与@requestbody的Spring mvc错误请求

我有一个带有该签名的Spring MVC服务:

@RequestMapping(method = RequestMethod.POST, value = "/addUser", consumes = "application/json")
    public @ResponseBody User addUser(@RequestBody User user) {

这在context.xml中

我发一个Post请求,总是给我一个400error-> Bad请求.我写了一个过滤器来读取请求内容,这是:

编辑json:

{
    "email": "Anchor",
    "latitude": 40.3139461,
    "longitude": -3.8810229,
    "name": "a",
    "online": true,
    "password": "a",
    "deviceRegId": "APA91bGnD1EuqEm9cpoHsenC-HEphQJRniEnhPovK24QkKkLBXrDesSCP6CFlyOKwR1huwSI28Wd-DdN0N8MDKle7myYB7Dznzc3Z11ZOv3jMlJEIegykpnnnYScrElw2czQEa4pKFeQW7BklUsUS-IB15LMqH_Ag"
}

编辑:用户类

public class User implements Serializable{


@JsonProperty("deviceRegId")
private java.lang.String deviceRegistrationID;
@JsonProperty("email")
private java.lang.String email;
@JsonProperty("latitude")
private java.lang.Double latitude;
@JsonProperty("longitude")
private java.lang.Double longitude;
@JsonProperty("name")
private java.lang.String name;
@JsonProperty("online")
private java.lang.Boolean online;
@JsonProperty("password")
private java.lang.String password;

public User(String deviceRegid) {
    this.deviceRegistrationID = deviceRegid;
    this.online = true;
}

public java.lang.String getDeviceRegistrationID() {
    return deviceRegistrationID;
}

public java.lang.String getEmail() {
    return email;
}

public void setEmail(java.lang.String email) {
    this.email = email;
}

public java.lang.Double getLatitude() {
    return latitude;
}

public void setLatitude(java.lang.Double latitude) {
    this.latitude = latitude;
}

public java.lang.Double getLongitude() {
    return longitude;
}

public void setLongitude(java.lang.Double longitude) {
    this.longitude = longitude;
}

public java.lang.String getName() {
    return name;
}

public void setName(java.lang.String name) {
    this.name = name;
}

public java.lang.Boolean getOnline() {
    return online;
}

public void setOnline(java.lang.Boolean online) {
    this.online = online;
}

/**
 * @return value or {@code null} for none
 */
public java.lang.String getPassword() {
    return password;
}

/**
 * @param password
 *            password or {@code null} for none
 */
public void setPassword(java.lang.String password) {
    this.password = password;
}

有什么问题？