统一后端返回格式

统一后端返回格式

import com.alibaba.fastjson.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.Serializable;

/**
 * 返回结果对象
 *
 * @param <T>
 */
public class Result<T> implements Serializable {
    private static final long serialVersionUID = 5977220693170438629L;
    private static Logger log = LoggerFactory.getLogger(Result.class);
    /**
     * 状态码
     * <table border="1">
     *     <tr>
     *         <th>值</th>
     *         <th>解释</th>
     *     </tr>
     *     <tr>
     *         <td>1</td>
     *         <td>成功</td>
     *     </tr>
     *     <tr>
     *         <td>-1</td>
     *         <td>失败（default），此时尝试访问msg</td>
     *     </tr>
     *     <tr>
     *         <td>0</td>
     *         <td>未按照期望的逻辑执行</td>
     *     </tr>
     *     <tr>
     *         <td>100</td>
     *         <td>会话失效</td>
     *     </tr>
     *     <tr>
     *         <td>1**</td>
     *         <td>sql执行问题，对应SQL执行顺序</td>
     *     </tr>
     *     <tr>
     *         <td>**</td>
     *         <td>待定</td>
     *     </tr>
     * </table>
     *
     */
    private int code;
    /**
     * 提示信息
     */
    private String msg;
    /**
     * 数据
     */
    private T data;



    private Result(int code, String msg, T data) {
        this.code = code;
        this.msg = msg;
        this.data = data;
    }

    public static Result buildResult() {
        return buildResult(-1);
    }

    public static Result buildResult(int code) {
        return buildResult(code, null);
    }

    public static Result buildResult(String msg) {
        return buildResult(-1, msg);
    }

    public static Result buildResult(int code, String msg) {
        return buildResult(code, msg, null);
    }

    public static <T> Result buildResult(T data,int code) {
        return buildResult(code, null, data);
    }

    public static <T> Result buildResult(int code, String msg, T data) {
        return new Result(code, msg, data);
    }

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

    public int getCode() {
        return code;
    }

    public String getMsg() {
        return msg;
    }

    public T getData() {
        return data;
    }
}