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[英]Receiving a Bad Request Error (400) after $.ajax POST on Spring Controller
[英]Post to Spring Controller giving 404 Bad Request
我有這個ajax電話
$.ajax({
headers: {
'Content-Type': 'application/json'
},
url: urlString,
type: 'POST',
dataType: 'json',
data: JSON.stringify({
"field1": 1,
"field2": "foo",
"field3": "meh"
})
})
.done(function (dataFromServer) {
//blah
})
.fail(function (jqXHR) {
console.log(jqXHR);
});
調用這個Spring Controller
@RequestMapping(value="more/updateThisTable", method=RequestMethod.POST)
public void updateThisTable(@RequestBody String jsonInput) throws JsonProcessingException, IOException {
TableDTO t;
TableImporter tImp = null;
t= crewImp.getTableDTO(jsonInput);
System.out.println(t);
tableService.updateThisTable(t);
};
將此進口商稱為
public TableDTO getTableDTO(String json) throws JsonProcessingException, IOException{
TableDTO tDTO = new TableDTO();
ObjectMapper mapper = new ObjectMapper();
JsonNode root = mapper.readTree(json);
tDTO.setId(root.path("field1").asInt());
tDTO.setCrewGroupId(root.path("field2").asText());
tDTO.setName(root.path("field3").asText());
return tDTO;
}
我在瀏覽器控制台中收到此錯誤消息
"Could not read JSON: Can not deserialize instance of java.lang.String out of START_OBJECT token↵ at [Source: java.io.PushbackInputStream@124b300; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token↵ at [Source: java.io.PushbackInputStream@124b300; line: 1, column: 1]"
我正在使用Jackson嘗試從JSON轉換為Java DTO。 我收到此錯誤,不知道如何解決。
好的-您的代碼如下所示:
@RequestMapping(value="more/updateThisTable", method=RequestMethod.POST, headers="Accept=application/json")
public void updateThisTable(@RequestBody TableDTO t) throws JsonProcessingException, IOException {
System.out.println(t);
tableService.updateThisTable(t);
};
另外,F12您的瀏覽器並查看傳出消息以確保其合法的JSON。
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