java spring springfox swagger2 原生字段修改问题

如果项目要求更改原生字段的展示形式。如date boolean等类型。虽然可以口头约定，但是这个不是最好的办法。个人觉得最好的办法就是不改。如果要改的话，只能在swagger2的序列化程序上入手。没办法，这方面springfox swagger2在现在的版本是写死的。我用的版本是2.9.2。

首先要写一个springfox swagger的序列化器的覆盖

import java.util.Collections;

import java.util.List;

import com.fasterxml.jackson.core.JsonProcessingException;

import com.fasterxml.jackson.databind.ObjectMapper;

import springfox.documentation.spring.web.json.JacksonModuleRegistrar;

import springfox.documentation.spring.web.json.Json;

import springfox.documentation.spring.web.json.JsonSerializer;

/**

* 覆盖swagger的实现以使用自己定义的序列化规则

* @author yanggan

* @date 2019年1月25日 下午6:33:42

*/

public class JsonSerializerOverride extends JsonSerializer {

    public JsonSerializerOverride(List modules, ObjectMapper objectMapper) {

        super(Collections.emptyList());

        this.objectMapper = objectMapper;

        for (JacksonModuleRegistrar each : modules) {

            each.maybeRegisterModule(objectMapper);

        }

    }

    private ObjectMapper objectMapper;

    @Override

    public Json toJson(Object toSerialize) {

        try {

            return new Json(objectMapper.writeValueAsString(toSerialize));

        } catch (JsonProcessingException e) {

            throw new RuntimeException("Could not write JSON", e);

        }

    }

}

然后编写自定义序列化

import java.io.IOException;

import java.util.Arrays;

import org.springframework.beans.BeanUtils;

import com.fasterxml.jackson.core.JsonGenerator;

import com.fasterxml.jackson.databind.JsonNode;

import com.fasterxml.jackson.databind.JsonSerializer;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.fasterxml.jackson.databind.SerializerProvider;

import io.swagger.models.properties.BooleanProperty;

import io.swagger.models.properties.IntegerProperty;

public class BooleanPropertySerializer extends JsonSerializer {

    private ObjectMapper objectMapper = new ObjectMapper();

    public BooleanPropertySerializer(ObjectMapper objectMapper) {

        super();

        this.objectMapper = objectMapper;

    }

    @Override

    public void serialize(BooleanProperty value, JsonGenerator gen, SerializerProvider serializers) throws IOException {

        IntegerProperty newBooleanProperty = new IntegerProperty();

        BeanUtils.copyProperties(value, newBooleanProperty);

        newBooleanProperty.setType("integer");

        newBooleanProperty.setFormat("int32");

        newBooleanProperty.setExample(1);

        newBooleanProperty.setEnum(Arrays.asList(0, 1));

        JsonNode valueToTree = objectMapper.valueToTree(newBooleanProperty);

        gen.writeTree(valueToTree);

    }

    @Override

    public Class handledType() {

        return BooleanProperty.class;

    }

}

最后在配置里覆盖JsonSerializer

@Bean

    @Primary

    public JsonSerializer jsonSerializer(List modules) {

        ObjectMapper objectMapper = new ObjectMapper();

        objectMapper.setSerializationInclusion(Include.NON_NULL);

        Jackson2ObjectMapperBuilder build = Jackson2ObjectMapperBuilder.json()

                .serializers( new BooleanPropertySerializer(objectMapper));

        return new JsonSerializerOverride(modules, build.build());

    }

这样就行了