Question

我从网络服务中获取了一些数据。这是字符串

（正文：＆＃39; 3886＆＃39; MessageProperties [headers = {}，timestamp = null， messageId = null，userId = null，receivedUserId = null，appId = null， clusterId = null，type = null，correlationId = null， correlationIdString = null，replyTo = null，的contentType =应用程序/ x-java的序列化对象， contentEncoding = null，contentLength = 0，deliveryMode = null， receivedDeliveryMode = PERSISTENT，expiration = null，priority = 0， redelivered = false，receivedExchange =， receivedRoutingKey = bottomlesspit，receivedDelay = null，deliveryTag = 62， messageCount = 0，consumerTag = amq.ctag-sCwfLaMEqWp2GkFwFrY1yg， consumerQueue = bottomlesspit]）

它看起来像json，但键值对几乎没问题，但最重要的键是Body并不像字符串所说的其他键。

我需要阅读Body的值，并且能够获得像这样的值

   console.log(d.body);
   //This above outputs the string as shown
   obj = eval('{' + d.body + '}');
   console.log(obj);
   var match = "Body";
   var val = obj.find( function(item) { return item.key == match } );
   console.log(val);

如何读取密钥Body的值？

Answer 1

使用此正则表达式而不是匹配Body：

\bBody:'(\d*)'

这将捕获组1中的Body编号。

Answer 2

您可以编写解析器函数获取字符串并提取值。这里有一个非常简单的功能。您也可以修改所有例外情况。

＆＃13;

var str = `(Body:'3886' MessageProperties [headers={}, timestamp=null, messageId=null, userId=null, receivedUserId=null, appId=null, clusterId=null, type=null, correlationId=null, correlationIdString=null, replyTo=null, contentType=application/x-java-serialized-object, contentEncoding=null, contentLength=0, deliveryMode=null, receivedDeliveryMode=PERSISTENT, expiration=null, priority=0, redelivered=false, receivedExchange=, receivedRoutingKey=bottomlesspit, receivedDelay=null, deliveryTag=62, messageCount=0, consumerTag=amq.ctag-sCwfLaMEqWp2GkFwFrY1yg, consumerQueue=bottomlesspit])`;

function f(inp) {
  var index = str.indexOf(inp),
       endIndex;
  for(var i = index; i < str.length; i ++) {
    if(str[i] == ',') {
      endIndex = i;
      break;
    }
  }
  var output = str.substr(index, endIndex).split('=');
  return output;
}

console.log(f('consumerQueue'));

＆＃13;

Answer 3

为什么不使用正则表达式来匹配和提取Body。

示例：

const match = d.body.match(/Body:\'(.+)\'/)
if (match) {
  const body = match[1] // This is the value of Body
} else {
   // Unable to find Body, handle it here
}

将严重字符串化的json转换为json对象

3 个答案: