java - UnrecognizedPropertyException 对我来说没有意义

Question

我有一个 JSON 映射，其中包含简单数据类型(字符串)和复杂数据类型。我创建了一个结构来处理这个问题。这是:

public static class PayloadData {
    String authkey;
    PizzaPlaceTo pizzaPlace;
    Map<String, List<String>> updates;
}

现在，我像这样读取数据:

    PayloadData payloadData = objectMapper.readValue(payload, PayloadData.class);

它给了我:

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "authkey" (class pizzainthecloud.pizzaplace.controller.PizzaPlaceController$PayloadData), not marked as ignorable (0 known properties: ])
 at [Source: {"authkey":"Don't Panic!","pizzaPlace":{"contactName":null,"customerId":null}; line: 1, column: 13] (through reference chain: pizzainthecloud.pizzaplace.controller.PizzaPlaceController$PayloadData["authkey"])

所以，如果我没看错的话，它告诉我接收类中没有 authkey 来接收 JSON 数据中的 authkey，对吗？只有这样。

请帮忙。

Answer 1

所以，看起来 Jackson 只适用于 bean，而不适用于结构样式类。我将类(class)更改为:

public static class PayloadData {
    private String authkey;
    private PizzaPlaceTo pizzaPlace;
    private Map<String, List<String>> updates;

    public String getAuthkey() {
        return authkey;
    }

    public void setAuthkey(String authkey) {
        this.authkey = authkey;
    }

    public PizzaPlaceTo getPizzaPlace() {
        return pizzaPlace;
    }

    public void setPizzaPlace(PizzaPlaceTo pizzaPlace) {
        this.pizzaPlace = pizzaPlace;
    }

    public Map<String, List<String>> getUpdates() {
        return updates;
    }

    public void setUpdates(Map<String, List<String>> updates) {
        this.updates = updates;
    }
}

问题就这样解决了。