我如何接收一个 dto，将地图作为其属性之一，作为我的控制器的参数？（休息 API）

Question

当我尝试发送它时，它显示“错误”：“错误请求”， “trace”：“...HttpMessageNotReadableException：JSON 解析错误：无法从字符串“quoteDate”反序列化 java.time.LocalDate 类型的映射键：无法反序列化 java.time.LocalDate”

我通过邮递员发送的JSON：

{
    "stockId":"test3",
    "quotes":[
        {
        "quoteDate":"2003-05-14",
        "quoteValue":"35.9"
        },
        {
        "quoteDate":"2016-03-28",
        "quoteValue":"55.0"
        }
    ]
}

控制器：

@PostMapping("/stock/save")
    public void saveQuotes(@RequestBody StockDTO stockDTO) {
        System.out.println(stockDTO.toString());
    }

DTO

public class StockDTO {
    String id;
    String stockId;
    Map<LocalDate, Double> quotes;
}

Answer 1

对于引号，根据 json 字符串应该出现的数据类型是列表。但在 DTO 中得到了一个地图。
DTO 应该是 ::

import com.google.gson.Gson;

import java.util.List;

public class GsonMappingExample {
    public static void main(String[] args) {
        String jsonString = "{\"stockId\":\"test3\",\"quotes\":[{\"quoteDate\":\"2003-05-14\",\"quoteValue\":\"35.9\"},{\"quoteDate\":\"2016-03-28\",\"quoteValue\":\"55.0\"}]}";
        Gson gson = new Gson();
        StockDTO stockDTO = gson.fromJson(jsonString, StockDTO.class);
        System.out.println(stockDTO);
    }
}

class StockDTO {
    private final String stockId;
    private final List<Quote> quotes;

    public StockDTO(String stockId, List<Quote> quotes) {
        this.stockId = stockId;
        this.quotes = quotes;
    }

    @Override
    public String toString() {
        return "StockDTO{" +
                "stockId='" + stockId + '\'' +
                ", quoteList=" + quotes +
                '}';
    }
}

class Quote {
    private final String quoteDate;
    private final Double quoteValue;

    public Quote(String quoteDate, Double quoteValue) {
        this.quoteDate = quoteDate;
        this.quoteValue = quoteValue;
    }

    @Override
    public String toString() {
        return "Quote{" +
                "quoteDate=" + quoteDate +
                ", quoteValue=" + quoteValue +
                '}';
    }
}

PS：这里我使用 Gson 库来解析 json 字符串，spring-boot 自动执行此操作（我认为使用 Jackson 库！）

我如何接收一个 dto，将地图作为其属性之一，作为我的控制器的参数？（休息 API）

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我如何接收一个 dto，将地图作为其属性之一，作为我的控制器的参数？ （休息 API）

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我如何接收一个 dto，将地图作为其属性之一，作为我的控制器的参数？（休息 API）