请尝试以下操作：
String string = "aaa";InputStream stringStream = new java.io.ByteArrayInputStream(string.getBytes())
stringStream是将从输入字符串中读取字符的流。
OutputStream outputStream = new java.io.ByteArrayOutputStream();PrintStream printStream = new PrintStream(outputStream);// .. writes to printWriter and flush() at the end.String result = outputStream.toString()
printStream是
PrintStream将写入的，而
outputStream后者又将能够返回字符串。
