path = Application.StartupPath + "timedate.ini";

面试题: 怎么把系统时间写入文件中?

面试遇到这样一个问题
1. 怎么把系统当前时间写入文件中?
按这个格式 yyyy-MM-dd HH:mm:ss

2. 怎么读这个文件把它解析成一个DATE类型

[解决办法]

Java code

import java.io.*;import java.util.*;import java.text.*;public class DateInFile{    public static void main(String[] args){        File file = new File("D:/train/csdn/date.txt");        try{        BufferedWriter bw = new BufferedWriter(new FileWriter("D:\\train\\csdn\\date.txt"));                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        Date d = new Date();        String msg = sdf.format(d);        bw.write(msg);        bw.flush();System.out.println(msg+"已写入文件！");        bw.close();        BufferedReader buf = new BufferedReader(new FileReader("D:\\train\\csdn\\date.txt"));        String s = buf.readLine();        Date dd = sdf.parse(s);System.out.println(dd+"已从文件取出！");        buf.close();        }        catch(Exception e){            e.printStackTrace();        }    }}
[解决办法]
只是把当前日期取出，然后格式化成特定形式的字符串，
然后就是IO操作。
[解决办法]
楼上朋友回答的不错，楼主参考一下
[解决办法]
mark
[解决办法]
探讨

Java codeimport java.io.*;
import java.util.*;
import java.text.*;
public class DateInFile{
    public static void main(String[] args){
        File file = new File("D:/train/csdn/date.txt");
        try{
        BufferedWriter bw = new BufferedWriter(new FileWriter("D:\\train\\csdn\\date.txt"));        
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
       …

[解决办法]
2楼 答案不错 就是IO的操作 以及 date的 format
[解决办法]
2楼正解阿。。。很详细
[解决办法]
探讨

Java codeimport java.io.*;
import java.util.*;
import java.text.*;
public class DateInFile{
    public static void main(String[] args){
        File file = new File("D:/train/csdn/date.txt");
        try{
        BufferedWriter bw = new BufferedWriter(new FileWriter("D:\\train\\csdn\\date.txt"));        
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
       …

[解决办法]
1楼的好像不对吧，parse方法怎么返回是String类型呢
[解决办法]
可以参考一下2楼的
[解决办法]
C#代码，
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace ConvertUnicodeToByte
{
   class IniFile
   {  
       static void Main(string[] args)
       {
           string riqi = "";
           string path = "";
           riqi = System.DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss ");
           //path = Application.StartupPath + "timedate.ini";
           path = @"C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ConvertUnicodeToByte\ConvertUnicodeToByte\bin\Debug\timedate.ini"; 
 
           WriteIniData("Now", "datetime", riqi, path);
           Console.WriteLine();
           Console.WriteLine(ReadIniData("Now", "datetime", "", path));
           Console.ReadLine();
       }

       [DllImport("kernel32")]//返回0表示失败，非0为成功
       private static extern long WritePrivateProfileString(string section, string key,
           string val, string filePath);

       [DllImport("kernel32")]//返回取得字符串缓冲区的长度
       private static extern long GetPrivateProfileString(string section, string key,
           string def, StringBuilder retVal, int size, string filePath);

       // 写入＊．ini文件
       public static bool WriteIniData(string Section, string Key, string Value, string iniFilePath)
       {
           if (File.Exists(iniFilePath))
           {
               long OpStation = WritePrivateProfileString(Section, Key, Value, iniFilePath);
               if (OpStation == 0)
               {
                   return false;
               }
               else
               {
                   return true;
               }
           }
           else
           {
               return false;
           }
       }

       // 读取*.ini文件中的相应节下面的键值
       public static string ReadIniData(string Section, string Key, string NoText, string iniFilePath)
       {
           if (File.Exists(iniFilePath))
           {
               StringBuilder temp = new StringBuilder(1024);
               GetPrivateProfileString(Section, Key, NoText, temp, 1024, iniFilePath);
               return temp.ToString();
           }
           else
           {
               return String.Empty;
           }
       }

   }
}