|NO.Z.00013|——————————|BigDataEnd|——|Hadoop&kafka.V13|——|kafka.v13|spring_kafka实战.v03|

一、kafkaAutoConfiguration配置；创建新的主题：kafkaAutoConfiguration配置

二、新建主题，可以通过configuration配置

package com.yanqi.kafka.demo.config;

import org.apache.kafka.clients.admin.NewTopic;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.core.KafkaAdmin;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.core.ProducerFactory;

import java.util.HashMap;
import java.util.Map;

@Configuration
public class KafkaConfig {


    private ProducerFactory<Integer, String> producerFactory;

    @Bean
    public NewTopic topic1() {
        return new NewTopic("nptc-01", 3, (short) 1);
    }

    @Bean
    public NewTopic topic2() {
        return new NewTopic("nptc-02", 5, (short) 1);
    }

    @Bean
    public KafkaAdmin kafkaAdmin() {
        Map<String, Object> configs = new HashMap<>();
        configs.put("bootstrap.servers", "node1:9092");
        KafkaAdmin admin = new KafkaAdmin(configs);
        return admin;
    }

    @Bean
    @Autowired
    public KafkaTemplate<Integer, String> kafkaTemplate(ProducerFactory<Integer, String> producerFactory) {
        this.producerFactory = producerFactory;

        // 覆盖ProducerFactory原有设置
        Map<String, Object> configsOverride = new HashMap<>();
        configsOverride.put(ProducerConfig.BATCH_SIZE_CONFIG, 200);

        KafkaTemplate<Integer, String> template = new KafkaTemplate<Integer, String>(
                producerFactory, configsOverride
        );
        return template;
    }

}

三、运行Demo02SpringbootKafkaApplication

### --- 查看运行结果

[root@hadoop ~]# kafka-topics.sh --zookeeper localhost:2181/myKafka --list
__consumer_offsets
nptc-01
nptc-02
topic-spring-01

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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