在设置序列化器时使用@JsonSerialize，以确保正确序列化对象。

代码示例：

public class MyClass {

@JsonSerialize(using = CustomSerializer.class)
private CustomObject customObject;

// getters and setters

}

public class CustomObject {

private String field1;
private int field2;

public CustomObject(String field1, int field2) {
this.field1 = field1;
this.field2 = field2;
}

// getters and setters

}

public class CustomSerializer extends JsonSerializer {

@Override
public void serialize(CustomObject value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
gen.writeStartObject();
gen.writeStringField("field1", value.getField1());
gen.writeNumberField("field2", value.getField2());
gen.writeEndObject();
}
}