Java – use Jackson to deserialize arrays

I have a json-rpc client like this, I can't deserialize it

{"value":"xxxx","type":"xxxx"}

Objects I want to deserialize:

@JsonAutoDetect
@JsonDeserialize()
public class ReturnValue {

private Object value;
private String type;

@JsonCreator
public ReturnValue(@JsonProperty("value") String val,@JsonProperty("type") String type) {
    value = val;
    this.type = type;
}

...getters,setters...

This seems to work properly. If the value is string, but if it is array type, it will throw a jsonmapping exception - unable to start from start_ Deserialize Java. XML in array tag Examples of lang.string are JSON like this:

{\"value\":[8,10],\"type\":\"[int]\"}

The code is:

int[] arr = (int[])getReturnValue(jsonString).getValue();

Getreturnvalue is not special:

ObjectMapper om = new ObjectMapper();
    ReturnValue rv = null;
    rv = om.readValue(json,ReturnValue.class);
    return rv;

Another problem is that I want the type attribute to be class type, but this throws another mapping exception Jackson has no way to do this, or I have to convert myself from string to appropriate class Thank you for any advice

Solution

Change the constructor to:

@JsonCreator
public ReturnValue(@JsonProperty("value") Object val,@JsonProperty("type") String type) {

Because, as the error indicates, it doesn't know how to generate a string from the array However, both string and JSON array can be converted to object; If so, it will be a Java string, or a Java list (for JSON arrays), or a Java map (for JSON objects)