I am encountering an issue while consuming an API that returns a JSON string. When attempting to convert the JSON string response from the API to a Map<String, Object>, it throws an error. However, when I manually embed the same JSON string response into my code and perform the conversion to a Map<String, Object>, it works seamlessly. Understanding this behavior has proven to be quite challenging for me
Error :
Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testService': Invocation of init method failed; nested exception is java.lang.RuntimeException: com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of java.util.LinkedHashMap (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('{')
at [Source: (String)""{"DXX":{"NX":"XXDHX XXK XIMIXED","XXXX":"X001654011000000087","NXme1":"XINHX","XXhmId":"16401","XXhmNXme":"MXXXEXXXXD WXXXD","InXXXX":"1","XXXNXme":"XXXIVE","XXXXhgDX":"00000000","XpeXXXXMXinX":"XYX","DXXXXMXinX":"00000000","XvXXXg":"I","XvXXXgNXme":"INDIVIDUXX","XuXXDiXXXXg":"N","XuXXDiXXXXXDX":"00000000","XuXXDiXXXXXX":"0000000000000000000000000","XXkMXde":"P","DeXqMXde":"P","HighXedeemXmX":"0","HighXedeemPXX":"0","XXXXXhVXX":"0","XXdPXXEXXnd":"200","XXdPXXXXughX":"0","XXdPXXXnuX":"0","[truncated 1399 chars]; line: 1, column: 1]
Json String :
{
"DXX": {
"NX": "XXDHX XXK XIMIXED",
"XXXX": "X001654011000000087",
"NXme1": "XINHX",
"XXhmId": "16401",
"XXhmNXme": "MXXXEXXXXD WXXXD",
"InXXXX": "1",
"XXXNXme": "XXXIVE",
"XXXXhgDX": "00000000",
"XpeXXXXMXinX": "XYX",
"DXXXXMXinX": "00000000",
"XvXXXg": "I",
"XvXXXgNXme": "INDIVIDUXX",
"XuXXDiXXXXg": "N",
"XuXXDiXXXXXDX": "00000000",
"XuXXDiXXXXXX": "0000000000000000000000000",
"XXkMXde": "P",
"DeXqMXde": "P",
"HighXedeemXmX": "0",
"HighXedeemPXX": "0",
"XXXXXhVXX": "0",
"XXdPXXEXXnd": "70610",
"XXdPXXXXughX": "0",
"XXdPXXXnuX": "0",
"XXdPXXXedeemed": "967",
"XXdPXXXXXed": "0",
"XXdPXXExpiXed": "0",
"XXdPXXXdjIn": "10000",
"XXdPXXXdjXuX": "0",
"GXXXeXXd": "0",
"XyXXXDXXXX": "10198",
"XXdXpndEXXnd": "0",
"YXdXpendEXXnd": "0",
"XiXeXXDXXXX": "79643",
"PXPXXXNXXXXd": "0",
"XpenXXXedXnXXX": "79643",
"XXmXMXhXXeq": "1",
"XXmXDXyXXMXh": "15",
"XXXXXmXDX": "20231215",
"NexXXXmXDX": "20240115",
"DXXpened": "20231204",
"DiXXPkXPXX": "0",
"DiXXPkXMXnVXXPXX": "0",
"XuXXDiXXXXeq": "0",
"XuXXDiXXDXyXXMXh": "0",
"XXXXDiXXuXXeDX": "00000000",
"XuXXDiXXXhXeXhXd": "0",
"XuXXDiXXMXnVXX": "0",
"WXiveMemXXee": "N",
"XXXpnDX": "2023338",
"XeXXXeXmX": "0",
"XuXXNXd": "2",
"PeXIXemNXd": "0",
"PXXXXXeNXd": "7",
"XnXXyXd": "IND",
"XuXXXd": "356",
"NXXMXhDXXXXXuX": "1",
"MXnXhXyXXXhXXXkGXXup": [
{
"DiXXXmX": "0",
"DiXXMXhDX": "20231215"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
},
{
"DiXXXmX": "0",
"DiXXMXhDX": "00000000"
}
],
"XXXXXpenXniDXXe": "20241204",
"XXdDiXXXXXhXXXk": "0",
"XXdXpendXmX": "0"
}
}
code:
HttpHeaders headers = new HttpHeaders();
RestTemplate restTemplate = new RestTemplate();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.setAccept(Collections.singletonList(MediaType.ALL));
headers.add("api_key","qwerqwersadfaf");
headers.add("x-session-id","asdfasdf");
headers.add("x-user-id","asdfasdfas");
headers.add("x-message-id","asdfasdfas");
String bodyTopost = "{\"Data\": {\"Account\": \"SAMPLEaccount\",\"Schm\": \"168401\"}}";
HttpEntity<String> entity = new HttpEntity<String>(bodyTopost, headers);
ParameterizedTypeReference<String> parameterizedTypeReference = new ParameterizedTypeReference<String>() {
};
String inputUrl = "https://api.testbank.co.in/cons/abcd/v1";
try {
ResponseEntity<String> result = restTemplate.exchange(inputUrl, HttpMethod.POST, entity, parameterizedTypeReference);
if (result.getStatusCode().is2xxSuccessful()) {
if (result.getBody() != null) {
String resultBody = result.getBody().replace("\\", "");
logger.info("Response value is {}", resultBody);
ObjectMapper mapper = new ObjectMapper();
Map<String, Object> map = mapper.readValue(resultBody, Map.class);
return map;
} else {
logger.info("Payload is null");
return null;
}
} else {
logger.info("Failed to execute api");
return null;
}
} catch (ResourceAccessException e) {
logger.info("Resource Erro {} ", e);
return null;
} catch (RestClientException e) {
logger.info("Rest Error Erro {} ", e);
return null;
} catch (JsonMappingException e) {
throw new RuntimeException(e);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
When attempting to convert the JSON string response from the API to a Map<String, Object>, it throws an error. However, when I manually embed the same JSON string response into my code and perform the conversion to a Map<String, Object>, it works seamlessly.
String data="{"DXX":{"NX":"XXDHX XXK XIMIXED","XXXX":"X001654011000000087","NXme1":"XINHX","XXhmId":"16401","XXhmNXme":"MXXXEXXXXD WXXXD","InXXXX":"1","XXXNXme":"XXXIVE","XXXXhgDX":"00000000","XpeXXXXMXinX":"XYX","DXXXXMXinX":"00000000","XvXXXg":"I","XvXXXgNXme":"INDIVIDUXX","XuXXDiXXXXg":"N","XuXXDiXXXXXDX":"00000000","XuXXDiXXXXXX":"0000000000000000000000000","XXkMXde":"P","DeXqMXde":"P","HighXedeemXmX":"0","HighXedeemPXX":"0","XXXXXhVXX":"0","XXdPXXEXXnd":"200","XXdPXXXXughX":"0","XXdPXXXnuX":"0","XXdPXXXedeemed":"2","XXdPXXXXXed":"0","XXdPXXExpiXed":"0","XXdPXXXdjIn":"10000","XXdPXXXdjXuX":"0","GXXXeXXd":"0","XyXXXDXXXX":"10198","XXdXpndEXXnd":"0","XXdPXXEXXnd":"70610","XXdPXXXXughX":"0","XXdPXXXnuX":"0","XXdPXXXedeemed":"967","XXdPXXXXXed":"0","XXdPXXExpiXed":"0","XXdPXXXdjIn":"10000","XXdPXXXdjXuX":"0","YXdXpendEXXnd":"0","GXXXeXXd":"0","XiXeXXDXXXX":"79643","PXPXXXNXXXXd":"0","XpenXXXedXnXXX":"79643","XXmXMXhXXeq":"1","XXmXDXyXXMXh":"15","XXXXXmXDX":"20231215","NexXXXmXDX":"20240115","DXXpened":"20231204","DiXXPkXPXX":"0","DiXXPkXMXnVXXPXX":"0","XuXXDiXXXXeq":"0","XuXXDiXXDXyXXMXh":"0","XXXXDiXXuXXeDX":"00000000","XuXXDiXXXhXeXhXd":"0","XuXXDiXXMXnVXX":"0","WXiveMemXXee":"N","XXXpnDX":"2023338","XeXXXeXmX":"0","XuXXNXd":"2","PeXIXemNXd":"0","PXXXXXeNXd":"7","XnXXyXd":"IND","XuXXXd":"356","NXXMXhDXXXXXuX":"1","MXnXhXyXXXhXXXkGXXup":[{"DiXXXmX":"0","DiXXMXhDX":"20231215"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"},{"DiXXXmX":"0","DiXXMXhDX":"00000000"}],"XXXXXpenXniDXXe":"20241204","XXdDiXXXXXhXXXk":"0","XXdXpendXmX":"0"}}";
ObjectMapper mapper = new ObjectMapper(); Map<String, Object> map = mapper.readValue(data, Map.class);
The error occurs when I directly convert the response from the API to Map<String, Object>
It seams the string returned from API has two extra quotes, one of begin and other at the end of string, look the source property at stack trace:
[Source: (String)""{"DXX":{"NX":"XXDHX XXK ...An option to resolve this is to remove the extra quotes before to read the values, like this:
Code used to reproduce this error: