spring cloud jackson 枚舉json互轉 枚舉json序列化/反序列化

先定義一個枚舉基類

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：必須在子類的重寫方法返回具體的枚舉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;
    }
}

 

 

 

 

定義自己的枚舉並且實現 BaseEnum

/**
 * 通用狀態，所有跟狀態相關的都按照這個定義
 * @author Binz
 * @date 2019-05-14 11:28:25
 */
public enum CommonStatus implements BaseEnum{
    CREATE("新建"),
    //一般默認都是這個狀態，只有特殊情況才會用到新建狀態
    ENABLED("啟用"),
    DISABLED("停用"),
    DELETE("刪除")
    ;
    
    CommonStatus(String displayName){
        this.displayName = displayName;
    }
    
    private String displayName;

    @Override
    public String getDisplayName() {
        return displayName;
    }

    @Override
    public String getCode() {
        return this.name();
    }

}

 

 

 

 

自定義枚舉轉換器-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;
/**
 * 用於BaseEum的子類解析成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);
    }

}

 

 

 自定義枚舉轉換器-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("數據格式異常");
        }
        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之間交互的實體類中的枚舉就可以自動正常轉換了，缺少的引用根據自身項目更改