如何从jsondata中获取key的值

Question

{
"Records": [{
    "messageId": "20ea364e-3bc107b5c78c",
    "receiptHandle": "AQEB6DhNloFS4R66c=",
    "body": "1",
    "attributes": {
        "ApproximateReceiveCount": "1",
        "SentTimestamp": "15393506",
        "SenderId": "AROAJMTI6NE:errorLog",
        "ApproximateFirstReceiveTimestamp": "15393511"
    },
    "messageAttributes": {},
    "md5OfBody": "c4ca75849b",
    "eventSource": "aws:sqs",
    "eventSourceARN": "arn:aws:sqs:ap-suth-1:83362:escalateErrorStandardQueue",
    "awsRegion": "ap-south-1"
}]

}

我想获取键 "body" 的值，预期输出应该是：1

Answer 1

如果 jsondata 的名称是 data（比方说）：

data.Records[0].body

Answer 2

var data={
"Records": [{
    "messageId": "20ea364e-3bc107b5c78c",
    "receiptHandle": "AQEB6DhNloFS4R66c=",
    "body": "1",
    "attributes": {
        "ApproximateReceiveCount": "1",
        "SentTimestamp": "15393506",
        "SenderId": "AROAJMTI6NE:errorLog",
        "ApproximateFirstReceiveTimestamp": "15393511"
    },
    "messageAttributes": {},
    "md5OfBody": "c4ca75849b",
    "eventSource": "aws:sqs",
    "eventSourceARN": "arn:aws:sqs:ap-suth-1:83362:escalateErrorStandardQueue",
    "awsRegion": "ap-south-1"
}]
};
console.log(data.Records[0].body);

您只需data.Records[0].body即可访问数据。

Answer 3

试试这个：

(data && data['Records'] && data['Records'][0] && data['Records'][0]['body']) || 1;

它永远不会给你任何错误和 return key 'body' value if exist otherwise 1.

Answer 4

如果您的记录是一个数组，您可以尝试迭代您的 Records 并获取正文的值。

此外，如果您正在执行布尔条件，最好将值解析为整数，因为来自 JSON 的数据将 return 字符串（自然地）；在我的示例中，我使用 + Unary Plus 运算符解析它。

var data = {
  "Records": [{
      "messageId": "20ea364e-3bc107b5c78c",
      "receiptHandle": "AQEB6DhNloFS4R66c=",
      "body": "1",
      "attributes": {
          "ApproximateReceiveCount": "1",
          "SentTimestamp": "15393506",
          "SenderId": "AROAJMTI6NE:errorLog",
          "ApproximateFirstReceiveTimestamp": "15393511"
      },
      "messageAttributes": {},
      "md5OfBody": "c4ca75849b",
      "eventSource": "aws:sqs",
      "eventSourceARN": "arn:aws:sqs:ap-suth-1:83362:escalateErrorStandardQueue",
      "awsRegion": "ap-south-1"
  }]
};

for (record in data.Records)
{
  console.log('Normal JSON value:', typeof data.Records[record].body);
  console.log('Parsed JSON value:', typeof +data.Records[record].body);
  console.log('The Record body is:', +data.Records[record].body);
}

如何从jsondata中获取key的值

How to get value of key from jsondata

javascript

lambda

json

amazon-sqs

node.js