1.
//POJO 交易类
public class TradeTransaction {
private String id; //交易ID
private double price;//交易金额
public TradeTransaction(){}
public TradeTransaction(String id,double price){
super();
this.id = id;
this.price = price;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
}//POJO 交易类
public class TradeTransactio