java.lang.IllegalArgumentException: No converter found for return value of type

Question

With this code

@RequestMapping(value = \"/bar/foo\", method = RequestMethod.GET)
    public ResponseEntity foo() {

        Foo model;
        ...         


        

Answer 1

The answer written by @Marc is also valid. But the concrete answer is the Getter method is required. You don't even need a Setter.

Answer 2

I also experienced such error when by accident put two @JsonProperty("some_value") identical lines on different properties inside the class

Answer 3

Add the below dependency to your pom.xml:

 <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.10.0.pr3</version>
</dependency>

Answer 4

Use @ResponseBody and getter/setter. Hope it will solve your issue.

@RequestMapping(value = "/bar/foo", method = RequestMethod.GET)
@ResponseBody
public ResponseEntity<foo> foo() {

and update your mvc-dispatcher-servlet.xml:

<mvc:annotation-driven>
     <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
   </mvc:message-converters>
</mvc:annotation-driven>

Answer 5

Add below dependency in pom.xml:

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.10.1</version>
    </dependency>

Was facing the same issue as the return type cannot be bind with the MediaType of Class Foo. After adding the dependency it worked.

Answer 6

you didn't have any getter/setter methods.