本文整理了Java中java.lang.System.currentTimeMillis()方法的一些代码示例，展示了System.currentTimeMillis()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。System.currentTimeMillis()方法的具体详情如下：
包路径：java.lang.System
类名称：System
方法名：currentTimeMillis
[英]Returns the current time in milliseconds since January 1, 1970 00:00:00.0 UTC.
This method always returns UTC times, regardless of the system's time zone. This is often called "Unix time" or "epoch time". Use a java.text.DateFormat instance to format this time for display to a human.
This method shouldn't be used for measuring timeouts or other elapsed time measurements, as changing the system time can affect the results. Use #nanoTime for that.
[中]返回自1970年1月1日00:00:00.0 UTC以来的当前时间（毫秒）。
无论系统的时区如何，此方法始终返回UTC时间。这通常被称为“Unix时间”或“大纪元时间”。使用java语言。文本DateFormat实例，用于格式化此时间以显示给用户。
此方法不应用于测量超时或其他运行时间测量，因为更改系统时间可能会影响结果。用纳米时间来做这件事。
代码示例来源：origin: spring-projects/spring-framework
/**
* Start the expiration period for this instance.
* @param timeToLive the number of seconds before expiration
*/
public void startExpirationPeriod(int timeToLive) {
this.expirationTime = System.currentTimeMillis() + timeToLive * 1000;
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return whether this instance has expired depending on the amount of
* elapsed time since the call to {@link #startExpirationPeriod}.
*/
public boolean isExpired() {
return (this.expirationTime != -1 && System.currentTimeMillis() > this.expirationTime);
}代码示例来源：origin: spring-projects/spring-framework
/**
* Create a new ApplicationEvent.
* @param source the object on which the event initially occurred (never {@code null})
*/
public ApplicationEvent(Object source) {
super(source);
this.timestamp = System.currentTimeMillis();
}代码示例来源：origin: ReactiveX/RxJava
/**
* Returns the 'current time' of the Scheduler in the specified time unit.
* @param unit the time unit
* @return the 'current time'
* @since 2.0
*/
public long now(@NonNull TimeUnit unit) {
return unit.convert(System.currentTimeMillis(), TimeUnit.MILLISECONDS);
}代码示例来源：origin: ReactiveX/RxJava
/**
* Returns the 'current time' of the Worker in the specified time unit.
* @param unit the time unit
* @return the 'current time'
* @since 2.0
*/
public long now(@NonNull TimeUnit unit) {
return unit.convert(System.currentTimeMillis(), TimeUnit.MILLISECONDS);
}代码示例来源：origin: square/okhttp
/**
* Sets the certificate to be valid immediately and until the specified duration has elapsed.
* The precision of this field is seconds; further precision will be truncated.
*/
public Builder duration(long duration, TimeUnit unit) {
long now = System.currentTimeMillis();
return validityInterval(now, now + unit.toMillis(duration));
}代码示例来源：origin: square/okhttp
/**
* Attempt to parse a {@code Set-Cookie} HTTP header value {@code setCookie} as a cookie. Returns
* null if {@code setCookie} is not a well-formed cookie.
*/
public static @Nullable Cookie parse(HttpUrl url, String setCookie) {
return parse(System.currentTimeMillis(), url, setCookie);
}代码示例来源：origin: spring-projects/spring-framework
@Override
public final synchronized void refresh() {
logger.debug("Attempting to refresh target");
this.targetObject = freshTarget();
this.refreshCount++;
this.lastRefreshTime = System.currentTimeMillis();
logger.debug("Target refreshed successfully");
}代码示例来源：origin: spring-projects/spring-framework
private void updateSessionReadTime(@Nullable String sessionId) {
if (sessionId != null) {
SessionInfo info = this.sessions.get(sessionId);
if (info != null) {
info.setLastReadTime(System.currentTimeMillis());
}
}
}代码示例来源：origin: ReactiveX/RxJava
@Override
public void run() {
times.add(System.currentTimeMillis());
}
}, 100, 100, TimeUnit.MILLISECONDS);代码示例来源：origin: ReactiveX/RxJava
@Override
public void run() {
times.add(System.currentTimeMillis());
}
}, 100, 100, TimeUnit.MILLISECONDS);代码示例来源：origin: spring-projects/spring-framework
@Override
public ScheduledFuture<?> scheduleAtFixedRate(Runnable task, Date startTime, long period) {
long initialDelay = startTime.getTime() - System.currentTimeMillis();
try {
return this.scheduledExecutor.scheduleAtFixedRate(decorateTask(task, true), initialDelay, period, TimeUnit.MILLISECONDS);
}
catch (RejectedExecutionException ex) {
throw new TaskRejectedException("Executor [" + this.scheduledExecutor + "] did not accept task: " + task, ex);
}
}代码示例来源：origin: ReactiveX/RxJava
void sleep() throws Exception {
cb.await();
try {
long before = System.currentTimeMillis();
Thread.sleep(5000);
throw new IllegalStateException("Was not interrupted in time?! " + (System.currentTimeMillis() - before));
} catch (InterruptedException ex) {
// ignored here
}
}代码示例来源：origin: ReactiveX/RxJava
void beforeCancelSleep(BaseTestConsumer<?, ?> ts) throws Exception {
long before = System.currentTimeMillis();
Thread.sleep(50);
if (System.currentTimeMillis() - before > 100) {
ts.dispose();
throw new IllegalStateException("Overslept?" + (System.currentTimeMillis() - before));
}
}代码示例来源：origin: spring-projects/spring-framework
public WebResponse build() throws IOException {
WebResponseData webResponseData = webResponseData();
long endTime = System.currentTimeMillis();
return new WebResponse(webResponseData, this.webRequest, endTime - this.startTime);
}代码示例来源：origin: spring-projects/spring-framework
@Override
public ScheduledFuture<?> schedule(Runnable task, Date startTime) {
ScheduledExecutorService executor = getScheduledExecutor();
long initialDelay = startTime.getTime() - System.currentTimeMillis();
try {
return executor.schedule(errorHandlingTask(task, false), initialDelay, TimeUnit.MILLISECONDS);
}
catch (RejectedExecutionException ex) {
throw new TaskRejectedException("Executor [" + executor + "] did not accept task: " + task, ex);
}
}代码示例来源：origin: spring-projects/spring-framework
@Override
public ScheduledFuture<?> scheduleWithFixedDelay(Runnable task, Date startTime, long delay) {
ScheduledExecutorService executor = getScheduledExecutor();
long initialDelay = startTime.getTime() - System.currentTimeMillis();
try {
return executor.scheduleWithFixedDelay(errorHandlingTask(task, true), initialDelay, delay, TimeUnit.MILLISECONDS);
}
catch (RejectedExecutionException ex) {
throw new TaskRejectedException("Executor [" + executor + "] did not accept task: " + task, ex);
}
}代码示例来源：origin: ReactiveX/RxJava
@Override
public void subscribe(Subscriber<? super String> t1) {
t1.onSubscribe(new BooleanSubscription());
System.out.println(count.get() + " @ " + String.valueOf(last - System.currentTimeMillis()));
last = System.currentTimeMillis();
if (count.getAndDecrement() == 0) {
t1.onNext("hello");
t1.onComplete();
} else {
t1.onError(new RuntimeException());
}
}代码示例来源：origin: ReactiveX/RxJava
@Override
public void subscribe(Observer<? super String> t1) {
t1.onSubscribe(Disposables.empty());
System.out.println(count.get() + " @ " + String.valueOf(last - System.currentTimeMillis()));
last = System.currentTimeMillis();
if (count.getAndDecrement() == 0) {
t1.onNext("hello");
t1.onComplete();
} else {
t1.onError(new RuntimeException());
}
}代码示例来源：origin: spring-projects/spring-framework
public void testSendAttributeChangeNotificationWhereSourceIsNotTheManagedResource() throws Exception {
StubSpringModelMBean mbean = new StubSpringModelMBean();
Notification notification = new AttributeChangeNotification(this, 1872, System.currentTimeMillis(), "Shall we break for some tea?", "agree", "java.lang.Boolean", Boolean.FALSE, Boolean.TRUE);
ObjectName objectName = createObjectName();
NotificationPublisher publisher = new ModelMBeanNotificationPublisher(mbean, objectName, mbean);
publisher.sendNotification(notification);
assertNotNull(mbean.getActualNotification());
assertTrue(mbean.getActualNotification() instanceof AttributeChangeNotification);
assertSame("The exact same Notification is not being passed through from the publisher to the mbean.", notification, mbean.getActualNotification());
assertSame("The 'source' property of the Notification is *wrongly* being set to the ObjectName of the associated MBean.", this, mbean.getActualNotification().getSource());
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