Is there a simple and safe way to convert a PrintWriter into a PrintStream?

问题

Is there a clean and simple way to convert an instance of java.io.PrintWriter into a java.io.PrintStream?

回答1:

First obtain an OutputStream from the Writer. See this question

Then pass it as argument to the PrintStream constructor:

OutputStream os = new WriterOutputStream(writer);
PrintStream ps = new PrintStream(os);

Update: commons-io 2.0 has WriterOutputStream, so use it.

来源：https://stackoverflow.com/questions/4268353/is-there-a-simple-and-safe-way-to-convert-a-printwriter-into-a-printstream