Java HTTP状态码字典类实现指南
作为一名经验丰富的开发者，我很高兴能帮助你实现一个Java HTTP状态码字典类。这个类将用于存储和查询HTTP状态码及其描述。以下是实现这个类的详细步骤和代码示例。
步骤概览
以下是实现HTTP状态码字典类的步骤：
| 步骤 | 描述 |
|---|---|
| 1 | 创建一个枚举类表示HTTP状态码 |
| 2 | 在枚举类中定义状态码和描述 |
| 3 | 创建一个字典类用于存储和查询状态码 |
| 4 | 实现查询功能 |
步骤详解
步骤1：创建一个枚举类表示HTTP状态码
首先，我们需要创建一个枚举类来表示HTTP状态码。枚举类是一种特殊的类，它只能包含有限的常量。
public enum HttpStatus {
CONTINUE(100, "Continue"),
SWITCHING_PROTOCOLS(101, "Switching Protocols"),
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"),
MULTIPLE_CHOICES(300, "Multiple Choices"),
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"),
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"),
URI_TOO_LONG(414, "URI Too Long"),
UNSUPPORTED_MEDIA_TYPE(415, "Unsupported Media Type"),
RANGE_NOT_SATISFIABLE(416, "Range Not Satisfiable"),
EXPECTATION_FAILED(417, "Expectation Failed"),
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");
private int code;
private String description;
HttpStatus(int code, String description) {
this.code = code;
this.description = description;
}
public int getCode() {
return code;
}
public String getDescription() {
return description;
}
}
步骤2：在枚举类中定义状态码和描述
在枚举类中，我们定义了每个HTTP状态码及其描述。每个枚举实例都有一个构造函数，用于初始化状态码和描述。
步骤3：创建一个字典类用于存储和查询状态码
接下来，我们需要创建一个字典类来存储和查询HTTP状态码。我们可以使用HashMap来实现这个功能。
import java.util.HashMap;
import java.util.Map;
public class HttpStatusDictionary {
private Map<Integer, String> statusMap;
public HttpStatusDictionary() {
statusMap = new HashMap<>();
for (HttpStatus status : HttpStatus.values()) {
statusMap.put(status.getCode(), status.getDescription());
}
}
public String getDescription(int statusCode) {
return statusMap.get(statusCode);
}
}
步骤4：实现查询功能
在字典类中，我们实现了一个getDescription方法，用于根据状态码查询其描述。
状态图
以下是HTTP状态码的分类状态图：
stateDiagram-v2
[*] --> 1xx: Informational
[*] --> 2xx: Success
[*] --> 3xx: Redirection
[*] --> 4xx: Client Error
[*] --> 5xx: Server Error
1xx --> CONTINUE: 100
1xx --> SWITCHING_PROTOCOLS: 101
2xx --> OK: 200
