本文整理了Java中freemarker.log.Logger类的一些代码示例，展示了Logger类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Logger类的具体详情如下：
包路径：freemarker.log.Logger
类名称：Logger

Logger介绍

[英]Delegates logger creation to an actual logging library. By default it looks for logger libraries in this order (in FreeMarker 2.3.x): Log4J, Avalon LogKit, JUL (i.e., java.util.logging). Prior to FreeMarker 2.4, SLF4J and Apache Commons Logging aren't searched automatically due to backward compatibility constraints. But if you have log4j-over-slf4j properly installed (means, you have no real Log4j in your class path, and SLF4J has a backing implementation like logback-classic), then FreeMarker will use SLF4J directly instead of Log4j (since FreeMarker 2.3.22).

If the auto detection sequence describet above doesn't give you the result that you want, see #SYSTEM_PROPERTY_NAME_LOGGER_LIBRARY.
[中]将记录器创建委托给实际的日志库。默认情况下，它按以下顺序查找记录器库（在FreeMarker 2.3.x中）：Log4J、Avalon LogKit、JUL（即java.util.logging）。在FreeMarker 2.4之前，由于向后兼容性限制，SLF4J和Apache Commons日志不会自动搜索。但是，如果您正确安装了log4j-over-slf4j（这意味着，您的类路径中没有真正的log4j，并且slf4j具有类似logback classic的支持实现），那么FreeMarker将直接使用slf4j而不是log4j（自FreeMarker 2.3.22以来）。
如果上面的自动检测序列描述没有给出您想要的结果，请参阅#系统(u属性)名称(u记录器)库。

代码示例

代码示例来源：origin: org.freemarker/freemarker

private static Class getClass(String className) {
  try {
    return ClassUtil.forName(className);
  } catch (Exception e) {
    if (LOG.isDebugEnabled()) {
      LOG.debug("Couldn't load class " + className, e);
    }
    return null;
  }
}

代码示例来源：origin: org.freemarker/freemarker

private static ExpressionFactory tryExpressionFactoryImplementation(String packagePrefix) {
  String className = packagePrefix + ".el.ExpressionFactoryImpl";
  try {
    Class cl = ClassUtil.forName(className);
    if (ExpressionFactory.class.isAssignableFrom(cl)) {
      LOG.info("Using " + className + " as implementation of " + 
          ExpressionFactory.class.getName());
      return (ExpressionFactory) cl.newInstance();
    }
    LOG.warn("Class " + className + " does not implement " + 
        ExpressionFactory.class.getName());
  } catch (ClassNotFoundException e) {
  } catch (Exception e) {
    LOG.error("Failed to instantiate " + className, e);
  }
  return null;
}

代码示例来源：origin: org.freemarker/freemarker

private void onSameNameClassesDetected(String className) {
  // TODO: This behavior should be pluggable, as in environments where
  // some classes are often reloaded or multiple versions of the
  // same class is normal (OSGi), this will drop the cache contents
  // too often.
  if (LOG.isInfoEnabled()) {
    LOG.info(
        "Detected multiple classes with the same name, \"" + className +
            "\". Assuming it was a class-reloading. Clearing class introspection " +
            "caches to release old data.");
  }
  forcedClearCache();
}

代码示例来源：origin: org.freemarker/freemarker

public void report(TemplateException te, Environment env) {
  String message = "Error executing FreeMarker template part in the #attempt block";
  if (!logAsWarn) {
    LOG.error(message, te);
  } else {
    LOG.warn(message, te);
  }
}

代码示例来源：origin: org.freemarker/freemarker

TldParserForTaglibBuilding(ObjectWrapper wrapper) {
  if (wrapper instanceof BeansWrapper) {
    beansWrapper = (BeansWrapper) wrapper;
  } else {
    beansWrapper = null;
    if (LOG.isWarnEnabled()) {
      LOG.warn("Custom EL functions won't be loaded because "
          + (wrapper == null
              ? "no ObjectWrapper was specified for the TaglibFactory "
                  + "(via TaglibFactory.setObjectWrapper(...), exists since 2.3.22)"
              : "the ObjectWrapper wasn't instance of " + BeansWrapper.class.getName())
          + ".");
    }
  }
}

代码示例来源：origin: org.uberfire/uberfire-workbench-processors

protected AbstractErrorAbsorbingProcessor() {
  try {
    freemarker.log.Logger.selectLoggerLibrary(freemarker.log.Logger.LIBRARY_NONE);
  } catch (ClassNotFoundException e) {
    rememberedInitError = e;
  }
}

代码示例来源：origin: org.freemarker/freemarker

public void stop() {
    this.stop = true;
    if (serverSocket != null) {
      try {
        serverSocket.close();
      } catch (IOException e) {
        LOG.error("Unable to close server socket.", e);
      }
    }
  }
}

代码示例来源：origin: org.freemarker/freemarker

private void addTldLocationsFromFileDirectory(final File dir) throws IOException, SAXException {
  if (dir.isDirectory()) {
    if (LOG.isDebugEnabled()) {
      LOG.debug("Scanning for *.tld-s in File directory: " + StringUtil.jQuoteNoXSS(dir));
    }
    File[] tldFiles = dir.listFiles(new FilenameFilter() {

      public boolean accept(File urlAsFile, String name) {
        return isTldFileNameIgnoreCase(name);
      }

    });
    if (tldFiles == null) {
      throw new IOException("Can't list this directory for some reason: " + dir);
    }
    for (int i = 0; i < tldFiles.length; i++) {
      final File file = tldFiles[i];
      addTldLocationFromTld(new FileTldLocation(file));
    }
  } else {
    LOG.warn("Skipped scanning for *.tld for non-existent directory: " + StringUtil.jQuoteNoXSS(dir));
  }
}

代码示例来源：origin: org.freemarker/freemarker

private static void logInLogger(boolean error, String message, Throwable exception) {
  boolean canUseRealLogger;
  synchronized (Logger.class) {
    canUseRealLogger = loggerFactory != null && !(loggerFactory instanceof _NullLoggerFactory);
  }
  if (canUseRealLogger) {
    try {
      final Logger logger = Logger.getLogger("freemarker.logger");
      if (error) {
        logger.error(message);
      } else {
        logger.warn(message);
      }
    } catch (Throwable e) {
      canUseRealLogger = false;
    }
  }
  if (!canUseRealLogger) {
    System.err.println((error ? "ERROR" : "WARN") + " "
        + LoggerFactory.class.getName() + ": " + message);
    if (exception != null) {
      System.err.println("\tException: " + tryToString(exception));
      while (exception.getCause() != null) {
        exception = exception.getCause();
        System.err.println("\tCaused by: " + tryToString(exception));
      }
    }
  }
}

代码示例来源：origin: org.freemarker/freemarker

if (getLogTemplateExceptions() && LOG.isErrorEnabled()
  LOG.error("Error executing FreeMarker template", templateException);

代码示例来源：origin: org.freemarker/freemarker

/**
 * Convenience method. Tells the system to use Xalan for XPath queries.
 * @throws Exception if the Xalan XPath classes are not present.
 */
static public void useXalanXPathSupport() throws Exception {
  Class.forName("org.apache.xpath.XPath");
  Class c = Class.forName("freemarker.ext.dom.XalanXPathSupport");
  synchronized (STATIC_LOCK) {
    xpathSupportClass = c;
  }
  LOG.debug("Using Xalan classes for XPath support");
}

代码示例来源：origin: org.freemarker/freemarker

LOG.debug("Looking for TLD locations in TLD-s specified in cfg.classpathTlds");
    in = tldLocation.getInputStream();
  } catch (IOException e) {
    if (LOG.isWarnEnabled()) {
      LOG.warn("Ignored classpath TLD location " + StringUtil.jQuoteNoXSS(tldResourcePath)
          + " because of error", e);

代码示例来源：origin: org.freemarker/freemarker

LOG.info("Failed to check if finetuneMethodAppearance is overidden in " + thisClass.getName()
    + "; acting like if it was, but this way it won't utilize the shared class introspection "
    + "cache.",
  LOG.warn("Overriding " + BeansWrapper.class.getName() + ".finetuneMethodAppearance is deprecated "
      + "and will be banned sometimes in the future. Use setMethodAppearanceFineTuner instead.");
  ftmaDeprecationWarnLogged = true;

代码示例来源：origin: org.freemarker/freemarker

/**
 * Logs flag warning for a limited number of times. This is used to prevent
 * log flooding.
 */
static void logFlagWarning(String message) {
  if (!flagWarningsEnabled) return;
  
  int cnt;
  synchronized (flagWarningsCntSync) {
    cnt = flagWarningsCnt;
    if (cnt < MAX_FLAG_WARNINGS_LOGGED) {
      flagWarningsCnt++;
    } else {
      flagWarningsEnabled = false;
      return;
    }
  }
  message += " This will be an error in some later FreeMarker version!";
  if (cnt + 1 == MAX_FLAG_WARNINGS_LOGGED) {
    message += " [Will not log more regular expression flag problems until restart!]";
  }
  LOG.warn(message);
}

代码示例来源：origin: org.freemarker/freemarker

if (wrapper.isStrict()) {
  throw new InvalidPropertyException("No such bean property: " + key);
} else if (LOG.isDebugEnabled()) {
  logNoSuchKey(key, classInfo);

代码示例来源：origin: org.freemarker/com.springsource.freemarker

logger.info("Overwriting value [" + obj + "] for " +
    " key '" + name + "' with [" + method + 
    "] in static model for " + clazz.getName());

代码示例来源：origin: kiegroup/appformer

protected AbstractErrorAbsorbingProcessor() {
  try {
    freemarker.log.Logger.selectLoggerLibrary(freemarker.log.Logger.LIBRARY_NONE);
  } catch (ClassNotFoundException e) {
    rememberedInitError = e;
  }
}

代码示例来源：origin: org.freemarker/freemarker

private ServletException newServletExceptionWithFreeMarkerLogging(String message, Throwable cause) throws ServletException {
  if (cause instanceof TemplateException) {
    // For backward compatibility, we log into the same category as Environment did when
    // log_template_exceptions was true.
    LOG_RT.error(message, cause);
  } else {
    LOG.error(message, cause);
  }
  ServletException e = new ServletException(message, cause);
  try {
    // Prior to Servlet 2.5, the cause exception wasn't set by the above constructor.
    // If we are on 2.5+ then this will throw an exception as the cause was already set.
    e.initCause(cause);
  } catch (Exception ex) {
    // Ignored; see above
  }
  throw e;
}

代码示例来源：origin: org.freemarker/com.springsource.freemarker

private void handleTemplateException(TemplateException te)
  throws TemplateException
{
  // Logic to prevent double-handling of the exception in
  // nested visit() calls.
  if(lastThrowable == te) {
    throw te;
  }
  lastThrowable = te;
  // Log the exception
  if(logger.isErrorEnabled()) {
    logger.error("Template processing error: " + StringUtil.jQuoteNoXSS(te.getMessage()), te);
  }
  // Stop exception is not passed to the handler, but
  // explicitly rethrown.
  if(te instanceof StopException) {
    throw te;
  }
  // Finally, pass the exception to the handler
  getTemplateExceptionHandler().handleTemplateException(te, this, out);
}

代码示例来源：origin: org.freemarker/freemarker

static public void useSunInternalXPathSupport() throws Exception {
  Class.forName("com.sun.org.apache.xpath.internal.XPath");
  Class c = Class.forName("freemarker.ext.dom.SunInternalXalanXPathSupport");
  synchronized (STATIC_LOCK) {
    xpathSupportClass = c;
  }
  LOG.debug("Using Sun's internal Xalan classes for XPath support");
}