用Java将字符串写入OutputStream的最佳方法

Question

I have an OutputStream instance which return from HttpURLConnection . I need to write a UTF-8 String into the stream.

I have 2 ways:

1. Use OutputStream itself

    // write String os.write("some utf8 text".getBytes(Charsets.UTF_8)); 

2. Use OutputStreamWriter wrapper

    // BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os, CharsetUtils.UTF_8)); OutputStreamWriter osw = new OutputStreamWriter(os, CharsetUtils.UTF_8); osw.write("some utf8 text"); 

Question : Why should we use OutputStreamWriter over OutputStream to write String?

Thanks!

Answer 1

Question: Why should we use OutputStreamWriter over OutputStream to write String?

Simply to define the encoding only once in the constructor of OutputStreamWriter instead of specifying each time we want to encode a String into UTF-8 thanks to getBytes(Charsets.UTF_8)

Moreover an OutputStreamWriter provides many convenient methods to write String such as write(String) , write(String, int, int) , append(CharSequence) and append(CharSequence, int, int) that you don't have in an OutputStream .