web.xml中配置log4jConfigLocation属性:配置报错 

引用来自“838384855”的评论

log4j.rootCategory=debug, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %t %c{2}:%L - %m%n log4j.category.org.springframework.beans.factory=error  

public class Log4jConfigListener implements ServletContextListener {

	public void contextInitialized(ServletContextEvent event) {
		Log4jWebConfigurer.initLogging(event.getServletContext());
	}

	public void contextDestroyed(ServletContextEvent event) {
		Log4jWebConfigurer.shutdownLogging(event.getServletContext());
	}

}

public static void initLogging(ServletContext servletContext) {
		// Expose the web app root system property.
		if (exposeWebAppRoot(servletContext)) {
			WebUtils.setWebAppRootSystemProperty(servletContext);
		}

		// Only perform custom log4j initialization in case of a config file.
		String location = servletContext.getInitParameter(CONFIG_LOCATION_PARAM);
		if (location != null) {
			// Perform actual log4j initialization; else rely on log4j's default initialization.
			try {
				// Resolve system property placeholders before potentially
				// resolving a real path.
				location = SystemPropertyUtils.resolvePlaceholders(location);

				// Leave a URL (e.g. "classpath:" or "file:") as-is.
				if (!ResourceUtils.isUrl(location)) {
					// Consider a plain file path as relative to the web
					// application root directory.
					location = WebUtils.getRealPath(servletContext, location);
				}

				// Write log message to server log.
				servletContext.log("Initializing log4j from [" + location + "]");

				// Check whether refresh interval was specified.
				String intervalString = servletContext.getInitParameter(REFRESH_INTERVAL_PARAM);
				if (intervalString != null) {
					// Initialize with refresh interval, i.e. with log4j's watchdog thread,
					// checking the file in the background.
					try {
						long refreshInterval = Long.parseLong(intervalString);
						Log4jConfigurer.initLogging(location, refreshInterval);
					}
					catch (NumberFormatException ex) {
						throw new IllegalArgumentException("Invalid 'log4jRefreshInterval' parameter: " + ex.getMessage());
					}
				}
				else {
					// Initialize without refresh check, i.e. without log4j's watchdog thread.
					Log4jConfigurer.initLogging(location);
				}
			}
			catch (FileNotFoundException ex) {
				throw new IllegalArgumentException("Invalid 'log4jConfigLocation' parameter: " + ex.getMessage());
			}
		}
	}

public static final java.lang.String CLASSPATH_URL_PREFIX = "classpath:";
  
  // Field descriptor #73 Ljava/lang/String;
  public static final java.lang.String FILE_URL_PREFIX = "file:";
  
  // Field descriptor #73 Ljava/lang/String;
  public static final java.lang.String URL_PROTOCOL_FILE = "file";
  
  // Field descriptor #73 Ljava/lang/String;
  public static final java.lang.String URL_PROTOCOL_JAR = "jar";
  
  // Field descriptor #73 Ljava/lang/String;
  public static final java.lang.String URL_PROTOCOL_ZIP = "zip";