RESTFUL 返回结果统一封装

统一结果封装返回结果

**
 * 返回信息
 * @param <T>
 */
public class R<T> implements Serializable {

    /**
     * 状态码
     */
    private int code;

    /**
     * 是否成功
     */
    private boolean success;

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

    /**
     * 承载数据
     */
    private T data;

    public R() { }

    private R(IResultCode resultCode){
        this(resultCode, (T) null,resultCode.getMessage());
    }

    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 <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 code; }

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

    public boolean isSuccess() { return success; }

    public void setSuccess(boolean success) { this.success = success; }

    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; }
}

返回结果枚举

@Getter
@AllArgsConstructor
public enum  ResultCode implements IResultCode {
    /**
     * 操作成功
     */
    SUCCESS(200,"操作成功"),
    /**
     * 业务异常
     */
    FAILURE(400, "业务异常"),
    /**
     * 用户名或密码错误
     */
    ACCOUNT_OR_PASSWORD_INCORRECT(401, "用户名或密码错误"),
    /**
     * 用户未登录
     */
    NOT_LOGIN(401,"用户未登录或登录状态失效,请重新登录"),
    /**
     * 请求未授权
     */
    UN_AUTHORIZED(403, "请求未授权");
    /**
     * 状态码
     */
    final int code;
    /**
     * 返回消息
     */
    final String message;
}

返回枚举接口

public interface IResultCode extends Serializable {
    /**
     * 消息
     */
    String getMessage();
    /**
     * 状态码
     */
    int getCode();
}

原文地址：http://www.cnblogs.com/ldy731729142/p/16794179.html