HTTP 状态

HTTP 状态

 

 

 

/** Copyright 2002-2021 the original author or authors.** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at**      https://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/package org.springframework.http;import org.springframework.lang.Nullable;/*** Enumeration of HTTP status codes.** <p>The HTTP status code series can be retrieved via {@link #series()}.** @author Arjen Poutsma* @author Sebastien Deleuze* @author Brian Clozel* @since 3.0* @see HttpStatus.Series* @see <a href="https://www.iana.org/assignments/http-status-codes">HTTP Status Code Registry</a>* @see <a href="https://en.wikipedia.org/wiki/List_of_HTTP_status_codes">List of HTTP status codes - Wikipedia</a>*/
public enum HttpStatus {// 1xx Informational/*** {@code 100 Continue}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.2.1">HTTP/1.1: Semantics and Content, section 6.2.1</a>*/CONTINUE(100, Series.INFORMATIONAL, "Continue"),/*** {@code 101 Switching Protocols}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.2.2">HTTP/1.1: Semantics and Content, section 6.2.2</a>*/SWITCHING_PROTOCOLS(101, Series.INFORMATIONAL, "Switching Protocols"),/*** {@code 102 Processing}.* @see <a href="https://tools.ietf.org/html/rfc2518#section-10.1">WebDAV</a>*/PROCESSING(102, Series.INFORMATIONAL, "Processing"),/*** {@code 103 Checkpoint}.* @see <a href="https://code.google.com/p/gears/wiki/ResumableHttpRequestsProposal">A proposal for supporting* resumable POST/PUT HTTP requests in HTTP/1.0</a>*/CHECKPOINT(103, Series.INFORMATIONAL, "Checkpoint"),// 2xx Success/*** {@code 200 OK}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.3.1">HTTP/1.1: Semantics and Content, section 6.3.1</a>*/OK(200, Series.SUCCESSFUL, "OK"),/*** {@code 201 Created}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.3.2">HTTP/1.1: Semantics and Content, section 6.3.2</a>*/CREATED(201, Series.SUCCESSFUL, "Created"),/*** {@code 202 Accepted}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.3.3">HTTP/1.1: Semantics and Content, section 6.3.3</a>*/ACCEPTED(202, Series.SUCCESSFUL, "Accepted"),/*** {@code 203 Non-Authoritative Information}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.3.4">HTTP/1.1: Semantics and Content, section 6.3.4</a>*/NON_AUTHORITATIVE_INFORMATION(203, Series.SUCCESSFUL, "Non-Authoritative Information"),/*** {@code 204 No Content}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.3.5">HTTP/1.1: Semantics and Content, section 6.3.5</a>*/NO_CONTENT(204, Series.SUCCESSFUL, "No Content"),/*** {@code 205 Reset Content}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.3.6">HTTP/1.1: Semantics and Content, section 6.3.6</a>*/RESET_CONTENT(205, Series.SUCCESSFUL, "Reset Content"),/*** {@code 206 Partial Content}.* @see <a href="https://tools.ietf.org/html/rfc7233#section-4.1">HTTP/1.1: Range Requests, section 4.1</a>*/PARTIAL_CONTENT(206, Series.SUCCESSFUL, "Partial Content"),/*** {@code 207 Multi-Status}.* @see <a href="https://tools.ietf.org/html/rfc4918#section-13">WebDAV</a>*/MULTI_STATUS(207, Series.SUCCESSFUL, "Multi-Status"),/*** {@code 208 Already Reported}.* @see <a href="https://tools.ietf.org/html/rfc5842#section-7.1">WebDAV Binding Extensions</a>*/ALREADY_REPORTED(208, Series.SUCCESSFUL, "Already Reported"),/*** {@code 226 IM Used}.* @see <a href="https://tools.ietf.org/html/rfc3229#section-10.4.1">Delta encoding in HTTP</a>*/IM_USED(226, Series.SUCCESSFUL, "IM Used"),// 3xx Redirection/*** {@code 300 Multiple Choices}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.4.1">HTTP/1.1: Semantics and Content, section 6.4.1</a>*/MULTIPLE_CHOICES(300, Series.REDIRECTION, "Multiple Choices"),/*** {@code 301 Moved Permanently}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.4.2">HTTP/1.1: Semantics and Content, section 6.4.2</a>*/MOVED_PERMANENTLY(301, Series.REDIRECTION, "Moved Permanently"),/*** {@code 302 Found}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.4.3">HTTP/1.1: Semantics and Content, section 6.4.3</a>*/FOUND(302, Series.REDIRECTION, "Found"),/*** {@code 302 Moved Temporarily}.* @see <a href="https://tools.ietf.org/html/rfc1945#section-9.3">HTTP/1.0, section 9.3</a>* @deprecated in favor of {@link #FOUND} which will be returned from {@code HttpStatus.valueOf(302)}*/@DeprecatedMOVED_TEMPORARILY(302, Series.REDIRECTION, "Moved Temporarily"),/*** {@code 303 See Other}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.4.4">HTTP/1.1: Semantics and Content, section 6.4.4</a>*/SEE_OTHER(303, Series.REDIRECTION, "See Other"),/*** {@code 304 Not Modified}.* @see <a href="https://tools.ietf.org/html/rfc7232#section-4.1">HTTP/1.1: Conditional Requests, section 4.1</a>*/NOT_MODIFIED(304, Series.REDIRECTION, "Not Modified"),/*** {@code 305 Use Proxy}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.4.5">HTTP/1.1: Semantics and Content, section 6.4.5</a>* @deprecated due to security concerns regarding in-band configuration of a proxy*/@DeprecatedUSE_PROXY(305, Series.REDIRECTION, "Use Proxy"),/*** {@code 307 Temporary Redirect}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.4.7">HTTP/1.1: Semantics and Content, section 6.4.7</a>*/TEMPORARY_REDIRECT(307, Series.REDIRECTION, "Temporary Redirect"),/*** {@code 308 Permanent Redirect}.* @see <a href="https://tools.ietf.org/html/rfc7238">RFC 7238</a>*/PERMANENT_REDIRECT(308, Series.REDIRECTION, "Permanent Redirect"),// --- 4xx Client Error ---/*** {@code 400 Bad Request}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.1">HTTP/1.1: Semantics and Content, section 6.5.1</a>*/BAD_REQUEST(400, Series.CLIENT_ERROR, "Bad Request"),/*** {@code 401 Unauthorized}.* @see <a href="https://tools.ietf.org/html/rfc7235#section-3.1">HTTP/1.1: Authentication, section 3.1</a>*/UNAUTHORIZED(401, Series.CLIENT_ERROR, "Unauthorized"),/*** {@code 402 Payment Required}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.2">HTTP/1.1: Semantics and Content, section 6.5.2</a>*/PAYMENT_REQUIRED(402, Series.CLIENT_ERROR, "Payment Required"),/*** {@code 403 Forbidden}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.3">HTTP/1.1: Semantics and Content, section 6.5.3</a>*/FORBIDDEN(403, Series.CLIENT_ERROR, "Forbidden"),/*** {@code 404 Not Found}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.4">HTTP/1.1: Semantics and Content, section 6.5.4</a>*/NOT_FOUND(404, Series.CLIENT_ERROR, "Not Found"),/*** {@code 405 Method Not Allowed}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.5">HTTP/1.1: Semantics and Content, section 6.5.5</a>*/METHOD_NOT_ALLOWED(405, Series.CLIENT_ERROR, "Method Not Allowed"),/*** {@code 406 Not Acceptable}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.6">HTTP/1.1: Semantics and Content, section 6.5.6</a>*/NOT_ACCEPTABLE(406, Series.CLIENT_ERROR, "Not Acceptable"),/*** {@code 407 Proxy Authentication Required}.* @see <a href="https://tools.ietf.org/html/rfc7235#section-3.2">HTTP/1.1: Authentication, section 3.2</a>*/PROXY_AUTHENTICATION_REQUIRED(407, Series.CLIENT_ERROR, "Proxy Authentication Required"),/*** {@code 408 Request Timeout}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.7">HTTP/1.1: Semantics and Content, section 6.5.7</a>*/REQUEST_TIMEOUT(408, Series.CLIENT_ERROR, "Request Timeout"),/*** {@code 409 Conflict}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.8">HTTP/1.1: Semantics and Content, section 6.5.8</a>*/CONFLICT(409, Series.CLIENT_ERROR, "Conflict"),/*** {@code 410 Gone}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.9">*     HTTP/1.1: Semantics and Content, section 6.5.9</a>*/GONE(410, Series.CLIENT_ERROR, "Gone"),/*** {@code 411 Length Required}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.10">*     HTTP/1.1: Semantics and Content, section 6.5.10</a>*/LENGTH_REQUIRED(411, Series.CLIENT_ERROR, "Length Required"),/*** {@code 412 Precondition failed}.* @see <a href="https://tools.ietf.org/html/rfc7232#section-4.2">*     HTTP/1.1: Conditional Requests, section 4.2</a>*/PRECONDITION_FAILED(412, Series.CLIENT_ERROR, "Precondition Failed"),/*** {@code 413 Payload Too Large}.* @since 4.1* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.11">*     HTTP/1.1: Semantics and Content, section 6.5.11</a>*/PAYLOAD_TOO_LARGE(413, Series.CLIENT_ERROR, "Payload Too Large"),/*** {@code 413 Request Entity Too Large}.* @see <a href="https://tools.ietf.org/html/rfc2616#section-10.4.14">HTTP/1.1, section 10.4.14</a>* @deprecated in favor of {@link #PAYLOAD_TOO_LARGE} which will be* returned from {@code HttpStatus.valueOf(413)}*/@DeprecatedREQUEST_ENTITY_TOO_LARGE(413, Series.CLIENT_ERROR, "Request Entity Too Large"),/*** {@code 414 URI Too Long}.* @since 4.1* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.12">*     HTTP/1.1: Semantics and Content, section 6.5.12</a>*/URI_TOO_LONG(414, Series.CLIENT_ERROR, "URI Too Long"),/*** {@code 414 Request-URI Too Long}.* @see <a href="https://tools.ietf.org/html/rfc2616#section-10.4.15">HTTP/1.1, section 10.4.15</a>* @deprecated in favor of {@link #URI_TOO_LONG} which will be returned from {@code HttpStatus.valueOf(414)}*/@DeprecatedREQUEST_URI_TOO_LONG(414, Series.CLIENT_ERROR, "Request-URI Too Long"),/*** {@code 415 Unsupported Media Type}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.13">*     HTTP/1.1: Semantics and Content, section 6.5.13</a>*/UNSUPPORTED_MEDIA_TYPE(415, Series.CLIENT_ERROR, "Unsupported Media Type"),/*** {@code 416 Requested Range Not Satisfiable}.* @see <a href="https://tools.ietf.org/html/rfc7233#section-4.4">HTTP/1.1: Range Requests, section 4.4</a>*/REQUESTED_RANGE_NOT_SATISFIABLE(416, Series.CLIENT_ERROR, "Requested range not satisfiable"),/*** {@code 417 Expectation Failed}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.5.14">*     HTTP/1.1: Semantics and Content, section 6.5.14</a>*/EXPECTATION_FAILED(417, Series.CLIENT_ERROR, "Expectation Failed"),/*** {@code 418 I'm a teapot}.* @see <a href="https://tools.ietf.org/html/rfc2324#section-2.3.2">HTCPCP/1.0</a>*/I_AM_A_TEAPOT(418, Series.CLIENT_ERROR, "I'm a teapot"),/*** @deprecated See* <a href="https://tools.ietf.org/rfcdiff?difftype=--hwdiff&amp;url2=draft-ietf-webdav-protocol-06.txt">*     WebDAV Draft Changes</a>*/@DeprecatedINSUFFICIENT_SPACE_ON_RESOURCE(419, Series.CLIENT_ERROR, "Insufficient Space On Resource"),/*** @deprecated See* <a href="https://tools.ietf.org/rfcdiff?difftype=--hwdiff&amp;url2=draft-ietf-webdav-protocol-06.txt">*     WebDAV Draft Changes</a>*/@DeprecatedMETHOD_FAILURE(420, Series.CLIENT_ERROR, "Method Failure"),/*** @deprecated* See <a href="https://tools.ietf.org/rfcdiff?difftype=--hwdiff&amp;url2=draft-ietf-webdav-protocol-06.txt">*     WebDAV Draft Changes</a>*/@DeprecatedDESTINATION_LOCKED(421, Series.CLIENT_ERROR, "Destination Locked"),/*** {@code 422 Unprocessable Entity}.* @see <a href="https://tools.ietf.org/html/rfc4918#section-11.2">WebDAV</a>*/UNPROCESSABLE_ENTITY(422, Series.CLIENT_ERROR, "Unprocessable Entity"),/*** {@code 423 Locked}.* @see <a href="https://tools.ietf.org/html/rfc4918#section-11.3">WebDAV</a>*/LOCKED(423, Series.CLIENT_ERROR, "Locked"),/*** {@code 424 Failed Dependency}.* @see <a href="https://tools.ietf.org/html/rfc4918#section-11.4">WebDAV</a>*/FAILED_DEPENDENCY(424, Series.CLIENT_ERROR, "Failed Dependency"),/*** {@code 425 Too Early}.* @since 5.2* @see <a href="https://tools.ietf.org/html/rfc8470">RFC 8470</a>*/TOO_EARLY(425, Series.CLIENT_ERROR, "Too Early"),/*** {@code 426 Upgrade Required}.* @see <a href="https://tools.ietf.org/html/rfc2817#section-6">Upgrading to TLS Within HTTP/1.1</a>*/UPGRADE_REQUIRED(426, Series.CLIENT_ERROR, "Upgrade Required"),/*** {@code 428 Precondition Required}.* @see <a href="https://tools.ietf.org/html/rfc6585#section-3">Additional HTTP Status Codes</a>*/PRECONDITION_REQUIRED(428, Series.CLIENT_ERROR, "Precondition Required"),/*** {@code 429 Too Many Requests}.* @see <a href="https://tools.ietf.org/html/rfc6585#section-4">Additional HTTP Status Codes</a>*/TOO_MANY_REQUESTS(429, Series.CLIENT_ERROR, "Too Many Requests"),/*** {@code 431 Request Header Fields Too Large}.* @see <a href="https://tools.ietf.org/html/rfc6585#section-5">Additional HTTP Status Codes</a>*/REQUEST_HEADER_FIELDS_TOO_LARGE(431, Series.CLIENT_ERROR, "Request Header Fields Too Large"),/*** {@code 451 Unavailable For Legal Reasons}.* @see <a href="https://tools.ietf.org/html/draft-ietf-httpbis-legally-restricted-status-04">* An HTTP Status Code to Report Legal Obstacles</a>* @since 4.3*/UNAVAILABLE_FOR_LEGAL_REASONS(451, Series.CLIENT_ERROR, "Unavailable For Legal Reasons"),// --- 5xx Server Error ---/*** {@code 500 Internal Server Error}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.6.1">HTTP/1.1: Semantics and Content, section 6.6.1</a>*/INTERNAL_SERVER_ERROR(500, Series.SERVER_ERROR, "Internal Server Error"),/*** {@code 501 Not Implemented}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.6.2">HTTP/1.1: Semantics and Content, section 6.6.2</a>*/NOT_IMPLEMENTED(501, Series.SERVER_ERROR, "Not Implemented"),/*** {@code 502 Bad Gateway}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.6.3">HTTP/1.1: Semantics and Content, section 6.6.3</a>*/BAD_GATEWAY(502, Series.SERVER_ERROR, "Bad Gateway"),/*** {@code 503 Service Unavailable}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.6.4">HTTP/1.1: Semantics and Content, section 6.6.4</a>*/SERVICE_UNAVAILABLE(503, Series.SERVER_ERROR, "Service Unavailable"),/*** {@code 504 Gateway Timeout}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.6.5">HTTP/1.1: Semantics and Content, section 6.6.5</a>*/GATEWAY_TIMEOUT(504, Series.SERVER_ERROR, "Gateway Timeout"),/*** {@code 505 HTTP Version Not Supported}.* @see <a href="https://tools.ietf.org/html/rfc7231#section-6.6.6">HTTP/1.1: Semantics and Content, section 6.6.6</a>*/HTTP_VERSION_NOT_SUPPORTED(505, Series.SERVER_ERROR, "HTTP Version not supported"),/*** {@code 506 Variant Also Negotiates}* @see <a href="https://tools.ietf.org/html/rfc2295#section-8.1">Transparent Content Negotiation</a>*/VARIANT_ALSO_NEGOTIATES(506, Series.SERVER_ERROR, "Variant Also Negotiates"),/*** {@code 507 Insufficient Storage}* @see <a href="https://tools.ietf.org/html/rfc4918#section-11.5">WebDAV</a>*/INSUFFICIENT_STORAGE(507, Series.SERVER_ERROR, "Insufficient Storage"),/*** {@code 508 Loop Detected}* @see <a href="https://tools.ietf.org/html/rfc5842#section-7.2">WebDAV Binding Extensions</a>*/LOOP_DETECTED(508, Series.SERVER_ERROR, "Loop Detected"),/*** {@code 509 Bandwidth Limit Exceeded}*/BANDWIDTH_LIMIT_EXCEEDED(509, Series.SERVER_ERROR, "Bandwidth Limit Exceeded"),/*** {@code 510 Not Extended}* @see <a href="https://tools.ietf.org/html/rfc2774#section-7">HTTP Extension Framework</a>*/NOT_EXTENDED(510, Series.SERVER_ERROR, "Not Extended"),/*** {@code 511 Network Authentication Required}.* @see <a href="https://tools.ietf.org/html/rfc6585#section-6">Additional HTTP Status Codes</a>*/NETWORK_AUTHENTICATION_REQUIRED(511, Series.SERVER_ERROR, "Network Authentication Required");private static final HttpStatus[] VALUES;static {VALUES = values();}private final int value;private final Series series;private final String reasonPhrase;HttpStatus(int value, Series series, String reasonPhrase) {this.value = value;this.series = series;this.reasonPhrase = reasonPhrase;}/*** Return the integer value of this status code.*/public int value() {return this.value;}/*** Return the HTTP status series of this status code.* @see HttpStatus.Series*/public Series series() {return this.series;}/*** Return the reason phrase of this status code.*/public String getReasonPhrase() {return this.reasonPhrase;}/*** Whether this status code is in the HTTP series* {@link org.springframework.http.HttpStatus.Series#INFORMATIONAL}.* <p>This is a shortcut for checking the value of {@link #series()}.* @since 4.0* @see #series()*/public boolean is1xxInformational() {return (series() == Series.INFORMATIONAL);}/*** Whether this status code is in the HTTP series* {@link org.springframework.http.HttpStatus.Series#SUCCESSFUL}.* <p>This is a shortcut for checking the value of {@link #series()}.* @since 4.0* @see #series()*/public boolean is2xxSuccessful() {return (series() == Series.SUCCESSFUL);}/*** Whether this status code is in the HTTP series* {@link org.springframework.http.HttpStatus.Series#REDIRECTION}.* <p>This is a shortcut for checking the value of {@link #series()}.* @since 4.0* @see #series()*/public boolean is3xxRedirection() {return (series() == Series.REDIRECTION);}/*** Whether this status code is in the HTTP series* {@link org.springframework.http.HttpStatus.Series#CLIENT_ERROR}.* <p>This is a shortcut for checking the value of {@link #series()}.* @since 4.0* @see #series()*/public boolean is4xxClientError() {return (series() == Series.CLIENT_ERROR);}/*** Whether this status code is in the HTTP series* {@link org.springframework.http.HttpStatus.Series#SERVER_ERROR}.* <p>This is a shortcut for checking the value of {@link #series()}.* @since 4.0* @see #series()*/public boolean is5xxServerError() {return (series() == Series.SERVER_ERROR);}/*** Whether this status code is in the HTTP series* {@link org.springframework.http.HttpStatus.Series#CLIENT_ERROR} or* {@link org.springframework.http.HttpStatus.Series#SERVER_ERROR}.* <p>This is a shortcut for checking the value of {@link #series()}.* @since 5.0* @see #is4xxClientError()* @see #is5xxServerError()*/public boolean isError() {return (is4xxClientError() || is5xxServerError());}/*** Return a string representation of this status code.*/@Overridepublic String toString() {return this.value + " " + name();}/*** Return the {@code HttpStatus} enum constant with the specified numeric value.* @param statusCode the numeric value of the enum to be returned* @return the enum constant with the specified numeric value* @throws IllegalArgumentException if this enum has no constant for the specified numeric value*/public static HttpStatus valueOf(int statusCode) {HttpStatus status = resolve(statusCode);if (status == null) {throw new IllegalArgumentException("No matching constant for [" + statusCode + "]");}return status;}/*** Resolve the given status code to an {@code HttpStatus}, if possible.* @param statusCode the HTTP status code (potentially non-standard)* @return the corresponding {@code HttpStatus}, or {@code null} if not found* @since 5.0*/@Nullablepublic static HttpStatus resolve(int statusCode) {// Use cached VALUES instead of values() to prevent array allocation.for (HttpStatus status : VALUES) {if (status.value == statusCode) {return status;}}return null;}/*** Enumeration of HTTP status series.* <p>Retrievable via {@link HttpStatus#series()}.*/public enum Series {INFORMATIONAL(1),SUCCESSFUL(2),REDIRECTION(3),CLIENT_ERROR(4),SERVER_ERROR(5);private final int value;Series(int value) {this.value = value;}/*** Return the integer value of this status series. Ranges from 1 to 5.*/public int value() {return this.value;}/*** Return the {@code Series} enum constant for the supplied {@code HttpStatus}.* @param status a standard HTTP status enum constant* @return the {@code Series} enum constant for the supplied {@code HttpStatus}* @deprecated as of 5.3, in favor of invoking {@link HttpStatus#series()} directly*/@Deprecatedpublic static Series valueOf(HttpStatus status) {return status.series;}/*** Return the {@code Series} enum constant for the supplied status code.* @param statusCode the HTTP status code (potentially non-standard)* @return the {@code Series} enum constant for the supplied status code* @throws IllegalArgumentException if this enum has no corresponding constant*/public static Series valueOf(int statusCode) {Series series = resolve(statusCode);if (series == null) {throw new IllegalArgumentException("No matching constant for [" + statusCode + "]");}return series;}/*** Resolve the given status code to an {@code HttpStatus.Series}, if possible.* @param statusCode the HTTP status code (potentially non-standard)* @return the corresponding {@code Series}, or {@code null} if not found* @since 5.1.3*/@Nullablepublic static Series resolve(int statusCode) {int seriesCode = statusCode / 100;for (Series series : values()) {if (series.value == seriesCode) {return series;}}return null;}}}

 

 

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