在HttpURLConnection类中有精确整数值的静态常量

我认为在标准Java类中没有一个是完整的;HttpURLConnection缺少相当多的代码，如HTTP 100/Continue。

在Apache HttpComponents中有一个完整的列表: org.apache.http.HttpStatus(替换了Apache HttpClient中的org.apache.commons.HttpClient.HttpStatus，该状态已达到生命周期结束)

来自servlet API的接口javax.servlet.http.HttpServletResponse具有int常量名称SC_<description>形式的所有响应代码。参见http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html

还可以查看Restlet Status类:

http://www.restlet.org/documentation/1.1/api/org/restlet/data/Status.html

如果您正在使用Spring，则3。X版本有你想要的: http://static.springsource.org/spring/docs/3.0.x/api/org/springframework/http/HttpStatus.html

使用javax.servlet.http.HttpServletResponse类

例子:

javax.servlet.http.HttpServletResponse.SC_UNAUTHORIZED //401
javax.servlet.http.HttpServletResponse.SC_INTERNAL_SERVER_ERROR //500

http状态码常量的最佳提供者可能是Jetty的org.eclipse.jetty.http.HttpStatus类，因为:

在maven中有一个javadoc包，如果你搜索常数，只知道数字>，这很重要，只需打开API文档页面并搜索数字 常量包含状态码数字本身。

我唯一需要改进的是:将状态代码放在文本描述的前面，以便在开始编写代码时更方便地进行自动完成查找。

另一种选择是使用Apache common -httpclient中的HttpStatus类，它会将各种Http状态作为常量提供给你。

如果你正在使用Netty，你可以使用:

io.netty.handler.codec.http.HttpResponseStatus

每个人似乎都忽略了你问题中的“枚举类型”部分。

虽然HTTP状态码没有规范的源代码，但有一种简单的方法可以将任何缺少的状态常量添加到javax.ws.rs.core.Response.Status提供的状态常量中，而无需向项目添加任何额外的依赖项。

status只是javax.ws.rs.core.Response.StatusType接口的一个实现。您只需要创建自己的实现枚举，其中包含所需的Status Codes的定义。

核心库如Javax、Jersey等被写入接口的StatusType，而不是实现的Status(或者它们当然应该是)。因为你的新状态枚举实现了statusstype，它可以在任何你使用javax.ws.rs.core.Response.Status常量的地方使用。

只需记住，您自己的代码也应该写入StatusType接口。这将使您能够使用您自己的状态代码以及“标准”状态代码。

以下是一个简单实现的要点，其中包含为“Informational 1xx”状态代码定义的常量:https://gist.github.com/avendasora/a5ed9acf6b1ee709a14a

1)如果你只有代码，你可以使用:

org.apache.http.impl.EnglishReasonPhraseCatalog.INSTANCE.getReason(httpCode,null)

httpCode是你从HTTP响应中得到的原因代码。

详情见https://hc.apache.org/httpcomponents-core-ga/httpcore/apidocs/org/apache/http/impl/EnglishReasonPhraseCatalog.html

2)如果你只有文本，你可以使用BasicHttpResponse来获取原因代码。

详情见这里:https://hc.apache.org/httpcomponents-core-ga/httpcore/apidocs/org/apache/http/message/BasicHttpResponse.html

这里是一个包含状态码及其描述的枚举，(在编写时)对应于HTTP状态码注册表。

请注意，注册表可能会更新，并且有时会使用非官方的状态代码。

public enum HttpStatusCode {

    //1xx: Informational
    CONTINUE(100, "Continue"),
    SWITCHING_PROTOCOLS(101, "Switching Protocols"),
    PROCESSING(102, "Processing"),
    EARLY_HINTS(103, "Early Hints"),

    //2xx: Success
    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"),

    //3xx: Redirection
    MULTIPLE_CHOICES(300, "Multiple Choice"),
    MOVED_PERMANENTLY(301, "Moved Permanently"),
    FOUND(302, "Found"),
    SEE_OTHER(303, "See Other"),
    NOT_MODIFIED(304, "Not Modified"),
    USE_PROXY(305, "Use Proxy"),
    TEMPORARY_REDIRECT(307, "Temporary Redirect"),
    PERMANENT_REDIRECT(308, "Permanent Redirect"),

    //4xx: Client Error
    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"),
    REQUEST_TOO_LONG(413, "Payload Too Large"),
    REQUEST_URI_TOO_LONG(414, "URI Too Long"),
    UNSUPPORTED_MEDIA_TYPE(415, "Unsupported Media Type"),
    REQUESTED_RANGE_NOT_SATISFIABLE(416, "Range Not Satisfiable"),
    EXPECTATION_FAILED(417, "Expectation Failed"),
    MISDIRECTED_REQUEST(421, "Misdirected Request"),
    UNPROCESSABLE_ENTITY(422, "Unprocessable Entity"),
    LOCKED(423, "Locked"),
    FAILED_DEPENDENCY(424, "Failed Dependency"),
    TOO_EARLY(425, "Too Early"),
    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"),

    //5xx: Server Error
    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"),
    NOT_EXTENDED(510, "Not Extended"),
    NETWORK_AUTHENTICATION_REQUIRED(511, "Network Authentication Required");

    private final int value;
    private final String description;

    HttpStatusCode(int value, String description) {
        this.value = value;
        this.description = description;
    }

    public int getValue() {
        return value;
    }

    public String getDescription() {
        return description;
    }

    @Override
    public String toString() {
        return value + " " + description;
    }

    public static HttpStatusCode getByValue(int value) {
        for(HttpStatusCode status : values()) {
            if(status.value == value) return status;
        }
        throw new IllegalArgumentException("Invalid status code: " + value);
    }
}

请看下面Spring框架中的枚举，它提供了所有HTTP响应状态代码

HttpStatus价值观()。