php网站开发实例教程第七章怎样制作网站教程

JDBCWrite组件

组件说明

使用JDBC驱动向任意类型的关系型数据库写入数据。

计算引擎

flink

有界性

Sink: Batch

Sink: Streaming Append & Upsert Mode

组件分组

Jdbc

端口

Inport：默认端口

outport：默认端口

组件属性

名称	展示名称	默认值	允许值	是否必填	描述	例子
url	Url	“”	无	是	JDBC数据库url。	jdbc:mysql://127.0.0.1:3306/dbname
driver	Driver	“”	无	否	用于连接到此URL的JDBC驱动类名，如果不设置，将自动从URL中推导。	com.mysql.cj.jdbc.Driver
username	Username	“”	无	否	JDBC用户名。如果指定了username和password中的任一参数，则两者必须都被指定。	root
password	Password	“”	无	否	JDBC密码。	123456
tableName	DBTable	“”	无	是	连接到JDBC表的名称。	test
connectionMaxRetryTimeout	ConnectionMaxRetryTimeout	60s	无	否	最大重试超时时间，以秒为单位且不应该小于 1 秒。	60s
tableDefinition	TableDefinition	“”	无	是	Flink table定义。
properties	PROPERTIES	“”	无	否	连接器其他配置。

JDBCWrite示例配置

{"flow": {"name": "JDBCWriteTest","uuid": "1234","stops": [{"uuid": "0000","name": "JDBCExecuteSql1","bundle": "cn.piflow.bundle.flink.jdbc.JDBCExecuteSql","properties": {"url": "jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false&allowMultiQueries=true","username": "root","password": "123456","driver": "com.mysql.cj.jdbc.Driver","sql": "CREATE TABLE IF NOT EXISTS `test` (`id` int DEFAULT NULL,`name` varchar(20) DEFAULT NULL,`age` int DEFAULT NULL);"}},{"uuid": "1111","name": "DataGen1","bundle": "cn.piflow.bundle.flink.common.DataGen","properties": {"schema": "[{\"filedName\":\"id\",\"filedType\":\"INT\",\"kind\":\"sequence\",\"start\":1,\"end\":10000},{\"filedName\":\"name\",\"filedType\":\"STRING\",\"kind\":\"random\",\"length\":15},{\"filedName\":\"age\",\"filedType\":\"INT\",\"kind\":\"random\",\"max\":100,\"min\":1}]","count": "100","ratio": "50"}},{"uuid": "2222","name": "JDBCWrite1","bundle": "cn.piflow.bundle.flink.jdbc.JDBCWrite","properties": {"url": "jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false&allowMultiQueries=true","username": "root","password": "123456","tableName": "test","tableDefinition": "{\"catalogName\":null,\"dbname\":null,\"tableName\":\"\",\"ifNotExists\":true,\"physicalColumnDefinition\":[{\"columnName\":\"id\",\"columnType\":\"INT\",\"comment\":\"id\"},{\"columnName\":\"name\",\"columnType\":\"STRING\",\"comment\":\"name\"},{\"columnName\":\"age\",\"columnType\":\"INT\"}],\"metadataColumnDefinition\":null,\"computedColumnDefinition\":null,\"watermarkDefinition\":null}","properties": "{}"}},{"uuid": "3333","name": "JDBCRead1","bundle": "cn.piflow.bundle.flink.jdbc.JDBCRead","properties": {"url": "jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false&allowMultiQueries=true","username": "root","password": "123456","tableName": "test","tableDefinition": "{\"catalogName\":null,\"dbname\":null,\"tableName\":\"\",\"ifNotExists\":true,\"physicalColumnDefinition\":[{\"columnName\":\"id\",\"columnType\":\"INT\",\"comment\":\"id\"},{\"columnName\":\"name\",\"columnType\":\"STRING\",\"comment\":\"name\"},{\"columnName\":\"age\",\"columnType\":\"INT\"}],\"metadataColumnDefinition\":null,\"computedColumnDefinition\":null,\"watermarkDefinition\":null}","properties": "{}"}},{"uuid": "4444","name": "ShowData1","bundle": "cn.piflow.bundle.flink.common.ShowData","properties": {"showNumber": "100"}}],"paths": [{"from": "JDBCExecuteSql1","outport": "","inport": "","to": "DataGen1"},{"from": "DataGen1","outport": "","inport": "","to": "JDBCWrite1"},{"from": "JDBCWrite1","outport": "","inport": "","to": "JDBCRead1"},{"from": "JDBCRead1","outport": "","inport": "","to": "ShowData1"}]}
}

示例说明

1. 首先使用JDBCExecuteSql组件执行建表DDL语句，往数据库添加表；

2. 使用DataGen组件生成100条测试数据；

3. 使用JDBCWrite组件将测试数据写入到数据库；

4. 验证写入的结果，使用JDBCRead组件读取数据，并使用ShowData组件将结果打印在控制台。

演示DEMO