Java通用返回结果类

1. Result类：用于后台返回给前台的结果

public class Result {

    // 结果状态码
    private Integer code;
    // 结果消息
    private String msg;
    // 结果数据
    private Object data;
 
    public Result() {
        super();
    }
 
    public Result(Integer code, String msg, Object data) {
        this.code = code;
        this.msg = msg;
        this.data = data;
    }
    
    /**
     * 根据状态码枚举设置状态码和状态信息的值
     * @param code 状态码枚举
     */
    public void setResultCode(ResultCode code) {
        this.code = code.getCode();
        this.msg = code.getMessage();
    }
 
    public Integer getCode() {
        return code;
    }
 
    public void setCode(Integer code) {
        this.code = code;
    }
 
    public String getMsg() {
        return msg;
    }
 
    public void setMsg(String msg) {
        this.msg = msg;
    }
 
    public Object getData() {
        return data;
    }
 
    public void setData(Object data) {
        this.data = data;
    }
 
    @Override
    public String toString() {
        return "Result{" +
                "code=" + this.code +
                ", msg='" + this.msg + '\'' +
                ", data=" + this.data +
              '}';
    }
}

2. ResultCode类：结果状态枚举

public enum ResultCode {

    SUCCESS(10001, "成功"),
    FAILURE(10002, "失败"),
    UNKNOWN_ERROR(10003, "未知错误"),
    SYSTEM_INNER_ERROR(10004, "系统繁忙，请稍后重试"),
    PARAM_VALIDATE_SUCCESS(10005, "参数校验成功"),

    /* 参数错误：20001-29999 */
    PARAM_IS_INVALID(20001, "参数无效"),
    PARAM_IS_BLANK(20002, "参数为空"),
    PARAM_TYPE_BIND_ERROR(20003, "参数类型错误"),
    PARAM_NOT_COMPLETE(20004, "参数缺失");

    // 结果状态码
    private Integer code;

    // 结果消息
    private String message;

    ResultCode(Integer code, String message) {
        this.code = code;
        this.message = message;
    }

    public Integer getCode() {
        return code;
    }

    public String getMessage() {
        return message;
    }
}

3. ResultUtil类：返回结果工具类

public class ResultUtil {
    
    /**
     * 成功无返回数据
     * @return
     */
    public static Result success() {
        Result result = new Result();
        result.setResultCode(ResultCode.SUCCESS);
        return result;
    }
    
    /**
     * 成功带返回数据
     * @param data 响应数据
     * @return
     */
    public static Result success(Object data) {
        Result result = new Result();
        result.setResultCode(ResultCode.SUCCESS);
        result.setData(data);
        return result;
    } 
    
    /**
     * 自定义状态码并带返回数据
     * @param code 结果状态码
     * @param data 响应数据
     * @return
     */
    public static Result success(ResultCode code, Object data) {
        Result result = new Result();
        result.setResultCode(code);
        result.setData(data);
        return result;
    }
    
    /**
     * 失败不带返回数据
     * @return
     */
    public static Result failure() {
        Result result = new Result();
        result.setResultCode(ResultCode.FAILURE);
        return result;
    }
    
    /**
     * 失败带返回数据
     * @param data 响应数据
     * @return
     */
    public static Result failure(Object data) {
        Result result = new Result();
        result.setResultCode(ResultCode.FAILURE);
        result.setData(data);
        return result;
    }
}