A data structure can be converted to a JSON string byserde_json::to_string. There is alsoserde_json::to_vecwhich serializes to aVec<u8>andserde_json::to_writerwhich serializes to anyio::Writesuch as a File or a TCP stream.
Hi guys, I am using serde_json to deserialize a JSON file into a struct, MyStruct use std::{io::BufReader, fs::File}; use serde::Deserialize; use num_bigint::BigInt; #[derive(Deserialize, Debug)] struct MyStruct { num: BigInt, } fn main() { let file = File::open("...
func main() { file, err := os.Open("data.json") if err != nil { fmt.Println("无法打开JSON文件:", err) return } defer file.Close() decoder := json.NewDecoder(file) var person Person err = decoder.Decode(&person) if err != nil { fmt.Println("解码JSON失败:", err) return }...
languagesarray<string>, religions map<string,array<int>>)ROWFORMATSERDE'org.openx.data.jsonserde.JsonSerDe'STOREDASTEXTFILE;LOADDATALOCALINPATH'/home/xiaosi/a.txt'OVERWRITEINTOTABLEtmp_json_nested ; 使用: hive>select*fromtmp_json_nested; OK Switzerland["German","French","Italian"]{"catholic"...
另外，还完成了最基本的 handlebars 模板开发，这是 Rust web 开发的骨架工作。本篇文章中，我们请求 ...
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent! [INFO] Compiling 8 source files to /root/github/cloudera/hive-json-schema/target/classes [INFO] [INFO] --- maven-resources-plugin:2.5:testResources (default-testResources) @ json-hi...
CREATETABLEjson_table(idINT,name STRING,ageINT)ROWFORMAT SERDE'org.apache.hadoop.hive.serde2.JsonSerDe'STOREDASTEXTFILE; 1. 2. 3. 4. 5. 6. 7. 在上面的示例中,我们创建了一个名为json_table的Hive表,包含了id、name和age三个列,并指定了存储格式为JsonSerDe。
将下载好的jar包上传到hive的lib目录下 创建表 create table employees(name string,salary int) " row format serde 'org.openx.data.jsonserde.JsonSerDe' stored as textfile; 1. 数据 {"name":"zs","salary":12} 1. 加载 hive (default)> load data local inpath '/opt/test/test.json' overwri...
写入HDFS字节序列,或者其他系统能识别的流文件 ~~~ Deserilize把字符串或者二进制流转换成Hive能识别的java object对象 ~~~ Read : HDFS files => InputFileFormat => <key, value> => Deserializer => Row object ~~~ Write : Row object => Seriallizer => <key, value> => OutputFileFormat => ...
<property><name>hive.aux.jars.path</name><value>file:///home/amal/hive/udf1.jar,file:///usr/lib/hive/lib/hive-hbase-handler.jar</value></property> 如果你使用的cloudera CDH ,那么你可以直接在 hiveserver2 的 configuration 里面直接找到这个配置项 ...