使用 ModelMapper 反序列化 Json 时如何修复错误 START_ARRAY 令牌?

How to fix Error START_ARRAY token when deserializing Json with ModelMapper?

我正在尝试以这种格式反序列化 JSON 文件:

[
  ["AA", "GG", "1992/11/18"],
  ["BB", "DD", "2005/02/20"]
]

使用这个 class:

public class DataList {
    private List<String> att;
    // constructor, getter and setter
}

正在做:

DataList [] dataList= mapper.readValue(ResourceUtils.getFile("classpath:" + filename), DataList [].class);

但我得到:

    com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `org.example.DataList ` out of START_ARRAY token
 at [Source: (File); line: 2, column: 3] (through reference chain: java.lang.Object[][0])

知道如何解决这个错误吗?

Jackson 不知道如何将字符串数组映射到 DataList 对象。因此,您应该在 DataList 构造函数上添加 @JsonCreate 以向 Jackson 展示用于转换的内容。

public class DataList {

    private List<String> att;

    @JsonCreator
    public DataList(List<String> att) {
        this.att = att;
    }

    // constructor, getter and setter
}