java中的不同的key类型从map中获取不同的value值

protected <V> V getValFromMap(Map<String, Object> headers, String name, Class<V> type) {
Object value = headers.get(name);
if (value == null) {
return null;
}
if (!type.isAssignableFrom(value.getClass())) {
if (logger.isWarnEnabled()) {
logger.warn("Skipping header ‘" + name + "‘expected type [" + type + "], but got [" +
value.getClass() + "]");
}
return null;
}
else {
return type.cast(value);
}
}

原文地址：https://www.cnblogs.com/nizuimeiabc1/p/9605452.html