我想通過 Jackson 解析 YAML 文件，但遇到的問題是其中一個屬性（我們稱之為“事件”）有一個名為“類型”的字符串和一個“屬性”對象，該對象因不同的事件而異。我的問題是我需要為此 YAML 定義 POJO。因此，我想定義一個帶有 VariableObject 的 Hashmap，它可以是任何一些預(yù)定義的類（為簡潔起見，假設(shè)為 Shipping 和 Inventory）。我怎樣才能實現(xiàn)這樣的Hashmap？public class Event { private static String type; private static Map<String, VariableObject> properties; public static void main(String[] args) { Inventory inventory = new Inventory("inventoryName", 13); properties.put("Inventory", inventory); Shipping shipping = new Shipping("shippingName", true); properties.put("Shipping", shipping); }}public class Inventory { private static String name; private static int someNumber; public Inventory(String name, int someNumber) { this.name = name; this.someNumber = someNumber; }}public class Shipping { private static String name; private static boolean someBoolean; public Shipping(String name, boolean someBoolean) { this.name = name; this.someBoolean = someBoolean; }}
2 回答
ABOUTYOU
TA貢獻(xiàn)1812條經(jīng)驗 獲得超5個贊
你說的很簡單Object。它是最具體的常見超類：
private static Map<String, Object> properties;
其他解決方案是制作Inventory和Shipping實現(xiàn)一些通用接口，例如Named并將其用作HashMap.
RISEBY
TA貢獻(xiàn)1856條經(jīng)驗 獲得超5個贊
一種方法是制作Shipping和Inventory實現(xiàn)相同的接口（如VariableObject在您的 cas 中）
public class Event {
private static String type;
private static Map<String, VariableObject> properties;
public static void main(String[] args) {
Inventory inventory = new Inventory("inventoryName", 13);
properties.put("Inventory", inventory);
Shipping shipping = new Shipping("shippingName", true);
properties.put("Shipping", shipping);
}
}
public interface VariableObject{
//you can define common methods here if you want
}
public class Inventory implements VariableObject{
private static String name;
private static int someNumber;
public Inventory(String name, int someNumber) {
this.name = name;
this.someNumber = someNumber;
}
}
public class Shipping implements VariableObject{
private static String name;
private static boolean someBoolean;
public Shipping(String name, boolean someBoolean) {
this.name = name;
this.someBoolean = someBoolean;
}
}
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