java stringbuilder转string,将Java StringBuilder转储到文件

最新推荐文章于 2025-09-16 15:42:48 发布

转载最新推荐文章于 2025-09-16 15:42:48 发布 · 364 阅读

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#java stringbuilder转string

博客探讨了将StringBuilder内容写入文本文件的高效优雅方式。提出可使用outputStream.write(stringBuilder.toString().getBytes())，但对长文件效率存疑。解决方案建议用Writer和BufferedWriter，直接writer.append(stringBuilder)，还指出其他方案存在不支持指定字符集和需调用toString方法的问题。

What is the most efficient/elegant way to dump a StringBuilder to a text file?

You can do:

outputStream.write(stringBuilder.toString().getBytes());

But is this efficient for a very long file?

Is there a better way?

解决方案

As pointed out by others, use a Writer, and use a BufferedWriter, but then don't call writer.write(stringBuilder.toString()); instead just writer.append(stringBuilder);.

EDIT: But, I see that you accepted a different answer because it was a one-liner. But that solution has two problems:

it doesn't accept a java.nio.Charset. BAD. You should always specify a Charset explicitly.

it's still making you suffer a stringBuilder.toString(). If the simplicity is really what you're after, try the following from the Guava project: