java后台接口统一返回数据类型

为了规范后台开发接口的标准，以及便于前台统一处理接口返回数据，定义一个通用的返回类是必要的。

@ApiModel("统一的返回类型")
public class ResultBean<T> {

    private static String SUCCESS_CODE="0";
    private static String ERROR_CODE="1";
    private static String REFUSED_CODE="2";


    public ResultBean(T data){
        this.data = data;
    }

    /**
     * 执行结果：0成功1失败
     */
    @ApiModelProperty("结果代码：0成功1失败")
    private String code;
    /**
     * 描述（错误原因）
     */
    @ApiModelProperty("失败原因")
    private String message;
    /**
     * 返回对象
     */
    @ApiModelProperty("返回结果的json")
    private T data;

    public  ResultBean success(){
        this.code = SUCCESS_CODE;
        return this;
    }
    public  ResultBean failed(String errorMessage){
        this.data = null;
        this.code = ERROR_CODE;
        this.message = errorMessage;
        return this;
    }
    public  ResultBean refused(){
        this.data = null;
        this.code = REFUSED_CODE;
        return this;
    }
    //getter  and setter
 
}

 Controller层示例

 

    @ApiOperation(value = "查看", notes = "")
    @ResponseBody
    @RequestMapping(value = "/view", method = {RequestMethod.GET})
    public ResultBean<YourBean> view(String id) {
        try {
            return new ResultBean(service.findById(id)).success();
        } catch (Exception e) {
            logger.error("",e);
            return new ResultBean(null).failed(e.getMessage());
        }
    }