前言： 

通过sinkTo()的优点：更简洁、类型安全，适用于使用 Flink 提供的预定义 sink 或简单的自定义 sink

准备：

 引入Flink 1.12版本即可

    <dependency><groupId>org.apache.flink</groupId><artifactId>flink-connector-kafka</artifactId><version>3.2.0-1.19</version></dependency><dependency><groupId>org.apache.flink</groupId><artifactId>flink-connector-base</artifactId><version>1.19.1</version></dependency>

创建任务：

package com.iterge.flink.job;import lombok.extern.slf4j.Slf4j;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.api.common.serialization.SimpleStringSchema;
import org.apache.flink.connector.base.DeliveryGuarantee;
import org.apache.flink.connector.kafka.sink.KafkaRecordSerializationSchema;
import org.apache.flink.connector.kafka.sink.KafkaSink;
import org.apache.flink.connector.kafka.source.KafkaSource;
import org.apache.flink.connector.kafka.source.enumerator.initializer.OffsetsInitializer;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;/*** @author iterge* @version 1.0* @date 2024/10/30 16:20* @description kafka to kafka*/@Slf4j
public class KafkaToKafkaDemo {static final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();public static void main(String[] args) throws Exception {KafkaSource<String> source = KafkaSource.<String>builder().setBootstrapServers("localhost:9092").setTopics("it.erge.test.topic").setGroupId("it.erge.test.topic.6").setStartingOffsets(OffsetsInitializer.latest()).setValueOnlyDeserializer(new SimpleStringSchema()).build();DataStreamSource<String> msg = env.fromSource(source, WatermarkStrategy.noWatermarks(), "Kafka Source");//添加sinkKafkaSink<String> build = KafkaSink.<String>builder().setBootstrapServers("localhost:9092").setRecordSerializer(KafkaRecordSerializationSchema.builder().setTopic("it.lph.test.topic").setValueSerializationSchema(new SimpleStringSchema()).build()).setDeliveryGuarantee(DeliveryGuarantee.AT_LEAST_ONCE).build();msg.sinkTo(build);env.execute();}
}