Java 清除当前线程local

背景：异步线程执行excel上传oss后资源未释放。内存随着上传次数逐渐升高。

解决：上传操作结束清除当前线程local。

/**
 * 上海xx信息科技有限公司
 *
 * @author JinLi
 * @description
 * @email jinli@theduapp.com
 * @date 2020/6/17
 */
public class ThreadLocalUtil {
    /**
     * 清除当前线程的threadLocals
     */
    public static void cleanCurrentThreadLocal() {
        Thread currentThread = Thread.currentThread();
        try {
            Field field = Thread.class.getDeclaredField("threadLocals");
            field.setAccessible(true);
            Object threadLocals = field.get(currentThread);
            if (threadLocals != null) {
                field.set(currentThread, null);
            }
        } catch (NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}