gistfile1.txt

@Data

public class QueryCarRequestInfo {

    public TreeMap getTreeMap(){
        return this.treeMap;
    }
       //有参构造函数
    QueryCarRequestInfo(TreeMap data) throws Exception {
        this.data=data;
        this.appId=Constant.appId;
        this.timestamp= System.currentTimeMillis();
        
        TreeMap<String, Object> treeMap = new TreeMap<>();
        treeMap.put("appId",this.appId);
        treeMap.put("data", this.data);
        treeMap.put("timestamp", this.timestamp);
        String mapString  = JSON.toJSONString(treeMap);
        String sign = HMacMD5.encodeMac(mapString, Constant.KEY);
        this.signature=sign;
        treeMap.put("signature", this.signature);
        this.treeMap = treeMap;
    }

}

子类
public class RefundInfo extends QueryCarRequestInfo {
    public RefundInfo(TreeMap data) throws Exception {
        super(data);
    }
}

以上是这个类  下面是调用:

@Override
public String refund(String plateNum, final String OrderId, Integer amount) throws Exception {
TreeMap<String, Object> treeMap = new TreeMap<>(); //新建空的 treemap

treeMap.put("refundId", System.currentTimeMillis() + "refund"); //组织参数
treeMap.put("plateNumber", plateNum);//组织参数
treeMap.put("refundAmount", amount);//组织参数
treeMap.put("orderId", OrderId);//组织参数

RefundInfo carOutRequestInfo = new RefundInfo(treeMap);
String post = UrlConnectUtil.post( Constant.baseUrl + "/refund/bill", carOutRequestInfo.getTreeMap());

//对response做处理
if (StringUtils.isNotBlank(post)) {
xxx
}