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自己做一个简单的日志工具

摘要: 自己做一个简单的日志工具

package com.ginger.framework.log;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;

import com.ginger.framework.properties.Properties;

/**
 * 

 * Title: 日志处理类，这是一个不使用LOG4J的轻量级的处理方法
 * 

 * 

 * Description: 日志处理
 * 

 * 

 * Copyright: Copyright (c) 2005
 * 

 * 

 * Company: GingerSoftware
 * 

 *
 * @author ginger547
 * @version 1.0
 */
public final class Logger {
  // 全局判断是不是要输出
  private static boolean isLog = true;

  // 使用LOGGER的类的名字
  private static String className = "None";

  // 是否初始化
  public static boolean isInited = false;

  // 日志
  public static PrintWriter logWriter = null;

  // 日期格式
  private static SimpleDateFormat dateFormat = null;

  /**
   * 日志初始化
   *
   * @throws Exception
   */

  public static void init() throws Exception {

    if (isInited)
      return;
    try {
      // 是否在原来的文件上追加
      if (Properties.logType.equalsIgnoreCase("Append"))
        logWriter = new PrintWriter(new BufferedWriter(new FileWriter(
            Properties.logFile, true)), true);
      else
        logWriter = new PrintWriter(new BufferedWriter(new FileWriter(
            Properties.logFile, false)), true);

      dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
      isInited = true;
    } catch (Exception e) {
      System.out.println("logWriter initlizes failure!");
      throw e;
    }
  }

  /**
   * 写日志
   *
   * @param logLevel
   *   等级
   * @param logInfo
   *   log信息
   */
  private static void log(int logLevel, String logInfo, Class classIn) {
//    if (!isInited || logLevel <= Properties.logLevel || !isLog)
    if(!isInited)
      return;
    className = classIn.getName();
    try {
      if(logLevel<=Properties.logLevel){
        java.sql.Timestamp time = new java.sql.Timestamp(System
            .currentTimeMillis());
        if (logLevel == 1) {
          logWriter.print("在类" + className + "中产生[错误信息 "
              + dateFormat.format(time) + "] " + logInfo);
          // 是否在控制台显示
          if (Properties.ScreenLog)
            System.out.println("在类" + className + "中产生[错误信息 "
                + dateFormat.format(time) + "] " + logInfo);

        } else if (logLevel == 2) {
          logWriter.print("在类" + className + "中产生[一般信息 "
              + dateFormat.format(time) + "] " + logInfo);

          if (Properties.ScreenLog)
            System.out.println("在类" + className + "中产生[一般信息 "
                + dateFormat.format(time) + "] " + logInfo);

        } else {
          logWriter.print("在类" + className + "中产生[详细信息 "
              + dateFormat.format(time) + "] " + logInfo);

          if (Properties.ScreenLog)
            System.out.println("在类" + className + "中产生[详细信息 "
                + dateFormat.format(time) + "] " + logInfo);

        }
      }
      logWriter.println();
    } catch (Exception e) {
      System.out.println("Write LogFile Faulure [" + e.toString() + "]");
    }
  }

  /**
   * 写一般信息
   *
   * @param logInfo
   *   String
   */
  public static void info(String logInfo, Class classIn) {
    log(2, logInfo, classIn);
  }

  /**
   * 写调试信息
   *
   * @param logInfo
   *   String
   */
  public static void detail(String logInfo, Class classIn) {
    log(3, logInfo, classIn);
  }

  /**
   * 写错误信息
   *
   * @param logInfo
   *   String
   */
  public static void error(String logInfo, Class classIn) {
    log(1, logInfo, classIn);
  }

}

package com.ginger.framework.log;

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