java写文件(不覆盖原内容)

String destStr = new String();
			destStr = date.getDate() + str + "\n";

			java.io.FileWriter fw = new java.io.FileWriter("C:\\Log.txt", true);
			java.io.PrintWriter pw = new java.io.PrintWriter(fw);
			pw.println(destStr);
			pw.close();
			fw.close();