json.simple.JSONObject无法使用AWS Lambda转换为java.lang.String JAVA

Question

我试图使用Java Lambda从POST请求中解析“Body”。我遇到了这个错误一段时间。

org.json.simple.JSONObject cannot be cast to java.lang.String 

但是，当记录的样子，身体：

{"body":{"email":"test@test.com"}} 

女巫应与解析我'做正确的工作吗？ 奇怪的是插入正在使用JUNIT进行本地化，但是在AWS之后没有联机。

@Override 
public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException { 
    logger = context.getLogger(); 
    BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); 
    Number user_id = null; 
    String birthdate = null; 
    List<Number> company_id = new ArrayList<Number>(); 
    String email = null; 
    String employment_status = null; 
    String firstname = null; 
    String lastname = null; 
    String login = null; 
    String profile = null; 
    List<Number> site_id = new ArrayList<Number>(); 
    String validation_status = null; 
    JSONObject responseJson = new JSONObject(); 

    Map<String, AttributeValue> expressionAttributeValues = new HashMap<String, AttributeValue>(); 
    String filterExpression = ""; 
    String RegionAWS = REGION.toString(); 
    client = AmazonDynamoDBClientBuilder.standard().withRegion(RegionAWS).build(); 
    DynamoDB dynamoDB = new DynamoDB(client); 
    Table table = dynamoDB.getTable("LI_user"); 
    try { 
     JSONParser parser = new JSONParser(); 
     JSONObject event = (JSONObject) parser.parse(reader); 
     logger.log(event.toJSONString()); 
     if (event.get("body") != null) { 
      JSONObject bod = (JSONObject)parser.parse((String)event.get("body")); 
     // JSONObject bod = (JSONObject) event.get("body"); 
      if (bod.get("id") != null) { 
       user_id = (Number)bod.get("id"); 
      } 
      if (bod.get("birthdate") != null) { 
       birthdate = (String)bod.get("birthdate"); 
      } 
      if (bod.get("email") != null) { 
       email = (String) bod.get("email"); 
      } 
      if (bod.get("employment_status") != null) { 
       employment_status = (String) bod.get("employment_status"); 
      } 
      if (bod.get("firstname") != null) { 
       firstname = (String) bod.get("firstname"); 
      } 
      if (bod.get("lastname") != null) { 
       lastname = (String) bod.get("lastname"); 
      } 
      if (bod.get("login") != null) { 
       login = (String) bod.get("login"); 
      } 
      if (bod.get("profile") != null) { 
       profile = (String) bod.get("profile"); 
      } 
      if (bod.get("validation_status") != null) { 
       validation_status = (String) bod.get("validation_status"); 
      } 
     } 

Answer 1

更换

JSONObject bod = (JSONObject)parser.parse((String)event.get("body")); 

与

JSONObject bod = (JSONObject)event.get("body"); 

如果event始终是JSONObject实例（因为它似乎理所当然，否则你将在JSONObject event = (JSONObject) parser.parse(reader);得到ClassCast）

您会看到登录

{"body":{"email":"test@test.com"}} 

只是因为logger.log(event.toJSONString());

Answer 2

是感谢你，我有进步。 但现在它看起来像当我发送与邮差的JSON格式的数据，他收到一个字符串版本的身体。我得到的CloudWatch日志这样的数据：

 "resource": "/users", 
    "httpMethod": "POST", 
    "queryStringParameters": null, 
    "stageVariables": null, 
    "body": "{\n \"id\": 5,\n \"company_id\": [\n 1\n ],\n \"email\": \"test@test.com\",\n \"employment_status\": \"FULL-TIME\",\n \"firstname\": \"Sebastien\",\n \"lastname\": \"LALALLALA\",\n \"login\": \"test@test.com\",\n \"profile\": \"FULL-TIME\",\n \"site_id\": \"55\",\n \"birthdate\": \"1985.05.05\",\n \"validation_status\" : \"COMPLETE\"\n}\n" 
} 

而这个错误：

java.lang.ClassCastException: java.lang.String cannot be cast to org.json.simple.JSONObject