【Java】接口开发中关于接受和发送json的相关范例

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;
}}

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();