java不通过配置文件初始化logger示例

复制代码 代码如下:
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.FileAppender;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;

public class LoggerUtils {

 
 public static Logger getLogger(Class clazz, boolean ifConsole, boolean ifFile, String logFile, boolean ifLocate) {

  if(ifConsole == false && ifFile == false) return null;

  if(ifFile == true && logFile.trim().length() < 1) return null;

  String conversionPattern;
  if(ifLocate == true) {
   // 日志内容形式如：2014-03-11 01:34:45.572 [DEBUG] com.aliyun.qa.utils.LoggerUtilsTest.main(Line:15): 测试DEBUG日志
   conversionPattern = "%d{yyyy-MM-dd HH:mm:ss.SSS} [%-5p] %c.%M(Line:%L): %m %n";
  } else {
   // 日志内容形式如：2014-03-11 01:34:45.572 [DEBUG] : 测试DEBUG日志
   conversionPattern = "%d{yyyy-MM-dd HH:mm:ss.SSS} [%-5p] : %m %n";
  }
  PatternLayout layout = new PatternLayout();
  layout.setConversionPattern(conversionPattern);

  Logger logger = Logger.getLogger(clazz);
  logger.removeAllAppenders();
  logger.setLevel(Level.DEBUG);
  logger.setAdditivity(false);     // Logger不会在父Logger的appender里输出，默认为true

  if(ifConsole == true) {  // 日志输出到控制台
   ConsoleAppender consoleAppender = new ConsoleAppender();
   consoleAppender.setLayout(layout);
   consoleAppender.setThreshold(Level.INFO);  // ConsoleAppender日志级别为DEBUG
   consoleAppender.activateOptions();
   logger.addAppender(consoleAppender);
  }

  if(ifFile == true) {  // 日志输出到文件
   FileAppender fileAppender = new FileAppender();
   fileAppender.setLayout(layout);
   fileAppender.setFile(logFile);
   fileAppender.setEncoding("UTF-8");
   fileAppender.setAppend(true);
   fileAppender.setThreshold(Level.INFO);   // FileAppender日志级别为INFO
   fileAppender.activateOptions();
   logger.addAppender(fileAppender);
  }

  return logger;
 }

 
 public static Logger getLogger(Class clazz, boolean ifLocate) {
  return getLogger(clazz, true, false, null, ifLocate);
 }

 
 public static Logger getLogger(Class clazz, String logFile, boolean ifLocate) {
  return getLogger(clazz, false, true, logFile, ifLocate);
 }

}