[alibaba/fastjson]使用JSONCreator初始化实例后，反序列化不调用Setter。

见代码：

public class HostPoint implements Serializable {

    // ------------------------------------------------------------------------

    private final static long serialVersionUID = 1L;

    private final HostAddress address;

    @JSONField(name = "fingerprint")
    private Fingerprint fingerprint;

    @JSONField(name = "unkown")
    private boolean unkown;

    // ------------------------------------------------------------------------

    @JSONCreator
    public HostPoint(@JSONField(name = "address") HostAddress addr) {
        this.address = addr;
    }

    // ------------------------------------------------------------------------

    public boolean isChanged() {
        return false;
    }

    public boolean isMatched() {
        return false;
    }

    // ------------------------------------------------------------------------

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(getClass()) //
            .addValue(address)                        //
            .addValue(fingerprint)                    //
            .toString();
    }

    @Override
    public int hashCode() {
        return Objects.hash(address);
    }

    // ------------------------------------------------------------------------

    public HostAddress getAddress() {
        return address;
    }

    public Fingerprint getFingerprint() {
        return fingerprint;
    }

    public void setFingerprint(Fingerprint fingerprint) {
        this.fingerprint = fingerprint;
    }

    public boolean isUnkown() {
        return unkown;
    }

    public void setUnkown(boolean unkown) {
        this.unkown = unkown;
    }

}

调用反序列化后，如下打印：

HostPoint{HostAddress{192.168.10.101}, null}

调用JSONObject obj, 打印JSON如下：

{
    "address":{
        "hostAddress":"192.168.10.101"
    },
    "unkown":false,
    "fingerprint":{
        "source":"abc"
    },
    "matched":false,
    "changed":false
}

即在使用标签指定构造器后，反序列化器不调用Setter了。