来自HttpStatus，记录一下

CONTINUE(100, "Continue"),

SWITCHING_PROTOCOLS(101, "Switching Protocols"),

PROCESSING(102, "Processing"),

CHECKPOINT(103, "Checkpoint"),

OK(200, "OK"),

CREATED(201, "Created"),

ACCEPTED(202, "Accepted"),

NON_AUTHORITATIVE_INFORMATION(203, "Non-Authoritative Information"),

NO_CONTENT(204, "No Content"),

RESET_CONTENT(205, "Reset Content"),

PARTIAL_CONTENT(206, "Partial Content"),

MULTI_STATUS(207, "Multi-Status"),

ALREADY_REPORTED(208, "Already Reported"),

IM_USED(226, "IM Used"),

MULTIPLE_CHOICES(300, "Multiple Choices"),

MOVED_PERMANENTLY(301, "Moved Permanently"),

FOUND(302, "Found"),

/** @deprecated */

@Deprecated

MOVED_TEMPORARILY(302, "Moved Temporarily"),

SEE_OTHER(303, "See Other"),

NOT_MODIFIED(304, "Not Modified"),

/** @deprecated */

@Deprecated

USE_PROXY(305, "Use Proxy"),

TEMPORARY_REDIRECT(307, "Temporary Redirect"),

PERMANENT_REDIRECT(308, "Permanent Redirect"),

BAD_REQUEST(400, "Bad Request"),

UNAUTHORIZED(401, "Unauthorized"),

PAYMENT_REQUIRED(402, "Payment Required"),

FORBIDDEN(403, "Forbidden"),

NOT_FOUND(404, "Not Found"),

METHOD_NOT_ALLOWED(405, "Method Not Allowed"),

NOT_ACCEPTABLE(406, "Not Acceptable"),

PROXY_AUTHENTICATION_REQUIRED(407, "Proxy Authentication Required"),

REQUEST_TIMEOUT(408, "Request Timeout"),

CONFLICT(409, "Conflict"),

GONE(410, "Gone"),

LENGTH_REQUIRED(411, "Length Required"),

PRECONDITION_FAILED(412, "Precondition Failed"),

PAYLOAD_TOO_LARGE(413, "Payload Too Large"),

/** @deprecated */

@Deprecated

REQUEST_ENTITY_TOO_LARGE(413, "Request Entity Too Large"),

URI_TOO_LONG(414, "URI Too Long"),

/** @deprecated */

@Deprecated

REQUEST_URI_TOO_LONG(414, "Request-URI Too Long"),

UNSUPPORTED_MEDIA_TYPE(415, "Unsupported Media Type"),

REQUESTED_RANGE_NOT_SATISFIABLE(416, "Requested range not satisfiable"),

EXPECTATION_FAILED(417, "Expectation Failed"),

I_AM_A_TEAPOT(418, "I'm a teapot"),

/** @deprecated */

@Deprecated

INSUFFICIENT_SPACE_ON_RESOURCE(419, "Insufficient Space On Resource"),

/** @deprecated */

@Deprecated

METHOD_FAILURE(420, "Method Failure"),

/** @deprecated */

@Deprecated

DESTINATION_LOCKED(421, "Destination Locked"),

UNPROCESSABLE_ENTITY(422, "Unprocessable Entity"),

LOCKED(423, "Locked"),

FAILED_DEPENDENCY(424, "Failed Dependency"),

UPGRADE_REQUIRED(426, "Upgrade Required"),

PRECONDITION_REQUIRED(428, "Precondition Required"),

TOO_MANY_REQUESTS(429, "Too Many Requests"),

REQUEST_HEADER_FIELDS_TOO_LARGE(431, "Request Header Fields Too Large"),

UNAVAILABLE_FOR_LEGAL_REASONS(451, "Unavailable For Legal Reasons"),

INTERNAL_SERVER_ERROR(500, "Internal Server Error"),

NOT_IMPLEMENTED(501, "Not Implemented"),

BAD_GATEWAY(502, "Bad Gateway"),

SERVICE_UNAVAILABLE(503, "Service Unavailable"),

GATEWAY_TIMEOUT(504, "Gateway Timeout"),

HTTP_VERSION_NOT_SUPPORTED(505, "HTTP Version not supported"),

VARIANT_ALSO_NEGOTIATES(506, "Variant Also Negotiates"),

INSUFFICIENT_STORAGE(507, "Insufficient Storage"),

LOOP_DETECTED(508, "Loop Detected"),

BANDWIDTH_LIMIT_EXCEEDED(509, "Bandwidth Limit Exceeded"),

NOT_EXTENDED(510, "Not Extended"),

NETWORK_AUTHENTICATION_REQUIRED(511, "Network Authentication Required");