java restful Java RESTful被JSON卡脖子?解析行,计算拉胯,分组汇总全靠硬编码

发布时间:2026/7/30 0:29:55

java restful Java RESTful被JSON卡脖子?解析行,计算拉胯,分组汇总全靠硬编码
从 ES Kafka ... 取到 json 之后JSON可谓是很好的事物, 它能够借由通用的文本形态承载富含的结构化数据之信息。当下诸多技术都热衷于运用JSON当作数据传输格式, 像那样的, 还有Kafka等等, 而这类对性能予以重视在意的技术运用了被二进制化的JSON。结构化的数据常常是批量的也常常是需要再计算的。然而, json 相关这一类的库, 却没什么能方便地进行计算的用处。将 json 解析是不难的, 可就是在计算能力这块儿欠缺不少, 简单的过滤聚合还行得通, 一旦稍微复杂到分组汇总这种情形就不行了, 基本上都是依靠自己来硬编码得以完成的。采用写进数据库去进行计算, 这样的做法, 着实是颇具沉重之感的。况且, 现实情况中json所具备的常常是多层的结构化数据形式, 对于将其写进关系数据库来讲必须要构建几个相互关联的表, 然而入库所需的成本远远超过了计算自身的成本了。SPL 来帮你。SPL 是纯 Java 开发的开源计算引擎在这里 。SPL针对json库做了封装, 只需一句话, 能够将json文本解析成可用于计算的SPL序表, 这SPL序表乃是SPL的内存结构化数据对象:对文件路径为“d:\xml\.json”执行读取操作后得到的内容, 并将其赋值。json(A1)SPL序表有着天然的多层结构, 也就是说, 其字段取值能够是另一个序表, 而这与json有着天然的契合度。一经转变成为 SPL 序表之后, 开展计算这一步骤自身便是其突出的优势所在了。进行过滤操作、实施分组处理、达成连接效果均不在话下, 绝大多数关于计算的目标均能够通过一句话达成:FilterT.select(Amount1000 Amount3000 like(Client,*s*)) SortT.sort(Client,-Amount) DistinctT.id(Client) GroupT.groups(year(OrderDate);sum(Amount)) Joinjoin(T1:O,SellerId; T2:E,EId) TopNT.top(-3;Amount) TopN in groupT.groups(Client;top(3,Amount))这里的这些内容数量是较多的, 在此处便不再予以展开了, 有着兴趣的小伙伴能够前往SPL的官网那里去参考相关的资料。针对很多常见的, 属于json数据源范畴的, 那些访问接口, SPL已然进行了封装。以纯文本形式呈现的json, 完成计算之后, 能够反向生成json文本。(:6868//).read() json(A1)这段内容似乎存在混乱和错误, 不太能按照要求准确改写。请检查并提供正确清晰的内容以便能妥当地进行改写。{ : 1, tags 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