Spring统一返回Json工具类，带分页信息

前言：

项目做前后端分离时，我们会经常提供Json数据给前端，如果有一个统一的Json格式返回工具类，那么将大大提高开发效率和减低沟通成本。
此Json响应工具类，支持带分页信息，支持泛型，支持HttpStatus标准返回码

效果预览：

步入正题：

1. Resp工具类

import java.io.Serializable;
import java.util.Map;

/**
 * @Author: Seifon
 * @Description: Restful统一Json响应对象封装
 * @Date: Created in 9:39 2018/4/10
 */
public class Resp<T> implements Serializable {
    private static final long serialVersionUID = 1L;

    private final static String SUCCESS_CODE = "200";

    /**
     * 返回状态码
     */
    private String status;

    /**
     * 返回消息
     */
    private String message;

    /**
     * 返回内容
     */
    private T data;

    /**
     * 分页信息
     */
    private PageInfo page;

    /**
     * 其他内容
     */
    private Map<String, Object> ext;

    public String getStatus() {
        return status; } public void setStatus(String status) { this.status = status; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public T getData() { return data; } public void setData(T data) { this.data = data; } public Map<String, Object> getExt() { return ext; } public void setExt(Map<String, Object> ext) { this.ext = ext; } public PageInfo getPage() { return page; } public void setPage(PageInfo page) { this.page = page; } public Resp(){ this.status = SUCCESS_CODE; this.message = "SUCCESS"; } public Resp(String status, String message) { this.status = status; this.message = message; } public Resp(String status, String message, T data) { this.status = status; this.message = message; this.data = data; } public Resp(String status, String message, T data, Map<String, Object> ext) { this.status = status; this.message = message; this.data = data; this.ext = ext; } public Resp(String status, String message, T data, PageInfo pageInfo) { this.status = status; this.message = message; this.data = data; this.page = pageInfo; } public Resp(String status, String message, T data, Map<String, Object> ext, PageInfo pageInfo) { this.status = status; this.message = message; this.data = data; this.ext = ext; this.page = pageInfo; } public Resp(String status, String message, T data, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); this.status = status; this.message = message; this.data = data; this.page = pageInfo; } public Resp(String status, String message, T data, Map<String, Object> ext, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); this.status = status; this.message = message; this.data = data; this.ext = ext; this.page = pageInfo; } //快速返回成功 public static <T>Resp success(){ return new Resp<T>(SUCCESS_CODE,"请求成功",null); } public static <T>Resp success(T result){ return new Resp<T>(SUCCESS_CODE,"请求成功",result); } public static <T>Resp success(String message, T result){ return new Resp<T>(SUCCESS_CODE,message,result); } public static <T>Resp success(String message, T result, Map<String, Object> extra){ return new Resp<T>(SUCCESS_CODE,message,result, extra); } public static <T>Resp success(T result, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); return new Resp<T>(SUCCESS_CODE,"请求成功",result, pageInfo); } public static <T>Resp success(T result, Map<String, Object> extra, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); return new Resp<T>(SUCCESS_CODE,"请求成功",result, extra,pageInfo); } public static <T>Resp success(String message, T result, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); return new Resp<T>(SUCCESS_CODE,message,result,pageInfo); } public static <T>Resp success(String message, T result, Map<String, Object> extra, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); return new Resp<T>(SUCCESS_CODE,message,result, extra,pageInfo); } //快速返回失败状态 public static <T>Resp fail(){ return new Resp<T>(ErrorCode.SYSTEM_ERROR.getCode(),ErrorCode.SYSTEM_ERROR.getMessage()); } public static <T>Resp fail(T result){ return new Resp<T>(ErrorCode.SYSTEM_ERROR.getCode(),ErrorCode.SYSTEM_ERROR.getMessage(),result); } public <T>Resp fail(String message, T result){ return new Resp<T>(ErrorCode.SYSTEM_ERROR.getCode(),message,result); } public <T>Resp fail(String message, T result, Map<String, Object> extra){ return new Resp<T>(ErrorCode.SYSTEM_ERROR.getCode(),message,result, extra); } public static <T>Resp fail(ErrorCode errorCode){ return new Resp<T>(errorCode.getCode(),errorCode.getMessage()); } public static <T>Resp fail(ErrorCode errorCode, T result){ return new Resp<T>(errorCode.getCode(),errorCode.getMessage(),result); } public static <T>Resp fail(ErrorCode errorCode, String message, T result){ return new Resp<T>(errorCode.getCode(),message,result); } public static <T>Resp fail(ErrorCode errorCode, String message, T result, Map<String, Object> extra){ return new Resp<T>(errorCode.getCode(),message,result, extra); } //快速返回自定义状态码 public static <T>Resp result(String statusCode, String message){ return new Resp<T>(statusCode,message); } public static <T>Resp result(String statusCode, String message, T result){ return new Resp<T>(statusCode,message,result); } public static <T>Resp result(String statusCode, String message, T result, Map<String, Object> extra){ return new Resp<T>(statusCode,message,result, extra); } public static <T>Resp result(String statusCode, String message, T result, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); return new Resp<T>(statusCode,message,result, pageInfo); } public static <T>Resp result(String statusCode, String message, T result, Map<String, Object> extra, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); return new Resp<T>(statusCode,message,result, extra,pageInfo); } //快速返回Http状态 public static <T>Resp httpStatus(HttpStatus httpStatus, String message){ return result(httpStatus.toString(),message); } public static <T>Resp httpStatus(HttpStatus httpStatus, String message, T result){ return result(httpStatus.toString(),message,result); } public static <T>Resp httpStatus(HttpStatus httpStatus, String message, T result, Map<String, Object> extra){ return result(httpStatus.toString(),message,result, extra); } public static <T>Resp httpStatus(HttpStatus httpStatus, String message, T result, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); return result(httpStatus.toString(),message,result, total, pageNo, pageSize); } public static <T>Resp httpStatus(HttpStatus httpStatus, String message, T result, Map<String, Object> extra, Long total, Integer pageNo, Integer pageSize){ PageInfo pageInfo = new PageInfo(total, pageNo, pageSize); return result(httpStatus.toString(),message,result, extra, total, pageNo, pageSize); } }

2. PageInfo 用于封装分页信息的

import java.io.Serializable;

/**
 * @Author: Seifon
 * @Description: 分页信息
 * @Date: Created in 9:39 2018/4/10
 */
public class PageInfo implements Serializable{


	private static final long serialVersionUID = 1L;
	/**
	 * 总记录数
	 */
	private Long total;
	/**
	 * 总页数
	 */
	private Long totalPages;
	/**
	 * 当前页
	 */
	private Integer pageNo;
	/**
	 * 页记录数
	 */
	private Integer pageSize;

	public PageInfo(Long total) {
		this.total = total;
	}

	public PageInfo(Long total, Integer pageNo,
                    Integer pageSize) {
		this.total = total;
		this.totalPages = (total - 1) / pageSize + 1;
		this.pageNo = pageNo;
		this.pageSize = pageSize;
	}

	public static PageInfo page(Long total) {
		return new PageInfo(total);
	}

	public static PageInfo page( Long total, Integer pageNo,
                                      Integer pageSize) {
		return new PageInfo(total, pageNo, pageSize);
	}

	public Long getTotal() { return total; } public void setTotal(Long total) { this.total = total; } public Long getTotalPages() { return totalPages; } public void setTotalPages(Long totalPages) { this.totalPages = totalPages; } public Integer getPageNo() { return pageNo; } public void setPageNo(Integer pageNo) { this.pageNo = pageNo; } public Integer getPageSize() { return pageSize; } public void setPageSize(Integer pageSize) { this.pageSize = pageSize; } }

4. ErrorCode 用于定义错误码

/**
 * @Author: Seifon
 * @Description: 错误码
 * @Date: Created in 9:39 2018/4/10
 */
public enum ErrorCode {

	SYSTEM_ERROR(500, "系统错误"),
	PARAMETER_CHECK_ERROR(400, "参数校验错误"),
    AUTH_VALID_ERROR(701, "用户权限不足"),
    UNLOGIN_ERROR(401, "用户未登录或登录状态超时失效"), ; private final Integer value; private final String message; ErrorCode(int value, String message) { this.value = value; this.message = message; } public int getValue() { return value; } public String getMessage() { return message; } @Override public String toString() { return value.toString(); } public String getCode() { return value.toString(); } public static ErrorCode getByCode(Integer value) { for (ErrorCode _enum : values()) { if (_enum.getValue() == value) { return _enum; } } return null; } }

5. HttpStatus 提取自org.springframework.http,可以自己引入

/**
 * 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="http://www.iana.org/assignments/http-status-codes">HTTP Status Code Registry</a>
 * @see <a href="http://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="http://tools.ietf.org/html/rfc7231#section-6.2.1">HTTP/1.1: Semantics and Content, section 6.2.1</a>
	 */
	CONTINUE(100, "Continue"), /** * {@code 101 Switching Protocols}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.2.2">HTTP/1.1: Semantics and Content, section 6.2.2</a> */ SWITCHING_PROTOCOLS(101, "Switching Protocols"), /** * {@code 102 Processing}. * @see <a href="http://tools.ietf.org/html/rfc2518#section-10.1">WebDAV</a> */ PROCESSING(102, "Processing"), /** * {@code 103 Checkpoint}. * @see <a href="http://code.google.com/p/gears/wiki/ResumableHttpRequestsProposal">A proposal for supporting * resumable POST/PUT HTTP requests in HTTP/1.0</a> */ CHECKPOINT(103, "Checkpoint"), // 2xx Success /** * {@code 200 OK}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.1">HTTP/1.1: Semantics and Content, section 6.3.1</a> */ OK(200, "OK"), /** * {@code 201 Created}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.2">HTTP/1.1: Semantics and Content, section 6.3.2</a> */ CREATED(201, "Created"), /** * {@code 202 Accepted}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.3">HTTP/1.1: Semantics and Content, section 6.3.3</a> */ ACCEPTED(202, "Accepted"), /** * {@code 203 Non-Authoritative Information}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.4">HTTP/1.1: Semantics and Content, section 6.3.4</a> */ NON_AUTHORITATIVE_INFORMATION(203, "Non-Authoritative Information"), /** * {@code 204 No Content}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.5">HTTP/1.1: Semantics and Content, section 6.3.5</a> */ NO_CONTENT(204, "No Content"), /** * {@code 205 Reset Content}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.6">HTTP/1.1: Semantics and Content, section 6.3.6</a> */ RESET_CONTENT(205, "Reset Content"), /** * {@code 206 Partial Content}. * @see <a href="http://tools.ietf.org/html/rfc7233#section-4.1">HTTP/1.1: Range Requests, section 4.1</a> */ PARTIAL_CONTENT(206, "Partial Content"), /** * {@code 207 Multi-Status}. * @see <a href="http://tools.ietf.org/html/rfc4918#section-13">WebDAV</a> */ MULTI_STATUS(207, "Multi-Status"), /** * {@code 208 Already Reported}. * @see <a href="http://tools.ietf.org/html/rfc5842#section-7.1">WebDAV Binding Extensions</a> */ ALREADY_REPORTED(208, "Already Reported"), /** * {@code 226 IM Used}. * @see <a href="http://tools.ietf.org/html/rfc3229#section-10.4.1">Delta encoding in HTTP</a> */ IM_USED(226, "IM Used"), // 3xx Redirection /** * {@code 300 Multiple Choices}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.1">HTTP/1.1: Semantics and Content, section 6.4.1</a> */ MULTIPLE_CHOICES(300, "Multiple Choices"), /** * {@code 301 Moved Permanently}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.2">HTTP/1.1: Semantics and Content, section 6.4.2</a> */ MOVED_PERMANENTLY(301, "Moved Permanently"), /** * {@code 302 Found}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.3">HTTP/1.1: Semantics and Content, section 6.4.3</a> */ FOUND(302, "Found"), /** * {@code 302 Moved Temporarily}. * @see <a href="http://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)} */ @Deprecated MOVED_TEMPORARILY(302, "Moved Temporarily"), /** * {@code 303 See Other}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.4">HTTP/1.1: Semantics and Content, section 6.4.4</a> */ SEE_OTHER(303, "See Other"), /** * {@code 304 Not Modified}. * @see <a href="http://tools.ietf.org/html/rfc7232#section-4.1">HTTP/1.1: Conditional Requests, section 4.1</a> */ NOT_MODIFIED(304, "Not Modified"), /** * {@code 305 Use Proxy}. * @see <a href="http://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 */ @Deprecated USE_PROXY(305, "Use Proxy"), /** * {@code 307 Temporary Redirect}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.7">HTTP/1.1: Semantics and Content, section 6.4.7</a> */ TEMPORARY_REDIRECT(307, "Temporary Redirect"), /** * {@code 308 Permanent Redirect}. * @see <a href="http://tools.ietf.org/html/rfc7238">RFC 7238</a> */ PERMANENT_REDIRECT(308, "Permanent Redirect"), // --- 4xx Client Error --- /** * {@code 400 Bad Request}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.1">HTTP/1.1: Semantics and Content, section 6.5.1</a> */ BAD_REQUEST(400, "Bad Request"), /** * {@code 401 Unauthorized}. * @see <a href="http://tools.ietf.org/html/rfc7235#section-3.1">HTTP/1.1: Authentication, section 3.1</a> */ UNAUTHORIZED(401, "Unauthorized"), /** * {@code 402 Payment Required}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.2">HTTP/1.1: Semantics and Content, section 6.5.2</a> */ PAYMENT_REQUIRED(402, "Payment Required"), /** * {@code 403 Forbidden}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.3">HTTP/1.1: Semantics and Content, section 6.5.3</a> */ FORBIDDEN(403, "Forbidden"), /** * {@code 404 Not Found}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.4">HTTP/1.1: Semantics and Content, section 6.5.4</a> */ NOT_FOUND(404, "Not Found"), /** * {@code 405 Method Not Allowed}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.5">HTTP/1.1: Semantics and Content, section 6.5.5</a> */ METHOD_NOT_ALLOWED(405, "Method Not Allowed"), /** * {@code 406 Not Acceptable}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.6">HTTP/1.1: Semantics and Content, section 6.5.6</a> */ NOT_ACCEPTABLE(406, "Not Acceptable"), /** * {@code 407 Proxy Authentication Required}. * @see <a href="http://tools.ietf.org/html/rfc7235#section-3.2">HTTP/1.1: Authentication, section 3.2</a> */ PROXY_AUTHENTICATION_REQUIRED(407, "Proxy Authentication Required"), /** * {@code 408 Request Timeout}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.7">HTTP/1.1: Semantics and Content, section 6.5.7</a> */ REQUEST_TIMEOUT(408, "Request Timeout"), /** * {@code 409 Conflict}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.8">HTTP/1.1: Semantics and Content, section 6.5.8</a> */ CONFLICT(409, "Conflict"), /** * {@code 410 Gone}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.9">HTTP/1.1: Semantics and Content, section 6.5.9</a> */ GONE(410, "Gone"), /** * {@code 411 Length Required}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.10">HTTP/1.1: Semantics and Content, section 6.5.10</a> */ LENGTH_REQUIRED(411, "Length Required"), /** * {@code 412 Precondition failed}. * @see <a href="http://tools.ietf.org/html/rfc7232#section-4.2">HTTP/1.1: Conditional Requests, section 4.2</a> */ PRECONDITION_FAILED(412, "Precondition Failed"), /** * {@code 413 Payload Too Large}. * @since 4.1 * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.11">HTTP/1.1: Semantics and Content, section 6.5.11</a> */ PAYLOAD_TOO_LARGE(413, "Payload Too Large"), /** * {@code 413 Request Entity Too Large}. * @see <a href="http://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)} */ @Deprecated REQUEST_ENTITY_TOO_LARGE(413, "Request Entity Too Large"), /** * {@code 414 URI Too Long}. * @since 4.1 * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.12">HTTP/1.1: Semantics and Content, section 6.5.12</a> */ URI_TOO_LONG(414, "URI Too Long"), /** * {@code 414 Request-URI Too Long}. * @see <a href="http://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)} */ @Deprecated REQUEST_URI_TOO_LONG(414, "Request-URI Too Long"), /** * {@code 415 Unsupported Media Type}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.13">HTTP/1.1: Semantics and Content, section 6.5.13</a> */ UNSUPPORTED_MEDIA_TYPE(415, "Unsupported Media Type"), /** * {@code 416 Requested Range Not Satisfiable}. * @see <a href="http://tools.ietf.org/html/rfc7233#section-4.4">HTTP/1.1: Range Requests, section 4.4</a> */ REQUESTED_RANGE_NOT_SATISFIABLE(416, "Requested range not satisfiable"), /** * {@code 417 Expectation Failed}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.14">HTTP/1.1: Semantics and Content, section 6.5.14</a> */ EXPECTATION_FAILED(417, "Expectation Failed"), /** * {@code 418 I'm a teapot}. * @see <a href="http://tools.ietf.org/html/rfc2324#section-2.3.2">HTCPCP/1.0</a> */ I_AM_A_TEAPOT(418, "I'm a teapot"), /** * @deprecated See <a href="http://tools.ietf.org/rfcdiff?difftype=--hwdiff&url2=draft-ietf-webdav-protocol-06.txt">WebDAV Draft Changes</a> */ @Deprecated INSUFFICIENT_SPACE_ON_RESOURCE(419, "Insufficient Space On Resource"), /** * @deprecated See <a href="http://tools.ietf.org/rfcdiff?difftype=--hwdiff&url2=draft-ietf-webdav-protocol-06.txt">WebDAV Draft Changes</a> */ @Deprecated METHOD_FAILURE(420, "Method Failure"), /** * @deprecated See <a href="http://tools.ietf.org/rfcdiff?difftype=--hwdiff&url2=draft-ietf-webdav-protocol-06.txt">WebDAV Draft Changes</a> */ @Deprecated DESTINATION_LOCKED(421, "Destination Locked"), /** * {@code 422 Unprocessable Entity}. * @see <a href="http://tools.ietf.org/html/rfc4918#section-11.2">WebDAV</a> */ UNPROCESSABLE_ENTITY(422, "Unprocessable Entity"), /** * {@code 423 Locked}. * @see <a href="http://tools.ietf.org/html/rfc4918#section-11.3">WebDAV</a> */ LOCKED(423, "Locked"), /** * {@code 424 Failed Dependency}. * @see <a href="http://tools.ietf.org/html/rfc4918#section-11.4">WebDAV</a> */ FAILED_DEPENDENCY(424, "Failed Dependency"), /** * {@code 426 Upgrade Required}. * @see <a href="http://tools.ietf.org/html/rfc2817#section-6">Upgrading to TLS Within HTTP/1.1</a> */ UPGRADE_REQUIRED(426, "Upgrade Required"), /** * {@code 428 Precondition Required}. * @see <a href="http://tools.ietf.org/html/rfc6585#section-3">Additional HTTP Status Codes</a> */ PRECONDITION_REQUIRED(428, "Precondition Required"), /** * {@code 429 Too Many Requests}. * @see <a href="http://tools.ietf.org/html/rfc6585#section-4">Additional HTTP Status Codes</a> */ TOO_MANY_REQUESTS(429, "Too Many Requests"), /** * {@code 431 Request Header Fields Too Large}. * @see <a href="http://tools.ietf.org/html/rfc6585#section-5">Additional HTTP Status Codes</a> */ REQUEST_HEADER_FIELDS_TOO_LARGE(431, "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, "Unavailable For Legal Reasons"), // --- 5xx Server Error --- /** * {@code 500 Internal Server Error}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.1">HTTP/1.1: Semantics and Content, section 6.6.1</a> */ INTERNAL_SERVER_ERROR(500, "Internal Server Error"), /** * {@code 501 Not Implemented}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.2">HTTP/1.1: Semantics and Content, section 6.6.2</a> */ NOT_IMPLEMENTED(501, "Not Implemented"), /** * {@code 502 Bad Gateway}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.3">HTTP/1.1: Semantics and Content, section 6.6.3</a> */ BAD_GATEWAY(502, "Bad Gateway"), /** * {@code 503 Service Unavailable}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.4">HTTP/1.1: Semantics and Content, section 6.6.4</a> */ SERVICE_UNAVAILABLE(503, "Service Unavailable"), /** * {@code 504 Gateway Timeout}. * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.5">HTTP/1.1: Semantics and Content, section 6.6.5</a> */ GATEWAY_TIMEOUT(504, "Gateway Timeout"), /** * {@code 505 HTTP Version Not Supported}. * @see <a href="http://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, "HTTP Version not supported"), /** * {@code 506 Variant Also Negotiates} * @see <a href="http://tools.ietf.org/html/rfc2295#section-8.1">Transparent Content Negotiation</a> */ VARIANT_ALSO_NEGOTIATES(506, "Variant Also Negotiates"), /** * {@code 507 Insufficient Storage} * @see <a href="http://tools.ietf.org/html/rfc4918#section-11.5">WebDAV</a> */ INSUFFICIENT_STORAGE(507, "Insufficient Storage"), /** * {@code 508 Loop Detected} * @see <a href="http://tools.ietf.org/html/rfc5842#section-7.2">WebDAV Binding Extensions</a> */ LOOP_DETECTED(508, "Loop Detected"), /** * {@code 509 Bandwidth Limit Exceeded} */ BANDWIDTH_LIMIT_EXCEEDED(509, "Bandwidth Limit Exceeded"), /** * {@code 510 Not Extended} * @see <a href="http://tools.ietf.org/html/rfc2774#section-7">HTTP Extension Framework</a> */ NOT_EXTENDED(510, "Not Extended"), /** * {@code 511 Network Authentication Required}. * @see <a href="http://tools.ietf.org/html/rfc6585#section-6">Additional HTTP Status Codes</a> */ NETWORK_AUTHENTICATION_REQUIRED(511, "Network Authentication Required"); private final int value; private final String reasonPhrase; HttpStatus(int value, String reasonPhrase) { this.value = value; this.reasonPhrase = reasonPhrase; } /** * Return the integer value of this status code. */ public int value() { return this.value; } /** * 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}. * This is a shortcut for checking the value of {@link #series()}. */ public boolean is1xxInformational() { return Series.INFORMATIONAL.equals(series()); } /** * Whether this status code is in the HTTP series * {@link org.springframework.http.HttpStatus.Series#SUCCESSFUL}. * This is a shortcut for checking the value of {@link #series()}. */ public boolean is2xxSuccessful() { return Series.SUCCESSFUL.equals(series()); } /** * Whether this status code is in the HTTP series * {@link org.springframework.http.HttpStatus.Series#REDIRECTION}. * This is a shortcut for checking the value of {@link #series()}. */ public boolean is3xxRedirection() { return Series.REDIRECTION.equals(series()); } /** * Whether this status code is in the HTTP series * {@link org.springframework.http.HttpStatus.Series#CLIENT_ERROR}. * This is a shortcut for checking the value of {@link #series()}. */ public boolean is4xxClientError() { return Series.CLIENT_ERROR.equals(series()); } /** * Whether this status code is in the HTTP series * {@link org.springframework.http.HttpStatus.Series#SERVER_ERROR}. * This is a shortcut for checking the value of {@link #series()}. */ public boolean is5xxServerError() { return Series.SERVER_ERROR.equals(series()); } /** * Returns the HTTP status series of this status code. * @see HttpStatus.Series */ public Series series() { return Series.valueOf(this); } /** * Return a string representation of this status code. */ @Override public String toString() { return Integer.toString(this.value); } /** * Return the enum constant of this type 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) { for (HttpStatus status : values()) { if (status.value == statusCode) { return status; } } throw new IllegalArgumentException("No matching constant for [" + statusCode + "]"); } /** * 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; } public static Series valueOf(int status) { int seriesCode = status / 100; for (Series series : values()) { if (series.value == seriesCode) { return series; } } throw new IllegalArgumentException("No matching constant for [" + status + "]"); } public static Series valueOf(HttpStatus status) { return valueOf(status.value); } } }

6. 测试示例：


    @ResponseBody
    @RequestMapping("/json")
    public Resp json(String token) {
        MemberDetails member = memberService.getMemberDetailsByToken(token);
        return Resp.success(member, 5L, 1, 3); //这里分页信息，请自己从PageHelper返回的数据中得到。参看下面注释内容：

        //Page<Object> page = PageHelper.startPage(1, 5);
        //MemberDetails member = memberService.getMemberDetailsByToken(token);
        //return Resp.success(member, page.getTotal(), page.getPageNum(), page.getPageSize());
    }

    @ResponseBody
    @RequestMapping("/json2")
    public Resp json2(String token) {
        MemberDetails member = memberService.getMemberDetailsByToken(token);
        Map<String, Object> ext = new HashMap<>();
        ext.put("msg", "扩展内容"); return Resp.success("成功了", member, ext, 5L, 1, 3); } @ResponseBody @RequestMapping("/json3") public Resp json3(String token) { MemberDetails member = memberService.getMemberDetailsByToken(token); return Resp.fail(); } @ResponseBody @RequestMapping("/json4") public Resp json4(String token) { MemberDetails member = memberService.getMemberDetailsByToken(token); Map<String, Object> ext = new HashMap<>(); ext.put("msg", "扩展内容"); return Resp.result("201", "成功了", member); } @ResponseBody @RequestMapping("/json5") public Resp json5(String token) { MemberDetails member = memberService.getMemberDetailsByToken(token); return Resp.success(member); } @ResponseBody @RequestMapping("/json6") public Resp json6(String token) { MemberDetails member = memberService.getMemberDetailsByToken(token); return Resp.httpStatus(HttpStatus.ACCEPTED, "成功了"); }