统一结果集的封装

统一返回结果集
1.

查看统一返回结果的信息：一般最少4个

Success   // 是否正确 boolean

Message // 返回的消息

Code // 状态码

Data // 数据的

2.具体步骤

1、 先创建一个枚举，创建返回成功和失败的变量；

2、 创建返回对象类；

a) 建议要有一个OK的方法，error的方法方便调用；

b) 自定义的message，success，code，data的方法

3.枚举类例子如下:

@Getter
public enum  ResultCodeEnum {
    SUCCESS(true, 20000,"成功"),
    UNKNOWN_REASON(false, 20001, "未知错误"),
    BAD_SQL_GRAMMAR(false, 21001, "sql语法错误"),
    JSON_PARSE_ERROR(false, 21002, "json解析异常"),
    PARAM_ERROR(false, 21003, "参数不正确"),
    FILE_UPLOAD_ERROR(false, 21004, "文件上传错误"),
    EXCEL_DATA_IMPORT_ERROR(false, 21005, "Excel数据导入错误");

    private Boolean success;
    private Integer code;
    private String message;
    private ResultCodeEnum(Boolean success, Integer code, String message) {
        this.success = success;
        this.code = code;
        this.message = message;
    }
}

4.统一返回对象类 例子如下:

@Data
@ApiModel(value = "全局统一返回结果")
public class R {

    @ApiModelProperty(value = "是否成功")
    private Boolean success;

    @ApiModelProperty(value = "返回码")
    private Integer code;

    @ApiModelProperty(value = "返回消息")
    private String message;

    @ApiModelProperty(value = "返回数据")
    private Map<String, Object> data = new HashMap<String, Object>();

    private R(){}

    public static R ok(){
        R r = new R();
        r.setSuccess(ResultCodeEnum.SUCCESS.getSuccess());
        r.setCode(ResultCodeEnum.SUCCESS.getCode());
        r.setMessage(ResultCodeEnum.SUCCESS.getMessage());
        return r;
    }

    public static R error(){
        R r = new R();
        r.setSuccess(ResultCodeEnum.UNKNOWN_REASON.getSuccess());
        r.setCode(ResultCodeEnum.UNKNOWN_REASON.getCode());
        r.setMessage(ResultCodeEnum.UNKNOWN_REASON.getMessage());
        return r;
    }
    public static R setResult(ResultCodeEnum resultCodeEnum){
        R r = new R();
        r.setSuccess(resultCodeEnum.getSuccess());
        r.setCode(resultCodeEnum.getCode());
        r.setMessage(resultCodeEnum.getMessage());
        return r;
    }

    public R success(Boolean success){
        this.setSuccess(success);
        return this;
    }

    public R message(String message){
        this.setMessage(message);
        return this;
    }

    public R code(Integer code){
        this.setCode(code);
        return this;
    }

    public R data(String key, Object value){
        this.data.put(key, value);
        return this;
    }

    public R data(Map<String, Object> map){
        this.setData(map);
        return this;
    }
}

5.测试如下:

/*
* 查询方法
* */
@ApiOperation(value = "person1查询数据")
@ResponseBody
@GetMapping("/selectOnePerson/{id}")
public R selectOnePerson(@ApiParam(name="id", value = "personID", required = true) @PathVariable("id") Integer id) {

    try {
       Person person = personServer.selectOne(id);
        return R.ok().data("person",person);
    } catch (Exception e) {
        return R.error();
    }
}