Question

下面提到的是json字符串resultString {

{
"imageMaps": [{
        "crc": "c2c4",
        "flags": "0",
        "length": "117384",
        "index": 1,
        "version": "1.1.90ea",
        "status": ""
    }, {
        "crc": "7601",
        "flags": "8",
        "length": "117592",
        "index": 2,
        "version": "1.1.90ed",
        "status": ""
    }],
    "complete": true,
    "nextBootImageVersion": "",
    "lastKnownGoodImageVersion": "1.1.90ed",
    "runningImageVersion": "1.1.90ed"
}

我希望将其转换为A类的对象。

公共类A {

private boolean complete;

private String message;

private String lastKnownGoodImageVersion;

private String nextBootImageVersion;

private String runningImageVersion;

private Map<String, B> imageMaps;

private  List<B> images;

private MacID macId;

}

我正在尝试使用代码将json转换为A类的对象：

  ObjectMapper objectMapper = new ObjectMapper();
            objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);

a a = objectMapper.readValue（resultString，A.class）;

B类的代码是：

public static class B{
    public String version;
    public int flags; 
    public int crc; 
    public long length; 
    public String index;
    public String status;

}

但是出现异常：com.fasterxml.jackson.databind.JsonMappingException：无法从START_ARRAY令牌中反序列化java.util.LinkedHashMap实例

Answer 1

您在类中将属性imageMaps声明为Map<String, B>，但在JSON imageMaps中则是一个B数组。如果将imageMaps更改为images在您的JSON中。

无法从START_ARRAY令牌中反序列化java.util.LinkedHashMap的实例

1 个答案: