don't know how to read the content of the bufferedreader and copy it in a String faster than what I have above.I need to spend as little time as possible.Thank you

推荐答案

在循环中使用字符串连接是的经典性能杀手(因为字符串是不可变的，因此，将复制越来越大的整个字符串用于每个串联).改为执行此操作:

Using string concatenation in a loop is the classic performance killer (because Strings are immutable, the entire, increasingly large String is copied for each concatenation). Do this instead:

StringBuilder builder = new StringBuilder();
String aux = "";

while ((aux = reader.readLine()) != null) {
    builder.append(aux);
}

String text = builder.toString();

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