自己写的简易版Java日志类分享

2019-12-23 15:21junjie JAVA教程

这篇文章主要介绍了自己写的简易版Java日志类分享,本文直接给出实现代码,需要的朋友可以参考下

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									/**

									 * 

									 */

									import java.io.File;

									import java.io.FileWriter;

									import java.io.IOException;

									import java.text.SimpleDateFormat;

									import java.util.Date;

									/**

									 * @author magic282

									 *

									 */

									public class Logger {

									  private static String logFilePath;

									  private static boolean isInitialized = false;

									  private static FileWriter logWriter = null;

									  private static boolean printLogWhenLog = true;

									  private static boolean InitLogger() {

									    String logDirectoryPath = System.getProperty("user.dir")

									        + java.io.File.separatorChar + "log";

									    if (!new File(logDirectoryPath).exists()) {

									      new File(logDirectoryPath).mkdir();

									    }

									    Date logfileDate = new Date();

									    SimpleDateFormat dateFormat = new SimpleDateFormat(

									        "yyyy-MM-dd-HH-mm-ss");

									    logFilePath = logDirectoryPath + java.io.File.separatorChar

									        + dateFormat.format(logfileDate) + ".log";

									    try {

									      logWriter = new FileWriter(logFilePath, true);

									      isInitialized = true;

									    } catch (IOException e) {

									      // TODO Auto-generated catch block

									      System.err.println("Unable to create log file.");

									      System.err.println("Initilization fail.");

									      e.printStackTrace();

									      return false;

									    }

									    return true;

									  }

									  public static void Log(String message) {

									    if (!isInitialized) {

									      InitLogger();

									    }

									    Date logfileDate = new Date();

									    SimpleDateFormat dateFormat = new SimpleDateFormat(

									        "yyyy-MM-dd-HH-mm-ss");

									    String callingClassName = new Exception().getStackTrace()[1]

									        .getClassName();

									    synchronized (logWriter) {

									      String log = String.format("[%s] @ [%s]: %s\n", callingClassName,

									          dateFormat.format(logfileDate), message);

									      if (printLogWhenLog) {

									        System.out.printf("[log]:%s", log);

									      }

									      try {

									        logWriter.write(log);

									        logWriter.flush();

									      } catch (IOException e) {

									        // TODO Auto-generated catch block

									        System.err.println("Write log to file %s error.");

									        e.printStackTrace();

									      }

									    }

									  }

									  public static void Log(Exception exception) {

									    if (!isInitialized) {

									      InitLogger();

									    }

									    Date logfileDate = new Date();

									    SimpleDateFormat dateFormat = new SimpleDateFormat(

									        "yyyy-MM-dd-HH-mm-ss");

									    String callingClassName = new Exception().getStackTrace()[1]

									        .getClassName();

									    synchronized (logWriter) {

									      String log = String.format("[%s] @ [%s]: %s\n", callingClassName,

									          dateFormat.format(logfileDate), exception.toString());

									      if (printLogWhenLog) {

									        System.out.printf("[log]:%s", log);

									      }

									      try {

									        logWriter.write(log);

									        logWriter.flush();

									      } catch (IOException e) {

									        // TODO Auto-generated catch block

									        System.err.println("Write log to file %s error.");

									        e.printStackTrace();

									      }

									    }    

									  }

									}