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# 平常返回数据给前端展示的响应类

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Result<T> {
    private int code;
    private String message;
    private T data;
    public Result(T data) {
        this.code = 200;
        this.message = "success";
        this.data = data;
    }
    public Result(T data, boolean success, String message) {
        if (success) {
            this.code = 200;
            this.message = "success";
        } else {
            this.code = 500;
            this.message = message;
        }
        this.data = data;
    }
    public Result(int code, String message) {
        this.code = code;
        this.message = message;
        this.data = null;
    }
    public static <T> Result<T> success(T data) {
        return new Result<>(data);
    }
    public static <T> Result<T> fail(String message) {
        return new Result<>(500, message);
    }
    public static <T> Result<T> fail(int code, String message) {
        return new Result<>(code, message);
    }
}
# 分页响应类
@Data
@ToString
public class PageResult<T> implements Serializable {
    // 数据列表
    private List<T> items;
    // 总记录数
    private long counts;
    // 当前页码
    private long page;
    // 每页记录数
    private long pageSize;
    public PageResult(List<T> items, long counts, long page, long pageSize) {
        this.items = items;
        this.counts = counts;
        this.page = page;
        this.pageSize = pageSize;
    }
}
分页接收参数类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class PageParams {
    // 当前页码
    private long pageNo;
    // 每页显示记录数
    private long pageSize = Integer.MAX_VALUE;
}