java 传入json 转换成java对象 返回java对象转成json

package com.dr.service.server.fanhua.service;

import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.springframework.stereotype.Service;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.dr.service.common.exception.SRConts;
import com.dr.service.server.fanhua.dto.request.createtaskb.CreateTaskB;
import com.dr.service.server.fanhua.dto.response.createtaskb.CreateTaskBResponse;
import com.dr.service.server.fanhua.util.FanHuaUtil;
import com.dr.service.server.fanhua.util.HttpClientUtils;
import com.dr.service.server.fanhua.util.Logger;
import com.dr.service.server.fanhua.util.MD5Util;
import com.dr.util.Constants;
import com.dr.util.FileUtil;


@Service("createTaskBService")
public class CreateTaskBService {
    protected Logger logger = Logger.getLogger(this.getClass());

    public CreateTaskBResponse createTaskB(CreateTaskB createTaskB) {
        CreateTaskBResponse jb = new CreateTaskBResponse();

        try {
            Map headerMap = new HashMap();

            Properties dbProps = new Properties();
            dbProps.load(FanHuaUtil.loads());

            logger.info("==================CreateTaskB标准（接口）发送报文========================");

            JSONObject body = (JSONObject) JSON.toJSON(createTaskB);

            FileUtil.createFanHuaFBXLog("CreateTaskBService", "FanHua",
                    body.toString(), Constants.REQUEST);

            // JSONObject body=(JSONObject)JSONObject.fromObject(fo);
            headerMap.put("channelId", dbProps.getProperty("channelId"));
            headerMap
                    .put("sign",
                            MD5Util.encode(body
                                    + dbProps.getProperty("channelSecret")));

            logger.info(body + dbProps.getProperty("channelSecret"));
            logger.info("==================CreateTaskB标准（接口）返回报文========================");
            Map map = HttpClientUtils.HttpClientJsonPostHeader(
                    dbProps.getProperty("createTaskB"), body.toString(),
                    dbProps.getProperty("encoding"), headerMap);
            logger.info(map.get("info"));

            FileUtil.createFanHuaFBXLog("CreateTaskBService", "FanHua", map
                    .get("info").toString(), Constants.RESPONSE);

            if (map.get("code").equals("200")) {
                jb = (CreateTaskBResponse) JSON.parseObject(
                        (String) map.get("info"), CreateTaskBResponse.class);
            }
        } catch (Exception e) {
            jb.setCode(SRConts.SR_0004[0]);
            jb.setMsg(SRConts.SR_0004[0]);
        }
        logger.info(jb);
        return jb;

    }
}