java - 无法配置 Jackson 混音

Question

您能否帮助我正确配置Jackson与Spring MVC混合注释以自定义JSON响应。

这就是我现在拥有的:

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
    <property name="messageConverters">
        <list>
            <ref bean="jsonMessageConverter"/>
        </list>
    </property>
</bean>
<bean id="jsonMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>

我不知道如何配置它来映射这两个类...:addMixInAnnotations(User.class, UserMixIn.class);

Answer 1

在 Controller 构造函数中初始化后，将 mixin 配置添加到 ObjectMapper 中:

@Controller
public class MyController {

    private ObjectMapper objectMapper = new ObjectMapper();

    public MyController(ObjectMapper objectMapper) {
        this.objectMapper = objectMapper;
        objectMapper.addMixInAnnotations(User.class, UserMixIn.class);
    }

    @RequestMapping("/some-path")
    @ResponseBody
    public String someMethod()  {
        List<User> users = new ArrayList<User>(); // Mock List to hold your Users
        users.add(new User()); // Keep adding some users
        return objectMapper.writeValueAsString(users, new TypeReference<List<User>>() {});
    }
}

并查看输出:)