Question

我收到数据：

public void accept(PartitionReceiver receiver)
{
    System.out.println("** Created receiver on partition " + partitionId);
    try {
        while (true) {
            Iterable<EventData> receivedEvents = receiver.receive(10).get();
            int batchSize = 0;
            if (receivedEvents != null)
            {
                for(EventData receivedEvent: receivedEvents)
                {                                    
                    System.out.println(String.format("| Time: %s", receivedEvent.getSystemProperties().getEnqueuedTime()));
                    System.out.println(String.format("| Device ID: %s", receivedEvent.getProperties().get("iothub-connection-device-id")));
                    System.out.println(String.format("| Message Payload: %s", new String(receivedEvent.getBody(), Charset.defaultCharset())));
                    batchSize++;
                }
            }
        }
    } catch (Exception e)
    {
        System.out.println("Failed to receive messages: " + e.getMessage());
    }
}

在这里，我成为产品名称和价格：

System.out.println(String.format("| Message Payload: %s", new String(receivedEvent.getBody(), Charset.defaultCharset())));

如何将Payload产品转换为String产品;和价格成双倍价格;？

Answer 1

正如@Aravind所说，你可以定义一个POJO类来将数据打包为对象属性，如Payload，并序列化＆amp;使用某些json库（例如jackson，fastjson）将数据反序列化为POJO和json字符串之间的事件正文，或者从http://www.json.org/中选择一个最喜欢的数据。

Answer 2

彼得潘和阿拉文德帮我解决了这个问题。

以下是问题的解决方案：

BankAccount

这里我从类产品中读取了一个对象中的JSON字符串，Product类包含带有getter的变量，product和price。它有效！

public class Product {
public Product(){

}
    private String product;
    private Double price;

public Product(String json ){
    Gson gson=new Gson();
    try{
        Product product =gson.fromJson(json, Product.class);
        if (product!=null){
            System.out.println("Name: " +product.getProduct());
        }
    }catch (Exception e){
        System.out.println("failed: " +e.getMessage());
    }
}

    public String getProduct() {
        return product;
    }

    public Double getPrice() {
        return price;
    }
 }

如何使用Azure IoT Hub收到的DATA

2 个答案: