public static void main(String[] args) throws IOException {
        BufferedWriter pw=null;
        try{
            pw=new BufferedWriter(new FileWriter("C:\\1.log",true));
            StringBuffer hisStr = new StringBuffer();
            hisStr.append("192.168.1.39|");
            hisStr.append(null+"|");
            hisStr.append("1001|");
            hisStr.append("3|");
            hisStr.append("444|");
            hisStr.append(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
            hisStr.append("\r\n");
            pw.write(hisStr.toString());
        }catch(Exception e){
            System.out.println(e);
        }finally{
            pw.flush();
            pw.close();
        }
    }