简单的ThreadLocal工具类

public class ThreadLocalUtil {

    private static final ThreadLocal<Map<String, Object>> threadLocal = ThreadLocal.withInitial(() -> new HashMap<>(10));

    public static Map<String, Object> getThreadLocal() {
        return threadLocal.get();
    }

    public static <T> T get(String key) {
        Map<String, Object> map = threadLocal.get();
        return get(key, null);
    }

    @SuppressWarnings("unchecked")
    public static <T> T get(String key, T defaultValue) {
        Map<String, Object> map = threadLocal.get();
        return (T) Optional.ofNullable(map.get(key)).orElse(defaultValue);
    }

    public static void set(String key, Object value) {
        Map<String, Object> map = threadLocal.get();
        map.put(key, value);
    }

    public static void set(Map<String, Object> keyValueMap) {
        Map<String, Object> map = threadLocal.get();
        map.putAll(keyValueMap);
    }

    public static void remove() {
        threadLocal.remove();
    }

    @SuppressWarnings("unchecked")
    public static <T> T remove(String key) {
        Map<String, Object> map = threadLocal.get();
        return (T) map.remove(key);
    }

}

最后

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