flinkcdc读取mysql数据转换成JSONObject的java代码
时间: 2023-09-21 22:03:23 浏览: 145
以下是一个简单的示例代码,可以使用flinkcdc读取MySQL数据并将其转换为JSONObject。
```java
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.common.serialization.SimpleStringSchema;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;
import org.json.JSONObject;
import java.util.Properties;
public class FlinkCDCMySQLToJSON {
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
Properties properties = new Properties();
properties.setProperty("bootstrap.servers", "localhost:9092");
properties.setProperty("group.id", "test");
FlinkKafkaConsumer<String> kafkaConsumer = new FlinkKafkaConsumer<>("mysql-cdc-topic", new SimpleStringSchema(), properties);
DataStream<String> stream = env.addSource(kafkaConsumer);
DataStream<JSONObject> jsonStream = stream.map(new MapFunction<String, JSONObject>() {
@Override
public JSONObject map(String value) throws Exception {
String[] columns = value.split(",");
JSONObject obj = new JSONObject();
obj.put("id", columns[0]);
obj.put("name", columns[1]);
obj.put("age", columns[2]);
return obj;
}
});
jsonStream.print();
env.execute("Flink CDC MySQL to JSON");
}
}
```
在这个示例中,我们使用了Flink CDC从MySQL中读取数据,并将其转换为JSONObject。我们使用了Flink Kafka消费者将数据读取到Flink流中,并使用MapFunction将每行数据转换为JSONObject。最后,我们将JSONObject打印到控制台。
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