Java spring rest service does not cast parameter

Question

I'm create REST api with springFramework. Create products from post api, but rest method does not cast the parameters with TitleCase parameter name.

My Product model:

public class Product extends BaseModel {

    private String title;
    private String shortDescription;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getShortDescription() {
        return shortDescription;
    }

    public void setShortDescription(String shortDescription) {
        this.shortDescription = shortDescription;
    }
}

My Product REST Api:

@PostMapping(value = "/product", consumes = {MediaType.APPLICATION_JSON_VALUE})
public ApiResponse Insert(@RequestBody Product model){
    ApiResponse response = new ApiResponse();

    try{
        response.setData(_service.Insert(model));
        response.setSuccess(true);
    } catch (Exception ex){
        response = _service.HandleException(ex);
    }

    return response;
}

Worked Request Object:

{
    "title" : "TEST",
    "shortDescription" : "SD",
    "longDescription" : "LD"
}

Not Worked Request Object:

{
    "Title" : "TEST",
    "ShortDescription" : "SD",
    "LongDescription" : "LD"
}

I want both options to work. I'm new to Java, so I did not know how to get around to it, so I wanted to ask.

UPDATED

Jackson Config File

@Configuration
@EnableWebMvc
public class JacksonConfiguration {
    @Bean
    public ObjectMapper objectMapper() {
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);

        return mapper;
    }
}

Thanks.

Answer 1

This works fine:

package com.example;

import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.junit.Before;
import org.junit.Test;


import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;

public class Test {

private ObjectMapper mapper;

public static class A{

    private int test;

    public int getTest() {
        return test;
    }

    public void setTest(int test) {
        this.test = test;
    }
}

@Before
public void setUp(){
    mapper = new ObjectMapper();
    mapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);
}

@Test
public void deserialise() throws Exception {
    String json = "{\"test\":\"2\"}";
    assertThat(mapper.readValue(json, A.class).getTest(), is(2));
}

@Test
public void deserialiseIgnoringCase() throws Exception {
    String json = "{\"Test\":\"2\"}";
    assertThat(mapper.readValue(json, A.class).getTest(), is(2));
}

}

Answer 2

Product model does not seem to have longDescription field. That might be the reason why deserialisation will fail (as there is no @JsonIgnore ) on Product class. Below snippet works fine:

class Product {
    private String title;
    private String shortDescription;
    private String longDescription;
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getShortDescription() {
        return shortDescription;
    }
    public void setShortDescription(String shortDescription) {
        this.shortDescription = shortDescription;
    }
    public String getLongDescription() {
        return longDescription;
    }
    public void setLongDescription(String longDescription) {
        this.longDescription = longDescription;
    }
}

public static void main(String[] args) throws Exception{
     ObjectMapper mapper = new ObjectMapper();
     mapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);
     Product product = mapper.readValue("{\"Title\" : \"TEST\",\"ShortDescription\" : \"SD\",\"LongDescription\" : \"LD\"}", Product.class);
     System.out.println(product.getShortDescription());
}

It will throw an Exception if you comment out longDescription .