java - 在 Spring MVC 4 中将 POJO 作为 JSON 返回

Question

我有一个非常简单的对象，我想以 JSON 形式返回

public class Event {

    private String store;
    private Date date;
    private double fee;
    private String kit;
    private String information;

和一个测试 Controller 如下

@RestController
@EnableWebMvc
public class UserController {

    @RequestMapping(value = "/user/{username}", method = RequestMethod.GET, produces = "application/json", headers="Accept=*/*")
    @ResponseBody
    public Event getUser(@PathVariable("username") String username){

        Event event = new Event("dummy", new Date(), 4.0, "dummy", "dummy");
        return event;
    }

}

我得到“此请求标识的资源只能生成具有根据请求“接受” header Not Acceptable 特征的响应。”

我的 servlet 只有这个条目

<mvc:annotation-driven />    

如何才能达到预期的输出？

Answer 1

已添加

dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.7.0</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>2.7.0</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.7.0</version>
    </dependency>