{"messageHistory",[{"message":"123","time":"2023-03-22 10:00:00"}],"isContextChat":true}

@RequestMapping(value = "getRequestJson", method = RequestMethod.POST)
@ResponseBody
public String getRequestJson(HttpServletRequest request) throws IOException {
    StringBuilder buffer = new StringBuilder();
    BufferedReader reader = request.getReader();
    String line;
    while ((line = reader.readLine()) != null) {
        buffer.append(line);
    }
    String requestBody = buffer.toString();
    System.out.println("--------> get request json is :" + requestBody);
	return requestBody;
}

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
@RequestMapping(value = "getRequestJson", method = RequestMethod.POST)
@ResponseBody
public String getRequestJson(HttpServletRequest request) throws IOException {
	// 1. 從HttpServletRequest對(duì)象中獲取輸入流，并讀取請(qǐng)求正文。
	StringBuilder buffer = new StringBuilder();
	BufferedReader reader = request.getReader();
	String line;
	while ((line = reader.readLine()) != null) {
		buffer.append(line);
	}
	String requestBody = buffer.toString();
	// 2. 使用JSON庫(kù)（如Jackson、Gson等）將字符串解析為JsonNode或任何其他適合你的數(shù)據(jù)結(jié)構(gòu)。
	ObjectMapper mapper = new ObjectMapper(); // Jackson JSON庫(kù)示例
	JsonNode jsonNode = mapper.readTree(requestBody); // 解析為JsonNode對(duì)象
	// 3. 現(xiàn)在，你可以使用jsonNode對(duì)象來(lái)訪問(wèn)和操作JSON數(shù)據(jù)了。
	String name = jsonNode.get("name").asText();
	int age = jsonNode.get("age").asInt();
	// 遍歷所有屬性并打印它們的值：
	Iterator<String> fieldNamesIter= jsonNode.fieldNames();
	while (fieldNamesIter.hasNext()){
		String fieldName=fieldNamesIter.next();
		JsonNode fieldValue=jsonNode.get(fieldName);
		System.out.println(fieldName+": "+fieldValue.asText());
	}
	System.out.println("--------> get request json is :" + requestBody);
	return requestBody;
}