此时@RequestBody、@ResponseBody需要与@JsonProperty结合使用，才能做到请求正常解析，响应按要求格式返回。

注意@JsonProperty注解的位置需要加在getter方法上。

如果直接加在属性上，响应会这样返回：

{
    "actionStatus": "OK",
    "errorInfo": "success",
    "errorCode": 0,
    "ActionStatus": "OK",
    "ErrorInfo": "success",
    "ErrorCode": 0
}
正常实现的示例代码如下：

@RequestMapping(value = "/tecentim/v1/callback", method = RequestMethod.POST)
    @ResponseBody
    public CallbackRsp imcallback(
            @RequestParam String SdkAppid,
            @RequestParam String CallbackCommand,
            @RequestParam String contenttype,
            @RequestParam String ClientIP,
            @RequestParam String OptPlatform,
            @RequestBody CallbackCommand command) {
 
        CallbackRsp result = new CallbackRsp();
        result.setActionStatus("OK");
        result.setErrorInfo("success");
        result.setErrorCode(0);
        
        try {
            
            System.out.println("SdkAppid:"+SdkAppid);
            System.out.println("CallbackCommand:"+CallbackCommand);
            System.out.println("contenttype:"+contenttype);
            System.out.println("ClientIP:"+ClientIP);
            System.out.println("OptPlatform:"+OptPlatform);
            System.out.println(command);
            
            
            
        } catch (DingDongFMException de) {
            logger.error("imcallback failed", de);
        } catch (Exception e) {
            logger.error("imcallback failed", e);
        }
        return result;
    }
import java.util.Arrays;
 
import com.fasterxml.jackson.annotation.JsonProperty;
 
public class CallbackCommand {
    
    
    private String CallbackCommand; //回调命令
    
    
    private String GroupId; //产生群消息的群组 ID
    
    
    private String Type; //产生群消息的 群组类型，例如 Private，Public 和 ChatRoom
    
    
    private String From_Account; //消息发送者 ID
    
    
    private Integer MsgTime; //消息发送的时间戳，对应后台 Server 时间
    
    
    private Integer MsgSeq; //消息序列号，唯一标示一条消息
    
    
    private MsgBody[] MsgBody;//消息体，具体参见 消息格式描述
    
    @JsonProperty(value = "CallbackCommand")
    public String getCallbackCommand() {
        return CallbackCommand;
    }
    public void setCallbackCommand(String callbackCommand) {
        CallbackCommand = callbackCommand;
    }
    
    @JsonProperty(value = "GroupId")
    public String getGroupId() {
        return GroupId;
    }
    public void setGroupId(String groupId) {
        GroupId = groupId;
    }
    
    @JsonProperty(value = "Type")
    public String getType() {
        return Type;
    }
    public void setType(String type) {
        Type = type;
    }
    
    @JsonProperty(value = "From_Account")
    public String getFrom_Account() {
        return From_Account;
    }
    public void setFrom_Account(String from_Account) {
        From_Account = from_Account;
    }
    
    @JsonProperty(value = "MsgTime")
    public Integer getMsgTime() {
        return MsgTime;
    }
    public void setMsgTime(Integer msgTime) {
        MsgTime = msgTime;
    }
    
    @JsonProperty(value = "MsgSeq")
    public Integer getMsgSeq() {
        return MsgSeq;
    }
    public void setMsgSeq(Integer msgSeq) {
        MsgSeq = msgSeq;
    }
    
    @JsonProperty(value = "MsgBody")
    public MsgBody[] getMsgBody() {
        return MsgBody;
    }
    public void setMsgBody(MsgBody[] msgBody) {
        MsgBody = msgBody;
    }
    @Override
    public String toString() {
        return "CallbackCommand [CallbackCommand=" + CallbackCommand + ", GroupId=" + GroupId + ", Type=" + Type
                + ", From_Account=" + From_Account + ", MsgTime=" + MsgTime + ", MsgSeq=" + MsgSeq + ", MsgBody="
                + Arrays.toString(MsgBody) + "]";
    }
    
    
 
}
import com.fasterxml.jackson.annotation.JsonProperty;
 
public class CallbackRsp {
    
    
    private String ActionStatus;
    
    
    private String ErrorInfo;
    
    
    private Integer ErrorCode;
    
    @JsonProperty(value = "ActionStatus")
    public String getActionStatus() {
        return ActionStatus;
    }
    
    public void setActionStatus(String actionStatus) {
        ActionStatus = actionStatus;
    }
    
    @JsonProperty(value = "ErrorInfo")
    public String getErrorInfo() {
        return ErrorInfo;
    }
    
    public void setErrorInfo(String errorInfo) {
        ErrorInfo = errorInfo;
    }
    
    @JsonProperty(value = "ErrorCode")
    public Integer getErrorCode() {
        return ErrorCode;
    }
    
    public void setErrorCode(Integer errorCode) {
        ErrorCode = errorCode;
    }
    
    @Override
    public String toString() {
        return "CallbackRsp [ActionStatus=" + ActionStatus + ", ErrorInfo=" + ErrorInfo + ", ErrorCode=" + ErrorCode
                + "]";
    }
    
    
}