使用java实现日志工具类分享__String_month_fileWriter_today_valueOf_

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使用java实现日志工具类分享

来源: 互联网发布时间：2014-11-04

本文导语: 代码如下:package com.teligen.eos.teleCode; import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.util.Date; /** * 书写日志信息到指定的文件中 */public class WriteLogUtil { private static String rootPath = "D:\logs\"; /** * 将信息写到文...

代码如下:

package com.teligen.eos.teleCode;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Date;

/**
* 书写日志信息到指定的文件中
*/
public class WriteLogUtil {

private static String rootPath = "D:\logs\";

/**
* 将信息写到文件中
* @param msg
*/
public static void writeMsgToFile(String msg) {
  //删除之前的文件
  delOldFile();

  FileWriter fileWriter = null;
  try {
   fileWriter = new FileWriter(getFileName(),true);
   Date today = new Date();
   String time = String.valueOf(today.getHours()) + ":" + String.valueOf(today.getMinutes()) + " " + String.valueOf(today.getSeconds());
   fileWriter.write("#" + time + "# [" + msg + "]" + "rn");
   fileWriter.flush();
  } catch (IOException e) {
   System.out.println("### 写日志到文件异常 ### >>> " + e.getMessage());
   e.printStackTrace();
  } finally {
   try {
    fileWriter.close();
   } catch (IOException e) {
    System.out.println("### 关闭写日志的流异常 ### >>> " + e.getMessage());
    e.printStackTrace();
   }
  }
}

/**
* 删除之前的日志文件
*/
private static void delOldFile() {
  Date today = new Date();
  int month = today.getMonth()+1;
  month = month - 2;
  if(month == -1) month = 11;
  if(month == 0) month = 12;
  String delPath = rootPath + String.valueOf(month) + "\";
  File folder = new File(delPath);
  if(folder.exists()) {
   File[] files = folder.listFiles();
   for(int i=0; i