这一篇主要是介绍如何写kafka的prodecer代码
照着我人生导师的代码照猫画虎来的～

public class TestProducer extends Thread{
    private final KafkaProducer<String, String> producer;
    private final Boolean isAsync;

    public TestProducer(String topic,Boolean isAsync) {
        String[] str = topic.split(",");
        Properties properties = new Properties();
        properties.put("bootstrap.servers", "host:port");
        properties.put("client.id","testProducer");
        properties.put("key.serializer","org.apache.kafka.common.serialization.IntegerSerializer");
        properties.put("value.serializer","org.apache.kafka.common.serialization.StringSerializer");

        producer = new KafkaProducer<String, String>(properties);       
        this.isAsync = isAsync;
    }

    public void run() {
        File file = new File("/path/to/file");  // 要分词的文件所在的位置
        BufferedReader reader = null;
        try{
            reader = new BufferedReader(new FileReader(file));
            String tempString = null;
            int line=1;
            while((tempString = reader.readLine())!= null){
                producer.send(new ProducerRecord<String, String>("topic50",line+"---"+tempString));//topic注意改成你自己的topic
                System.out.println("Success send [" +line+ "] message..");
                line++;
            }
            reader.close();
            System.out.println("Total send [" +line+ "] message..");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(reader !=null)
            {
                try{
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        producer.close();

    }
}

/**
*main函数
**/
public class Main {
    public static void main(String[] args) {
        TestProducer test = new TestProducer("topic50", false);
        test.start();
    }
}