SpringBoot的reload加载器的方法

 /** * Returns the {@code Class} object associated with the class or * interface with the given string name. Invoking this method is * equivalent to: * * <blockquote> * {@code Class.forName(className, true, currentLoader)} * </blockquote> * * where {@code currentLoader} denotes the defining class loader of * the current class. * * <p> For example, the following code fragment returns the * runtime {@code Class} descriptor for the class named * {@code java.lang.Thread}: * * <blockquote> *  {@code Class t = Class.forName("java.lang.Thread")} * </blockquote> * </p><p> * A call to {@code forName("X")} causes the class named * {@code X} to be initialized. * * @param   className  the fully qualified name of the desired class. * @return   the {@code Class} object for the class with the *       specified name. * @exception LinkageError if the linkage fails * @exception ExceptionInInitializerError if the initialization provoked *      by this method fails * @exception ClassNotFoundException if the class cannot be located */ public static Class forName(String className) throws ClassNotFoundException { return forName0(className, true, ClassLoader.getCallerClassLoader()); }

  org.springframework.bootspring-boot-devtoolstrue

 spring.devtools.restart.enabled=false

 private void onApplicationStartingEvent(ApplicationStartingEvent event) { // It's too early to use the Spring environment but we should still allow // users to disable restart using a System property. String enabled = System.getProperty(ENABLED_PROPERTY); if (enabled == null || Boolean.parseBoolean(enabled)) { String[] args = event.getArgs(); DefaultRestartInitializer initializer = new DefaultRestartInitializer(); boolean restartOnInitialize = !AgentReloader.isActive(); Restarter.initialize(args, false, initializer, restartOnInitialize); } else { Restarter.disable(); } } 

 -Dspring.devtools.restart.enabled=false

 /** * Restart properties. */ public static class Restart { private static final String DEFAULT_RESTART_EXCLUDES = "META-INF/maven/**," + "META-INF/resources/**,resources/**,static/**,public/**,templates/**," + "**/*Test.class,**/*Tests.class,git.properties,META-INF/build-info.properties"; private static final long DEFAULT_RESTART_POLL_INTERVAL = 1000; private static final long DEFAULT_RESTART_QUIET_PERIOD = 400; /** * Enable automatic restart. */ private boolean enabled = true; /** * Patterns that should be excluded from triggering a full restart. */ private String exclude = DEFAULT_RESTART_EXCLUDES; /** * Additional patterns that should be excluded from triggering a full restart. */ private String additionalExclude; /** * Amount of time (in milliseconds) to wait between polling for classpath changes. */ private long pollInterval = DEFAULT_RESTART_POLL_INTERVAL; /** * Amount of quiet time (in milliseconds) required without any classpath changes * before a restart is triggered. */ private long quietPeriod = DEFAULT_RESTART_QUIET_PERIOD; /** * Name of a specific file that when changed will trigger the restart check. If * not specified any classpath file change will trigger the restart. */ private String triggerFile; /** * Additional paths to watch for changes. */ private List additionalPaths = new ArrayList(); public boolean isEnabled() { return this.enabled; } public void setEnabled(boolean enabled) { this.enabled = enabled; }

 /** * Local Restart Configuration. */ @ConditionalOnProperty(prefix = "spring.devtools.restart", name = "enabled", matchIfMissing = true) static class RestartConfiguration { @Autowired private DevToolsProperties properties; @EventListener public void onClassPathChanged(ClassPathChangedEvent event) { if (event.isRestartRequired()) { Restarter.getInstance().restart( new FileWatchingFailureHandler(fileSystemWatcherFactory())); } } @Bean @ConditionalOnMissingBean public ClassPathFileSystemWatcher classPathFileSystemWatcher() { URL[] urls = Restarter.getInstance().getInitialUrls(); ClassPathFileSystemWatcher watcher = new ClassPathFileSystemWatcher( fileSystemWatcherFactory(), classPathRestartStrategy(), urls); watcher.setStopWatcherOnRestart(true); return watcher; } @Bean @ConditionalOnMissingBean public ClassPathRestartStrategy classPathRestartStrategy() { return new PatternClassPathRestartStrategy( this.properties.getRestart().getAllExclude()); } @Bean public HateoasObjenesisCacheDisabler hateoasObjenesisCacheDisabler() { return new HateoasObjenesisCacheDisabler(); } @Bean public FileSystemWatcherFactory fileSystemWatcherFactory() { return new FileSystemWatcherFactory() { @Override public FileSystemWatcher getFileSystemWatcher() { return newFileSystemWatcher(); } }; } private FileSystemWatcher newFileSystemWatcher() { Restart restartProperties = this.properties.getRestart(); FileSystemWatcher watcher = new FileSystemWatcher(true, restartProperties.getPollInterval(), restartProperties.getQuietPeriod()); String triggerFile = restartProperties.getTriggerFile(); if (StringUtils.hasLength(triggerFile)) { watcher.setTriggerFilter(new TriggerFileFilter(triggerFile)); } List additionalPaths = restartProperties.getAdditionalPaths(); for (File path : additionalPaths) { watcher.addSourceFolder(path.getAbsoluteFile()); } return watcher; } } } 

 mvn clean