在Jackson中处理属性的布尔值和空字符串？

public class MyObject {
    @JsonSerialize(using = BooleanSerializer.class)
    private boolean flag;

    @JsonSerialize(using = EmptyStringSerializer.class)
    private String name;

    // getters and setters
}

public class BooleanSerializer extends JsonSerializer<Boolean> {
    @Override
    public void serialize(Boolean value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
        if (value) {
            gen.writeString("true");
        } else {
            gen.writeString("false");
        }
    }
}

public class EmptyStringSerializer extends JsonSerializer<String> {
    @Override
    public void serialize(String value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
        if (value == null || value.isEmpty()) {
            gen.writeString("N/A");
        } else {
            gen.writeString(value);
        }
    }
}