我汇总了三种在Jackson中执行动态过滤的方法。其中之一必须满足您的需求。

使用 @JsonView

您可以使用@JsonView：

public class Views {         
    interface Simple { }  
    interface Detailed extends Simple { }   
}



public class Foo {

    @JsonView(Views.Simple.class)
    private String name;

    @JsonView(Views.Detailed.class)
    private String details;

    // Getters and setters
}



@RequestMapping("/foo")
@JsonView(Views.Detailed.class)
public Foo getFoo() {
    Foo foo = new Foo();
    return foo;
}

或者，您可以使用来动态设置视图MappingJacksonValue。

@RequestMapping("/foo")
public MappingJacksonValue getFoo() {
    Foo foo = new Foo();
    MappingJacksonValue result = new MappingJacksonValue(foo);
    result.setSerializationView(Views.Detailed.class);
    return result;
}

用一个 BeanSerializerModifier

您可以扩展BeanSerializerModifier然后覆盖该changeProperties()方法。它允许您根据需要添加，删除或替换任何要序列化的属性：

public class CustomSerializerModifier extends BeanSerializerModifier {

    @Override
    public List<BeanPropertyWriter> changeProperties(SerializationConfig config,
        BeanDescription beanDesc, List<BeanPropertyWriter> beanProperties) {

        // In this method you can add, remove or replace any of passed properties

        return beanProperties;
    }
}

然后将序列化器注册为模块ObjectMapper：

ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new SimpleModule() {

    @Override
    public void setupModule(SetupContext context) {
        super.setupModule(context);
        context.addBeanSerializerModifier(new CustomSerializerModifier());
    }
});

使用@JsonFilter带SimpleBeanPropertyFilter

另一种方法涉及@JsonFilter：

@JsonFilter("customPropertyFilter")
public class Foo {

    private String name;
    private String details;

    // Getters and setters
}

根据您的需要扩展SimpleBeanPropertyFilter和覆盖该serializeAsField()方法：

public class CustomPropertyFilter extends SimpleBeanPropertyFilter {

    @Override
    public void serializeAsField(Object pojo, JsonGenerator jgen,
                                 SerializerProvider provider, 
                                 PropertyWriter writer) throws Exception {

        // Serialize a field
        // writer.serializeAsField(pojo, jgen, provider, writer);

        // Omit a field from serialization
        // writer.serializeAsOmittedField(pojo, jgen, provider);
    }
}

然后在您的中注册过滤器ObjectMapper：

FilterProvider filterProvider = new SimpleFilterProvider()
        .addFilter("customPropertyFilter", new CustomPropertyFilter());

ObjectMapper mapper = new ObjectMapper();
mapper.setFilterProvider(filterProvider);

如果要将过滤器设置为 “全局”
，即要应用于所有bean，可以创建一个混合类，并使用以下方法对其进行注释@JsonFilter("customPropertyFilter")：

@JsonFilter("customPropertyFilter")
public class CustomPropertyFilterMixIn {

}

然后将混合类绑定到Object：

mapper.addMixIn(Object.class, CustomPropertyFilterMixIn.class);