spring cloud jackson 枚举json互转 枚举json序列化/反序列化

先定义一个枚举基类

import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 
@JsonDeserialize(using = BaseEnumDeserializer.class)
@JsonSerialize(using = BaseEnumSerializer.class)
public interface BaseEnum {
 
    /**
     * @description：必须在子类的重写方法返回具体的枚举name  ，例如return this.name()<br/>
     * @author： Binz
     */
    String getCode();
 
    String getDisplayName();
 
    static <E extends Enum<E>> BaseEnum valueOf(String enumCode,Class<E> clazz) {
        BaseEnum enumm = (BaseEnum) Enum.valueOf(clazz, enumCode);
        return enumm;
    }
}

定义自己的枚举并且实现 BaseEnum

/**
 * 通用状态，所有跟状态相关的都按照这个定义
 * @author Binz
 * @date 2019-05-14 11:28:25
 */
public enum CommonStatus implements BaseEnum{
    CREATE("新建"),
    //一般默认都是这个状态，只有特殊情况才会用到新建状态
    ENABLED("启用"),
    DISABLED("停用"),
    DELETE("删除")
    ;
 
    CommonStatus(String displayName){
        this.displayName = displayName;
    }
 
    private String displayName;
 
    @Override
    public String getDisplayName() {
        return displayName;
    }
 
    @Override
    public String getCode() {
        return this.name();
    }
 
}

自定义枚举转换器-序列化

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
 
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
/**
 * 用于BaseEum的子类解析成json格式，一般在api中注入此解析器
 * @author  Binz
 * 2019-05-27 11:29:02
 */
public class BaseEnumSerializer extends JsonSerializer<BaseEnum>{
 
    @Override
    public void serialize(BaseEnum value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
        Map<String,String> map = new HashMap<>();
        map.put("code", value.getCode());
        map.put("displayName", value.getDisplayName());
        gen.writeObject(map);
    }
 
}

自定义枚举转换器-反序列化

import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Collection;
 
import org.springframework.beans.BeanUtils;
 
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.JsonStreamContext;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.JsonNodeType;
 
/**
 * 接收BaseEnum反序列化
 * @author Binz
 */
public class BaseEnumDeserializer extends JsonDeserializer<BaseEnum>{
 
    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Override
    public BaseEnum deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
 
        JsonNode node = jp.getCodec().readTree(jp);
        String currentName = jp.currentName();
        Object currentValue = jp.getCurrentValue();
        Class findPropertyType = null;
        if(currentValue instanceof Collection) {
 
            JsonStreamContext parsingContext = jp.getParsingContext();
 
            JsonStreamContext parent = parsingContext.getParent();
            Object currentValue3 = parent.getCurrentValue();
            String currentName3 = parent.getCurrentName();
            try {
                Field listField = currentValue3.getClass().getDeclaredField(currentName3);
                ParameterizedType listGenericType = (ParameterizedType) listField.getGenericType();
                Type listActualTypeArguments = listGenericType.getActualTypeArguments()[0];
                findPropertyType = (Class) listActualTypeArguments;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }else {
            findPropertyType = BeanUtils.findPropertyType(currentName, currentValue.getClass());
        }
        if(findPropertyType == null) {
             throw new BaseException("数据格式异常");
        }
        String asText = null;
        if(node.getNodeType() == JsonNodeType.STRING) {
            asText = node.asText();
        }else{
            asText = node.get("code").asText();
        }
        BaseEnum valueOf = null;
        if(StringUtil.isNotBlank(asText)){
            valueOf = BaseEnum.valueOf(asText, findPropertyType);
        }
        return valueOf;
    }
 
}

然后spring cloud之间交互的实体类中的枚举就可以自动正常转换了，缺少的引用根据自身项目更改