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  • 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

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  • 原文地址:https://www.cnblogs.com/binz/p/9178988.html
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