Util.java 文件源码

/**
* Initializes logging to a file.
* @param loggerNames the names of the loggers (usually names of packages
* or classes or ancestors of packages or classes). Can't be null.
* @param argMap command line arguments.
*/
public static synchronized void initFileLogging(String[] loggerNames, ArgumentMap argMap, String filename)
    throws IOException
{
    Level level = DEFAULT_FILE_LOGGING_LEVEL;
    if (argMap.isSet(Argument.LOG_QUIET_SHORT) || argMap.isSet(Argument.LOG_QUIET)) level = Level.ERROR;
    if (argMap.isSet(Argument.LOG_VERBOSE_SHORT) || argMap.isSet(Argument.LOG_VERBOSE)) level = Level.INFO;
    if (argMap.isSet(Argument.LOG_DEBUG_SHORT) || argMap.isSet(Argument.DEBUG)) level = Level.DEBUG;

    FileAppender fileAppender = new FileAppender(new PatternLayout(), filename);

    boolean append = true;
    Writer fileWriter = new FileWriter(filename, append);
    for (String loggerName : loggerNames)
        Log4jInit.setLevel(loggerName, level, fileWriter);
}