java写入txt PrintWriter FileOutputStream

import java.io.File; import java.io.FileOutputStream; public class TxtWirte { public void DOWriteTxt(String file, String txt) { try { FileOutputStream os = new FileOutputStream(new File(file), true); os.write((txt + "\n").getBytes()); } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) { new TxtWirte().DOWriteTxt("D:\\问好.txt", "你好！"); } }