Question

我在SO和其他有类似问题的地方看过很多链接，但没有任何帮助。

这是我的代码：

import java.util.Queue;
import java.util.LinkedList;

import javax.xml.bind.DatatypeConverter;

import org.json.simple.JSONObject;

import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;


public class ConsumerThread implements Runnable {

    private KafkaStream<byte[], byte[]> stream;

    public static Queue<JSONObject> message = (Queue<JSONObject>) new LinkedList<JSONObject>();

    public ConsumerThread(KafkaStream<byte[], byte[]> stream){
        this.stream = stream;
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        ConsumerIterator<byte[], byte[]> it = stream.iterator();
        while (it.hasNext()){
            byte[] msg = it.next().message();
            System.out.println(new String(msg));
            message.add(DatatypeConverter.printBase64Binary(msg));
        }
    }

}

这在最后一行给出错误：

message.add

我只想将此byte[]转换为可以推送到队列的JSONObject，我不确定是什么问题。

Answer 1

怎么样

import java.util.Queue;
import java.util.LinkedList;

import javax.xml.bind.DatatypeConverter;

import org.json.simple.JSONObject;

import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;


public class ConsumerThread implements Runnable {

    public static final String JSON_MESSAGE_FIELD_NAME = "message_b64";

    private KafkaStream<byte[], byte[]> stream;

    public static Queue<JSONObject> message = (Queue<JSONObject>) new LinkedList<JSONObject>();

    public ConsumerThread(KafkaStream<byte[], byte[]> stream){
        this.stream = stream;
    }

    @Override
    public void run() {

        ConsumerIterator<byte[], byte[]> it = stream.iterator();
        while (it.hasNext()){
            byte[] msg = it.next().message();
            System.out.println(new String(msg));

            final JSONObject json = new JSONObject();
            json.put(JSON_MESSAGE_FIELD_NAME, DatatypeConverter.printBase64Binary(msg)); 

            message.add(json);
        }
    }

}

将byte []转换为JSONObject java

1 个答案: