Java flink 创建表
时间: 2023-07-22 20:08:33 浏览: 68
在Java中使用Flink创建表可以通过Flink的Table API或者SQL API来实现。下面是使用Table API创建表的示例代码:
```java
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.table.api.EnvironmentSettings;
import org.apache.flink.table.api.Table;
import org.apache.flink.table.api.TableEnvironment;
import org.apache.flink.table.api.bridge.java.BatchTableEnvironment;
public class FlinkTableCreationExample {
public static void main(String[] args) throws Exception {
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
BatchTableEnvironment tEnv = BatchTableEnvironment.create(env, EnvironmentSettings.newInstance().useBlinkPlanner().inBatchMode().build());
String createTableQuery = "CREATE TABLE myTable (\n" +
" id INT,\n" +
" name STRING,\n" +
" age INT\n" +
") WITH (\n" +
" 'connector.type' = 'filesystem',\n" +
" 'connector.path' = 'path/to/data',\n" +
" 'format.type' = 'csv'\n" +
")";
tEnv.executeSql(createTableQuery);
Table table = tEnv.from("myTable");
table.printSchema();
}
}
```
上述代码中,首先创建了一个ExecutionEnvironment和BatchTableEnvironment,然后使用SQL语句创建了一个名为`myTable`的表,该表包含id、name和age三个字段。接下来,可以使用`table.printSchema()`方法打印表结构信息。在实际应用中,可以根据需求选择不同的数据源和格式来创建表。