删除字符串消息中不需要的部分

Question

我有一条消息来自一个压力传感器通过TCP。消息如下所示。它有一个重复的部分和传感器数据的json格式。我想从消息中删除重复部分，只提取json数据部分。有人能帮我用java语言做这件事吗？

重复部分

POST /V1.0/data.aspx HTTP/1.1
Host: 124.43.5.212
User-Agent: RT-Thread HTTP Agent           
Connection: Keep-Alive
Content-Length: 4349

JSON数据

{
  "device": "0305170025",
  "Business": "0305170025",
  "version": "V1.0",
  "session": 1631171130,
  "command": "send_server_measure",
  "content": {
    "measure": [
      {
        "name": "press",
        "datatype": "float",
        "content": [
          {
            "t": 1631169540,
            "v": 9901
          },
          {
            "t": 1631169550,
            "v": 9901
          },
          {
            "t": 1631169560,
            "v": 9901
          },
          {
            "t": 1631171130,
            "v": 9901
          }
        ]
      }
    ]
  }
}

Answer 1

非常简单的解决方案

String message = "<your message with header and json body>";
String json = message.substring(message.indexOf('{'));