统一返回类R

常量类

public class Constants {

    /**
     * UTF-8 字符集
     */
    public static final String UTF8 = "UTF-8";

    /**
     * GBK 字符集
     */
    public static final String GBK = "GBK";

    /**
     * http请求
     */
    public static final String HTTP = "http://";

    /**
     * https请求
     */
    public static final String HTTPS = "https://";

    /**
     * 成功标记
     */
    public static final Integer SUCCESS = 200;

    /**
     * 失败标记
     */
    public static final Integer FAIL = 500;


    /**
     * 验证码 redis key
     */
    public static final String CAPTCHA_CODE_KEY = "captcha_codes:";

    /**
     * 验证码有效期（分钟）
     */
    public static final long CAPTCHA_EXPIRATION = 2;

}

返回类R

/**
 * 公共的返回值对象
 * @author c
 * @create: 2021-05-18 16:53
 *  @param <T>
 */
public class R<T> implements Serializable {

    private static final long serialVersionUID = 1L;

    /**
     * 成功
     */
    public static final int SUCCESS = Constants.SUCCESS;

    /**
     * 失败
     */
    public static final int FAIL = Constants.FAIL;

    private int code;

    private String msg;

    private T data;

    public static <T> R<T> ok() {
        return restResult(null, SUCCESS, null);
    }

    public static <T> R<T> ok(T data) {
        return restResult(data, SUCCESS, null);
    }

    public static <T> R<T> ok(T data, String msg) {
        return restResult(data, SUCCESS, msg);
    }

    public static <T> R<T> fail() {
        return restResult(null, FAIL, null);
    }

    public static <T> R<T> fail(String msg) {
        return restResult(null, FAIL, msg);
    }

    public static <T> R<T> fail(T data) {
        return restResult(data, FAIL, null);
    }

    public static <T> R<T> fail(T data, String msg) {
        return restResult(data, FAIL, msg);
    }

    public static <T> R<T> fail(int code, String msg) {
        return restResult(null, code, msg);
    }

    private static <T> R<T> restResult(T data, int code, String msg) {
        R<T> apiResult = new R<>();
        apiResult.setCode(code);
        apiResult.setData(data);
        apiResult.setMsg(msg);
        return apiResult;
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }

    public static R<String> rest(boolean flag,String successMsg,String failMsg){
        if (flag){
            return ok(successMsg);
        }
        return fail(failMsg);
    }
}