【java】使用springMVC优雅的响应数据

 1.抽象接口

import java.io.Serializable;

public interface IResultCode extends Serializable {String getMessage(); int getCode(); 
}

2. 利用枚举类实现接口创建对象

public enum ResultCode implements IResultCode {SUCCESS(200, "操作成功"),FAILURE(400, "业务异常"),UN_AUTHORIZED(401, "请求未授权"),NOT_FOUND(404, "404 没找到请求"),MSG_NOT_READABLE(400, "消息不能读取"),METHOD_NOT_SUPPORTED(405, "不支持当前请求方法"),MEDIA_TYPE_NOT_SUPPORTED(415, "不支持当前媒体类型"),REQ_REJECT(403, "请求被拒绝"),INTERNAL_SERVER_ERROR(500, "服务器异常"),PARAM_MISS(400, "缺少必要的请求参数"),PARAM_TYPE_ERROR(400, "请求参数类型错误"),PARAM_BIND_ERROR(400, "请求参数绑定错误"),PARAM_VALID_ERROR(400, "参数校验失败");final int code;final String message;public int getCode() {return this.code;}public String getMessage() {return this.message;}private ResultCode(final int code, final String message) {this.code = code;this.message = message;}
}

 

3.响应类

import java.io.Serializable;
import java.util.Optional;@ApiModel(description = "返回信息"
)
public class R<T> implements Serializable {private static final long serialVersionUID = 1L;@ApiModelProperty(value = "状态码",required = true)private int code;@ApiModelProperty(value = "是否成功",required = true)private boolean success;@ApiModelProperty("承载数据")private T data;@ApiModelProperty(value = "返回消息",required = true)private String msg;private R(IResultCode resultCode) {this(resultCode, null, resultCode.getMessage());}private R(IResultCode resultCode, String msg) {this(resultCode, null, msg);}private R(IResultCode resultCode, T data) {this(resultCode, data, resultCode.getMessage());}private R(IResultCode resultCode, T data, String msg) {this(resultCode.getCode(), data, msg);}private R(int code, T data, String msg) {this.code = code;this.data = data;this.msg = msg;this.success = ResultCode.SUCCESS.code == code;}public static boolean isSuccess(@Nullable R<?> result) {return (Boolean)Optional.ofNullable(result).map((x) -> {return ObjectUtils.nullSafeEquals(ResultCode.SUCCESS.code, x.code);}).orElse(Boolean.FALSE);}public static boolean isNotSuccess(@Nullable R<?> result) {return !isSuccess(result);}public static <T> R<T> data(T data) {return data(data, "操作成功");}public static <T> R<T> data(T data, String msg) {return data(200, data, msg);}public static <T> R<T> data(int code, T data, String msg) {return new R(code, data, data == null ? "暂无承载数据" : msg);}public static <T> R<T> success(String msg) {return new R(ResultCode.SUCCESS, msg);}public static <T> R<T> success(IResultCode resultCode) {return new R(resultCode);}public static <T> R<T> success(IResultCode resultCode, String msg) {return new R(resultCode, msg);}public static <T> R<T> fail(String msg) {return new R(ResultCode.FAILURE, msg);}public static <T> R<T> fail(int code, String msg) {return new R(code, (Object)null, msg);}public static <T> R<T> fail(IResultCode resultCode) {return new R(resultCode);}public static <T> R<T> fail(IResultCode resultCode, String msg) {return new R(resultCode, msg);}public static <T> R<T> status(boolean flag) {return flag ? success("操作成功") : fail("操作失败");}public int getCode() {return this.code;}public boolean isSuccess() {return this.success;}public T getData() {return this.data;}public String getMsg() {return this.msg;}public void setCode(final int code) {this.code = code;}public void setSuccess(final boolean success) {this.success = success;}public void setData(final T data) {this.data = data;}public void setMsg(final String msg) {this.msg = msg;}public String toString() {return "R(code=" + this.getCode() + ", success=" + this.isSuccess() + ", data=" + this.getData() + ", msg=" + this.getMsg() + ")";}public R() {}
}