（java入门） MyLog

最新推荐文章于 2021-03-21 06:06:40 发布

最新推荐文章于 2021-03-21 06:06:40 发布 · 331 阅读

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#Java #C #C++ #C# #.net

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本文介绍了一个简单的日志记录工具实现，分别用Java和C#两种语言进行编码。该工具能够记录时间戳及自定义消息，并将这些信息写入到指定的日志文件中，便于后续的应用程序维护和调试。

package net.dncsoft.test;

import java.io.FileWriter;
import java.io.PrintWriter;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class MyLog {

	private static final String logFileName_ = "C:\\tianyu.log";
	private static long lastTimestamp = 0L;
	private static long firstTimestamp = 0L;

	public static synchronized void start() {
		lastTimestamp = new Date().getTime();
		firstTimestamp = lastTimestamp;
		
		try {
			FileWriter writer = new FileWriter(logFileName_, true);
			PrintWriter out = new PrintWriter(writer);

			out.println("-----------------------------------------------------");

			out.close();
			writer.close();
		} catch (Exception localException) {
			localException.printStackTrace();
		}
		
	}

	public static synchronized void log(String p_msg) {
		try {
			long nowTimestamp = new Date().getTime();
			
			FileWriter writer = new FileWriter(logFileName_, true);
			PrintWriter out = new PrintWriter(writer);

			Calendar cal = Calendar.getInstance();
			SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd-hh:mm:ss-SSS");
			DecimalFormat decimalFormat = new DecimalFormat("####");
			
			out.print(dateFormat.format(cal.getTime()) + "\t");
			out.print(decimalFormat.format(nowTimestamp - lastTimestamp) + "\t");
			out.print(decimalFormat.format(nowTimestamp - firstTimestamp) + "\t");
			out.println(p_msg);
			out.close();
			writer.close();

			lastTimestamp = nowTimestamp;
		} catch (Exception localException) {
			localException.printStackTrace();
		}
	}
}

C#版

private readonly object syncLock = new object();
void MyLog(string msg, [System.Runtime.CompilerServices.CallerFilePath] string filePath = "", [System.Runtime.CompilerServices.CallerLineNumber] int lineNumber = 0)
{
	lock (syncLock)
	{
		System.IO.FileStream LogFile = new System.IO.FileStream(@"C:\temp\tian.log.txt ", System.IO.FileMode.Append);
		System.IO.StreamWriter LogStream = new System.IO.StreamWriter(LogFile);
		LogStream.WriteLine(DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss-") + lineNumber + ":" + msg);
		LogStream.Close();
		LogFile.Close();
	}
}