示例
代码语言：javascript复制@Slf4j
class Test {
private static final SimpleDateFormat FORMATTER = new SimpleDateFormat("yyyy-MM-dd");
public static void main(String[] args) {
ExecutorService executorService = Executors.newFixedThreadPool(10);
for (int i = 0; i < 10; i ) {
executorService.submit(() -> {
Calendar calendar = Calendar.getInstance();
String time = "2021-" (int) (Math.random() * 10) "-" (int) (Math.random() * 10);
try {
calendar.setTime(FORMATTER.parse(time));
// 根据请求中的时间往后推算月数
calendar.add(Calendar.MONTH, 6);
log.info(time "--->" FORMATTER.format(calendar.getTime()));
} catch (ParseException e) {
e.printStackTrace();
}
});
}
}
}结果
代码语言：javascript复制14:42:17.971 [pool-1-thread-9] INFO Test - 2021-3-1--->117622972-02-29
14:42:17.971 [pool-1-thread-5] INFO Test - 2021-7-7--->117622972-02-29
14:42:17.971 [pool-1-thread-8] INFO Test - 2021-4-7--->117622972-02-29
14:42:17.971 [pool-1-thread-1] INFO Test - 2021-9-9--->0007-09-01可以看到，结果不对，也死锁了。
