项目中用到，比较好用！！

用户前端与后台的交互数据，这个封装类中包含分页、数据、错误码、状态码等信息！！

亲测好用哦！

一个类DataWrapper

public class DataWrapper<T>{
    private CallStatusEnum callStatus;
    private ErrorCodeEnum errorCode;
    private T data;
    private int numberPerPage; // 用于分页结果
    private int currentPage;
    private int totalNumber;
    private int totalPage;
    private String message ;
    private String recordUpdateTime ; //redis数据插入时间

    public DataWrapper() {
        callStatus = CallStatusEnum.SUCCEED;
        errorCode = ErrorCodeEnum.No_Error;
    }

    public static <T> DataWrapper<T> createInstance(){
        return new DataWrapper<T>() ;
    }

    public CallStatusEnum getCallStatus() {
        return callStatus;
    }

    public DataWrapper<T> setCallStatus(CallStatusEnum callStatus) {
        this.callStatus = callStatus;
        return this ;
    }

    public ErrorCodeEnum getErrorCode() {
        return errorCode;
    }

    public void setErrorCode(ErrorCodeEnum errorCode) {
        this.errorCode = errorCode;
        if (!errorCode.equals(ErrorCodeEnum.No_Error)) {
            this.callStatus = CallStatusEnum.FAILED;
        }
    }

    public T getData() {
        return data;
    }

    public DataWrapper<T> setData(T data) {
        this.data = data;
        return this ;
    }

    public int getNumberPerPage() {
        return numberPerPage;
    }

    public void setNumberPerPage(int numberPerPage) {
        this.numberPerPage = numberPerPage;
    }

    public int getCurrentPage() {
        return currentPage;
    }

    public void setCurrentPage(int currentPage) {
        this.currentPage = currentPage;
    }

    public int getTotalNumber() {
        return totalNumber;
    }

    public void setTotalNumber(int totalNumber) {
        this.totalNumber = totalNumber;
    }

    public int getTotalPage() {
        return totalPage;
    }

    public void setTotalPage(int totalPage) {
        this.totalPage = totalPage;
    }

    public String getMessage() {
        return message;
    }

    public DataWrapper<T> setMessage(String message) {
        this.message = message;
        return this ;
    }

    public String getRecordUpdateTime() {
        return recordUpdateTime;
    }

    public DataWrapper<T>  setRecordUpdateTime(String recordUpdateTime) {
        this.recordUpdateTime = recordUpdateTime;
        return this ;
    }

    @Override
    public String toString() {
        return  JSONObject.toJSONString(this) ;
    }
}

两个枚举CallStatusEnum、ErrorCodeEnum

public enum CallStatusEnum implements Serializable {
    SUCCEED,
    FAILED,;

    CallStatusEnum() {
    }
}

public enum ErrorCodeEnum implements Serializable {
    No_Error("No ERROE!", 0),
    Error("Unknown error!", 1),
    NO_SUCH_USER("Can't find username",2),
    IncorrectCredentials("IncorrectCredentialsException",3),
    LoginFailed("AuthenticationException",4),
    USER_EXIST("User already exist in db",5),
    PASSWORD_ERROR("Error is password",6),
    REGISTER_FAILED("Register failed",7),
    PARSE_DATE("Parse  Date error",8),
    ExcessiveAttempts("Try password more than 5 times",9) ,
    NO_ROLE("User has no role!" , 10) ,
    USER_STATE_ERROR("User state error! Disable Login" , 11),
    USER_IDENTITY_ERROR("User Identity error! Disable Login" , 12),
    DB_ERROR("database maybe error!" , 13) ,
    WEB_SP_ERROR("from webSp maybe error!" , 14) ,
    MFA_VERIFY_ERROR("mfa verify random code error!" , 15) ,
    MFA_SEND_ERROR("mfa send random code error!" , 16) ,
    MFA_SEND_EXCESSIVE("ask send random code excessive!" , 17),
    PHONE_NUMBER_ERROR("phone number is empty or error!" , 18),
    IMAGECODE_ERROR("image code error" , 19),
    VERIFYCODE_ERROR("telephone verify code incorrect",20);

    private String label;
    private Integer code;

    ErrorCodeEnum() {
    }

    ErrorCodeEnum(String label, Integer code) {
        this.label = label;
        this.code = code;
    }

    public String getLabel() {
        return label;
    }

    public void setLabel(String label) {
        this.label = label;
    }

    public int getCode() {
        return code;
    }

    @Override
    public String toString() {
        return code.toString();
    }

    public static ErrorCodeEnum parse(int code) {
        for (ErrorCodeEnum theEnum : ErrorCodeEnum.values()) {
            if (theEnum.getCode() == code) {
                return theEnum;
            }
        }
        return No_Error;
    }
}