【Java】接口开发中关于接受和发送json的相关范例

接受json

package com.suneee.scn.wms.web.rocketmq;

import java.util.List;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Service;
import org.springframework.web.context.support.WebApplicationObjectSupport;

import com.suneee.scn.common.exception.ScnException;
import com.suneee.scn.message.model.MsgInfo;
import com.suneee.scn.message.receive.MsgConsumerI;
import com.suneee.scn.wms.consumer.impl.ItemMainConsumer;
import com.suneee.scn.wms.dao.ItemMainDao;
import com.suneee.scn.wms.model.dbo.Item;
import com.suneee.scn.wms.model.dbo.ItemInterDO;
import com.suneee.scn.wms.model.dbo.ItemMainDO;

@Service("itemMessage")
public class ItemMessage extends WebApplicationObjectSupport implements
        MsgConsumerI {

    private static final Logger log=LoggerFactory.getLogger(ItemMessage.class);

    @Autowired
    private ItemMainDao itemMainDao;

    private static ApplicationContext applicationContext = null;

    public static ApplicationContext getAppContext() {
        return applicationContext;
    }

    public static Object getBean(String name) {
        return applicationContext.getBean(name);
    }

     @Override
     protected void initApplicationContext(ApplicationContext context) {
     super.initApplicationContext(context);
         if(applicationContext == null){
         applicationContext = context;
       }
     }

    @Override
    public boolean dealMsg(MsgInfo msg) {

        log.debug("send数据已经传过来了:"+msg.getData());
        //{'request': {'enterpriseid': 55,'ownerCode': 'SunEee01',
        //'item': {'itemName': '熊孩子新疆无花果成品268g','itemType': 'ZC','barCode': '6924459400256',' shelfLife ': 0,'itemCode': 'xhzwhggcp_268'}}}

        //分解json
        JSONObject jsonObject = JSONObject.fromObject(msg.getData());
        String request = jsonObject.getString("request");
        JSONObject itemd = JSONObject.fromObject(request);
        String items = itemd.getString("item");
        JSONObject item = JSONObject.fromObject(items);

        ItemMainDO the = new ItemMainDO();
        the.setEnterpriseid(Long.valueOf(itemd.getInt("enterpriseid")));
        the.setClientcode(itemd.getString("ownerCode"));

        the.setDescription(item.getString("itemName"));
        the.setItemnumber(item.getString("itemCode"));
        the.setItemtype(item.getString("itemType"));
        the.setDisplayitemnumber(item.getString("barCode"));
        the.setShelflife(item.getInt("shelfLife"));

        //获取对象
        ItemMainConsumer itemMainComsumer = (ItemMainConsumer) applicationContext.getBean("itemMainConsumer");    

        int ok;
        try {
            ok = itemMainComsumer.insertItemMain(the);

            if(ok>0){
                   log.debug("商品同步成功!");
                   return true;
               }else if(ok==-1){
                   log.debug("商品【"+item.getString("itemName")+"】已经存在!");
                   return true;
               }else{
                   log.debug("商品同步失败!");
                   return false;
               }
        } catch (ScnException e) {
            e.printStackTrace();
        }
             return true;
}}

注意：

String items = itemd.getString("KEY");里面的itemd必须是JSONObject。

比如：

{'request': {'enterpriseid': 55,'ownerCode': 'SunEee01','item': {'itemName': '熊孩子新疆无花果成品268g','itemType': 'ZC','barCode': '6924459400256',' shelfLife ': 0,'itemCode': 'xhzwhggcp_268'}}}

JSONObject jsonObject = JSONObject.fromObject(msg.getData());---将json的整个string字符串转为JSONObject对象

String request = jsonObject.getString("request");--提取出key为request的value

JSONObject itemd = JSONObject.fromObject(request);--将属性为string的request的value再次转为JSONObject，为了下一步再次提取下一层的value
String items = itemd.getString("item");--提取key为item的value
JSONObject item = JSONObject.fromObject(items);--将items转为JSONObject

通过item.getInt("shelfLife")或者itemd.getString("ownerCode");来提取所需的value

如果遇到多条数据为'XX':[{...},{...}]形势的以下方法处理
例如
提取到最后key为item的String字符串为"item":[{"itemName":"熊孩子新疆无花果成品268g","itemType":"ZC","barCode":"6924459400256","shelfLife ":0,"itemCode":"xhzwhggcp_268"},{"itemName":"好孩子新疆无花果成品268g","itemType":"ZC","barCode":"6924459400256","shelfLife ":1,"itemCode":"xhzwhggcp_268"}]
用下面方法先获取到value值vendorDO.getString("item")获取的值和vendorDO.getJSONArray("item")是一样的，但是前者类型为String，后者是JSONArray，为了使用后面的转换方法，必须用JSONArray格式的
JSONArray ents = vendorDO.getJSONArray("item");
List<Item> ss = (List<Item>)JSONArray.toList(ents,Item.class);---将value转成list对象
for(Item x:ss){System.out.println(x.getItemName());}---提取即可

发送json：

package com.suneee.scn.wms.web.rocketmq;

import java.io.UnsupportedEncodingException;
import java.util.List;

import org.apache.rocketmq.client.exception.MQBrokerException;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.remoting.exception.RemotingException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import com.suneee.scn.message.model.MsgInfo;
import com.suneee.scn.message.send.MQProducer;
import com.suneee.scn.message.send.MQSend;
import com.suneee.scn.wms.consumer.impl.OrderConsumer;
import com.suneee.scn.wms.model.dbo.OrderDO;
import com.suneee.scn.wms.model.dbo.OrderDetailDO;
import com.suneee.scn.wms.model.dbo.ShiplabelDO;

@Controller("deliveryOrderSendController")
public class DeliveryOrderSendController {
    private static final Logger log=LoggerFactory.getLogger(DeliveryOrderSendController.class);

    @Autowired
    private MQProducer producer;

    @Autowired
    private MQSend msgSend;

    @Autowired
    private OrderConsumer orderConsumer;

    //@Scheduled(cron="0/50 * * * * ? ") //间隔5秒执行
    public void taskCycle(){

        log.debug("【执行定时器开始............发货单！】");

        MQSend mqs = new MQSend();
        mqs.setProducer(producer.getProducer());
        MsgInfo mi = new MsgInfo();
        mi.setTopic("WmsTopic");
        mi.setType("deliveryOrderConfirm");
        //-----------------------------------------------------------

        //1.先去sp_order_main查出ordernumber,storeordernumber,clientcode,status等属性
        List<OrderDO> sodlist = orderConsumer.findOrderNumber();

        //2.循环list
        for(OrderDO sod:sodlist){
            StringBuilder sb = new StringBuilder();

            String ordernumber = sod.getOrdernumber();
            String storeordernumber = sod.getStoreordernumber();
            int enterpriseid = sod.getEnterpriseid();

            //2.1 去shippinglabel查出barcode，carrier，weight
            ShiplabelDO shiplabelDO = orderConsumer.queryShiplabelDOByOrderNumber(ordernumber);
            String logisticsCode = shiplabelDO.getCarriercode();
            String expressCode = shiplabelDO.getShiplabel();
            Long weight = shiplabelDO.getWeight();
            sb.append("{'request': {'deliveryOrder': {'enterpriseid': "+enterpriseid+",'deliveryOrderCode': ' "+storeordernumber+" ','deliveryOrderId': ' "+ordernumber+" ','warehouseCode': 'SunEee01','orderType': 'JYCK','status':'DELIVERED','outBizCode': ' "+ordernumber+" '},");
            sb.append(" 'packages': {'package': {'logisticsCode': ' "+logisticsCode+" ','expressCode': ' "+expressCode+" ','weight': ' "+weight+" '}},");
            sb.append(" 'orderLines': {'orderLine': [ ");
            //2.2 去orderdetail查出itemnumber，qty
            List<OrderDetailDO> sendlist = orderConsumer.selectDeliveryOrderSendMessage(ordernumber);

            for(OrderDetailDO send :sendlist){
                Long actualQty = send.getQty();
                String itemCode = send.getItemnumber();
                String uom = send.getUom();
                sb.append(" {'itemCode': ' "+itemCode+" ','actualQty': '"+actualQty+" ','unit':'"+uom+"'},");
            }
            sb.deleteCharAt(sb.length()-1);

            sb.append("]}}}");
            mi.setData(sb.toString());
            try {
                mqs.sendMsg(mi);
                log.debug("【单号为"+ordernumber+"的发货单确认接口发送成功！---发送的JSON内容为---"+sb+"】");
                orderConsumer.changeOrderStatusByOrderNumber(ordernumber,enterpriseid);
                log.debug("【单号为"+ordernumber+"的发货单在sp_order_main表的状态更改成功!");
            } catch (UnsupportedEncodingException | MQClientException
                    | RemotingException | MQBrokerException | InterruptedException e) {
                e.printStackTrace();
            }
        }

        //-----------------------------------------------------------

    }
}

注意：核心就是用StringBuilder的append方法拼接，这样的方法在复杂的多层json时比用对象包裹对象最后转json要方便的多 

StringBuilder sb = new StringBuilder();