Java是否有完整的HTTP响应代码枚举？

Question

我想知道在某个标准Java类库中是否存在枚举类型,它定义了所有有效HTTP响应代码的符号常量.它应该支持转换为/来自相应的整数值.

我正在调试一些使用javax.ws.rs.core.Response.Status的Java代码.它有效,但它只定义了大约一半的有效HTTP响应代码.

Answer 1

我不认为标准Java类中有一个完整的; HttpURLConnection缺少相当多的代码,比如HTTP 100/Continue.尽管如此,Apache Commons中有一个完整的列表:org.apache.http.HttpStatus.

更新: Apache Commons HttpClient已经过时了.有关状态代码列表,请org.apache.commons.HttpClient.HttpStatus在Apache HttpComponents中使用.

Answer 2

接口javax.servlet.http.HttpServletResponse从servlet API具有形式的所有响应代码int常量名SC_<description>.请参阅http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html

Answer 3

好吧,HttpURLConnection类中存在完全整数值的静态常量

Answer 4

如果您正在使用Spring,那么3.x版本可以满足您的需求:http: //static.springsource.org/spring/docs/3.0.x/api/org/springframework/http/HttpStatus.html

Answer 5

这是一个包含状态代码及其描述的枚举（在撰写本文时）对应于HTTP 状态代码注册表。

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);
    }
}

Answer 6

如果您使用的是Netty,则可以使用:

• io.netty.handler.codec.http.HttpResponseStatus

Answer 7

使用javax.servlet.http.HttpServletResponse类

例:

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

Answer 8

每个人似乎都忽略了问题的“枚举类型”部分。

尽管没有HTTP状态代码的规范来源，但是有一种简单的方法可以将所需的任何缺少的Status常量添加到所提供的状态常量中，javax.ws.rs.core.Response.Status而无需在项目中添加任何其他依赖项。

javax.ws.rs.core.Response.Status只是该javax.ws.rs.core.Response.StatusType接口的一种实现。您只需要创建自己的实现枚举以及所需状态代码的定义。

诸如Javax，Jersey等的核心库是写入接口 StatusType而不是实现的 Status（或者应该是）。由于新的Status枚举实现了，StatusType因此可以在任何使用javax.ws.rs.core.Response.Status常量的地方使用它。

只要记住您自己的代码也应该写入StatusType接口即可。这将使您能够同时使用自己的状态代码和“标准”代码。

这是一个具有简单实现方式的要点，该实现带有为“信息1xx”状态码定义的常量：https : //gist.github.com/avendasora/a5ed9acf6b1ee709a14a

Answer 9

1）如果您只有代码，要获取原因文本，您可以使用：

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

httpCode您从 HTTP 响应中获得的原因代码在哪里。

见https://hc.apache.org/httpcomponents-core-ga/httpcore/apidocs/org/apache/http/impl/EnglishReasonPhraseCatalog.html详细信息

2)如果只有文本，要获取原因代码，可以使用BasicHttpResponse.

详情请看这里：https : //hc.apache.org/httpcomponents-core-ga/httpcore/apidocs/org/apache/http/message/BasicHttpResponse.html