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

                + "]";

    }

}