log.java

JAVA编写的一个数据解包分发程序!希望能给初学JAVA的朋友一点朋友!

package md_accept;

import java.io.*;
import java.util.*;

class Log {

  Log() {
  }

  public  void addLog(String path,String logFileName ,String date,String info)
  {
    try {
      File dir = new File(path);
      if(!dir.exists())
        dir.mkdir();

      FileWriter out=new FileWriter(path+"\\"+logFileName,true);
      String tempString="[ "+date+" ]  "+info+"\n";
      char[] buffer=tempString.toCharArray() ;
      out.write(buffer);
      out.close();
    }
    catch (Exception e) {
      System.out.println("[ "+date+" ]  "+"写日志文件出错:"+e.getMessage());
    }
  }

  /**
   * 获得年、月
   * @return
   */
  public String getYYYYMMDD(){
    Calendar date = new GregorianCalendar();
    int month = date.get(Calendar.MONTH)+1;
    String month_str;
    if (month<10)
      month_str = "0"+(String.valueOf(month)).toString().trim();
    else
      month_str = (String.valueOf(month)).toString().trim();
    int day=date.get(Calendar.DATE);
    String day_str;
    if (day<10)
      day_str="0"+(String.valueOf(day)).toString().trim();
    else
      day_str=(String.valueOf(day)).toString().trim();
    int year=date.get(Calendar.YEAR);
    String year_str;
    year_str=(String.valueOf(year)).toString().trim();
    return year_str+month_str+day_str;
  }

  /**
   * 获得年、月
   * @return
   */
  public String getYYYYMM(){
    Calendar date=new GregorianCalendar();
    int month=date.get(Calendar.MONTH)+1;
    String month_str;
    if (month<10)
      month_str="0"+(String.valueOf(month)).toString().trim();
    else
      month_str=(String.valueOf(month)).toString().trim();
    int day=date.get(Calendar.DATE);
    String day_str;
    if (day<10)
      day_str="0"+(String.valueOf(day)).toString().trim();
    else
      day_str=(String.valueOf(day)).toString().trim();
    int year=date.get(Calendar.YEAR);
    String year_str;
    year_str=(String.valueOf(year)).toString().trim();
    return year_str+month_str;
  }

  /**
   * 获得年、月、日、时间
   * @return
   */
  public String getDateTime(){

    Calendar date = new GregorianCalendar();

    int year=date.get(Calendar.YEAR);
    String year_str;
    year_str=(String.valueOf(year)).toString().trim();

    int month = date.get(Calendar.MONTH)+1;
    String month_str;
    if (month<10)
      month_str = "0"+(String.valueOf(month)).toString().trim();
    else
      month_str = (String.valueOf(month)).toString().trim();

    int day=date.get(Calendar.DATE);
    String day_str;
    if (day<10)
      day_str="0"+(String.valueOf(day)).toString().trim();
    else
      day_str=(String.valueOf(day)).toString().trim();

    Date nowDate = new Date();
    String temp = (new Date()).toString();
    String hour_str = temp.substring(11,13);
    /*if(hour<10)
      hour_str ="0"+(String.valueOf(hour)).toString().trim();
    else
      hour_str = (String.valueOf(hour)).toString().trim();*/

    int minute = date.get(Calendar.MINUTE);
    String minute_str;
    if(minute<10){
      minute_str = "0"+(String.valueOf(minute)).toString().trim();
    }
    else
      minute_str = (String.valueOf(minute)).toString().trim();

    int second = date.get(Calendar.SECOND);
    String second_str;
    if(second<10)
      second_str = "0"+(String.valueOf(second)).toString().trim();
    else
      second_str = (String.valueOf(second)).toString().trim();

    return year_str+month_str+day_str+hour_str+minute_str+second_str;
  }
}