动态Jackson字段过滤

import com.fasterxml.jackson.annotation.JsonFilter;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter;
import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider;

@JsonFilter("dynamicFilter")
class MyBean {
    private String field1;
    private String field2;
    // getters and setters
}

public class DynamicFilterExample {
    public static void main(String[] args) throws Exception {
        MyBean myBean = new MyBean();
        myBean.setField1("value1");
        myBean.setField2("value2");

        ObjectMapper mapper = new ObjectMapper();
        SimpleFilterProvider filterProvider = new SimpleFilterProvider();
        filterProvider.addFilter("dynamicFilter",
                SimpleBeanPropertyFilter.filterOutAllExcept("field1"));
        String json = mapper.writer(filterProvider)
                .writeValueAsString(myBean);

        System.out.println(json);
        // Output: {"field1":"value1"}
    }
}