无法使用 POST 请求发送 JSON

Question

这是我的控制器：

@RequestMapping(value = "", method = RequestMethod.POST)
public @ResponseBody ResponseEntity<String> create(
        @RequestBody Category category) {

    if (categoryService.create(category)) {
        return new ResponseEntity<String>(HttpStatus.OK);
    } else {
        return new ResponseEntity<String>(HttpStatus.NOT_FOUND);
    }
}

这是我的配置：

    <!-- Enables the Spring MVC @Controller programming model -->
    <annotation-driven />

    <!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
    <resources mapping="/resources/**" location="/resources/" />

    <!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
    <beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <beans:property name="prefix" value="/WEB-INF/views/" />
        <beans:property name="suffix" value=".jsp" />
    </beans:bean>

    <beans:bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <beans:property name="messageConverters">
        <beans:list>
            <beans:bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>
        </beans:list>
    </beans:property>
</beans:bean>

<context:component-scan base-package="ru.tenet.cafe" />

这是类别类：

private Integer id;

private String title;

private String engTitle;

private String description; 

private List<MenuItem> menuItems;   

public Category()
{

}
public Category(Integer id, String title, String engTitle,
        String description, List<MenuItem> menuItems) {
    super();
    this.id = id;
    this.title = title;
    this.engTitle = engTitle;
    this.description = description;
    this.menuItems = menuItems;
}

// getters and setters

如果我尝试使用 Content-type:application/json 和以下正文发送 post 请求：

{"id":8,"title":"Пицца","engTitle":"Pizza","description":null,"menuItems":[{"id":4,"title":"Пепперони ","engTitle":"Pepperoni","price":300.0,"description":"Сами лючщи пица слющи。 Тольки щто привезли дарагой.","consistOf":"E666, стальная стружка, вода (без ГМО)","volumeValue":500.0,"volumeTitle":"г"},{"id":5,"title":"Маргарита","engTitle":"Margarita","price":400.0,"description ":"Сами сочни пица слющи。 Мамай клянус.","consistOf":"Перец, сыр, колбаска, ногти","volumeValue":500.0,"volumeTitle":"г"},{"id":6,"title":"Кавказ","engTitle":"Kavkaz ji est","price":300.0,"description":"Вах пица. Сам ем дарагой.","consistOf":"Ароматизатор \"Гусь\" идентичный натуральному","volumeValue":500.0,"volumeTitle":"г"}]}

我会得到：

HTTP 状态 415。服务器拒绝此请求，因为请求 实体的格式不受请求的资源支持 请求的方法。

怎么了？

统一更新： 添加这个 @RequestMapping(value = "", method = RequestMethod.POST,consumes = MediaType.APPLICATION_JSON_VALUE,produces = "application/json") 给了我同样的结果

Answer 1

我遇到了同样的问题

我删除了@RequestBody 并改为使用字符串。在您的情况下，它将是 @Requestparam String 类别

现在类别将是 JSON 格式的字符串。现在使用 json 反序列化器并反序列化 json

注意：我承认这不是您当前问题的解决方案，但这是替代解决方案