No suitable HttpMessageConverter found when trying to execute restclient request

Question

I'm trying to use Spring for Android rest client to send data with an http post , to avoid creating and parsing the json data.

From their manual they have the following method:

restTemplate.postForObject(url, m, String.class)

After the method is called I get the following exception:

No suitable HttpMessageConverter found when trying to execute restclient request

My activity code snippet is :

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
restTemplate.getMessageConverters().add(new StringHttpMessageConverter());
Message m = new Message();
m.setLibrary("1");
m.setPassword("1395");
m.setUserName("1395");
String result = restTemplate.postForObject(url, m, String.class);

And the Message object is :

public class Message {
    private String UserName, Password, Library;

    public String getUserName() {
        return UserName;
    }

    public void setUserName(String userName) {
        UserName = userName;
    }

    public String getPassword() {
        return Password;
    }

    public void setPassword(String password) {
        Password = password;
    }

    public String getLibrary() {
        return Library;
    }

    public void setLibrary(String library) {
        Library = library;
    }
}

Why can't it convert the Message object to JSON ?

Answer 1

There could be a few different reasons why this can happen. In my case, i had the RestTemplate already wired in, but still got this error. Turns out, i had to add a dependency on "jackson-databind":

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
</dependency>