Java output console error message to file?

问题

I have a simple piece of code that outputs console text to a text file in Java:

PrintStream out = new PrintStream(new FileOutputStream("test2_output.txt"));
System.setOut(out);

However I require this text file to contain the error messages that is produced in the console but they are not included.

How do I do this?

回答1:

Add:

System.setErr(out);

at the end.

回答2:

There is also a System.setErr() call to redirect stderr.

回答3:

System.setErr(out)

回答4:

You're currently redirecting the standard output stream to a file. To redirect the standard error stream use

System.setErr(out);

• System.setErr()javadoc

回答5:

Try:

PrintStream pst = new PrintStream("Text.txt");  
System.setOut(pst);
System.setErr(pst);
System.out.println("Hello, Finally I've printed output to file..");

来源：https://stackoverflow.com/questions/9270410/java-output-console-error-message-to-file